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From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, david@redhat.com, glider@google.com,
	keescook@chromium.org, labbott@kernel.org, linux-mm@kvack.org,
	mateusznosek0@gmail.com, mhocko@kernel.org,
	mm-commits@vger.kernel.org, rafael.j.wysocki@intel.com,
	rppt@linux.ibm.com, torvalds@linux-foundation.org,
	vbabka@suse.cz
Subject: [patch 175/200] mm, page_poison: use static key more efficiently
Date: Mon, 14 Dec 2020 19:13:34 -0800	[thread overview]
Message-ID: <20201215031334.d8lfhIMKJ%akpm@linux-foundation.org> (raw)
In-Reply-To: <20201214190237.a17b70ae14f129e2dca3d204@linux-foundation.org>

From: Vlastimil Babka <vbabka@suse.cz>
Subject: mm, page_poison: use static key more efficiently

Commit 11c9c7edae06 ("mm/page_poison.c: replace bool variable with static
key") changed page_poisoning_enabled() to a static key check.  However,
the function is not inlined, so each check still involves a function call
with overhead not eliminated when page poisoning is disabled.

Analogically to how debug_pagealloc is handled, this patch converts
page_poisoning_enabled() back to boolean check, and introduces
page_poisoning_enabled_static() for fast paths.  Both functions are
inlined.

The function kernel_poison_pages() is also called unconditionally and does
the static key check inside.  Remove it from there and put it to callers. 
Also split it to two functions kernel_poison_pages() and
kernel_unpoison_pages() instead of the confusing bool parameter.

Also optimize the check that enables page poisoning instead of
debug_pagealloc for architectures without proper debug_pagealloc support. 
Move the check to init_mem_debugging_and_hardening() to enable a single
static key instead of having two static branches in
page_poisoning_enabled_static().

Link: https://lkml.kernel.org/r/20201113104033.22907-3-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Laura Abbott <labbott@kernel.org>
Cc: Mateusz Nosek <mateusznosek0@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/virtio/virtio_balloon.c |    2 -
 include/linux/mm.h              |   33 ++++++++++++++++--
 mm/page_alloc.c                 |   18 ++++++++--
 mm/page_poison.c                |   53 +++---------------------------
 4 files changed, 52 insertions(+), 54 deletions(-)

--- a/drivers/virtio/virtio_balloon.c~mm-page_poison-use-static-key-more-efficiently
+++ a/drivers/virtio/virtio_balloon.c
@@ -1116,7 +1116,7 @@ static int virtballoon_validate(struct v
 	 */
 	if (!want_init_on_free() &&
 	    (IS_ENABLED(CONFIG_PAGE_POISONING_NO_SANITY) ||
-	     !page_poisoning_enabled()))
+	     !page_poisoning_enabled_static()))
 		__virtio_clear_bit(vdev, VIRTIO_BALLOON_F_PAGE_POISON);
 	else if (!virtio_has_feature(vdev, VIRTIO_BALLOON_F_PAGE_POISON))
 		__virtio_clear_bit(vdev, VIRTIO_BALLOON_F_REPORTING);
--- a/include/linux/mm.h~mm-page_poison-use-static-key-more-efficiently
+++ a/include/linux/mm.h
@@ -2874,12 +2874,37 @@ extern int apply_to_existing_page_range(
 
 extern void init_mem_debugging_and_hardening(void);
 #ifdef CONFIG_PAGE_POISONING
-extern bool page_poisoning_enabled(void);
-extern void kernel_poison_pages(struct page *page, int numpages, int enable);
+extern void __kernel_poison_pages(struct page *page, int numpages);
+extern void __kernel_unpoison_pages(struct page *page, int numpages);
+extern bool _page_poisoning_enabled_early;
+DECLARE_STATIC_KEY_FALSE(_page_poisoning_enabled);
+static inline bool page_poisoning_enabled(void)
+{
+	return _page_poisoning_enabled_early;
+}
+/*
+ * For use in fast paths after init_mem_debugging() has run, or when a
+ * false negative result is not harmful when called too early.
+ */
+static inline bool page_poisoning_enabled_static(void)
+{
+	return static_branch_unlikely(&_page_poisoning_enabled);
+}
+static inline void kernel_poison_pages(struct page *page, int numpages)
+{
+	if (page_poisoning_enabled_static())
+		__kernel_poison_pages(page, numpages);
+}
+static inline void kernel_unpoison_pages(struct page *page, int numpages)
+{
+	if (page_poisoning_enabled_static())
+		__kernel_unpoison_pages(page, numpages);
+}
 #else
 static inline bool page_poisoning_enabled(void) { return false; }
-static inline void kernel_poison_pages(struct page *page, int numpages,
-					int enable) { }
+static inline bool page_poisoning_enabled_static(void) { return false; }
+static inline void kernel_poison_pages(struct page *page, int numpages) { }
+static inline void kernel_unpoison_pages(struct page *page, int numpages) { }
 #endif
 
 DECLARE_STATIC_KEY_FALSE(init_on_alloc);
--- a/mm/page_alloc.c~mm-page_poison-use-static-key-more-efficiently
+++ a/mm/page_alloc.c
@@ -777,6 +777,17 @@ void init_mem_debugging_and_hardening(vo
 			static_branch_enable(&init_on_free);
 	}
 
+#ifdef CONFIG_PAGE_POISONING
+	/*
+	 * Page poisoning is debug page alloc for some arches. If
+	 * either of those options are enabled, enable poisoning.
+	 */
+	if (page_poisoning_enabled() ||
+	     (!IS_ENABLED(CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC) &&
+	      debug_pagealloc_enabled()))
+		static_branch_enable(&_page_poisoning_enabled);
+#endif
+
 #ifdef CONFIG_DEBUG_PAGEALLOC
 	if (!debug_pagealloc_enabled())
 		return;
@@ -1262,7 +1273,8 @@ static __always_inline bool free_pages_p
 	if (want_init_on_free())
 		kernel_init_free_pages(page, 1 << order);
 
-	kernel_poison_pages(page, 1 << order, 0);
+	kernel_poison_pages(page, 1 << order);
+
 	/*
 	 * arch_free_page() can make the page's contents inaccessible.  s390
 	 * does this.  So nothing which can access the page's contents should
@@ -2219,7 +2231,7 @@ static inline int check_new_page(struct
 static inline bool free_pages_prezeroed(void)
 {
 	return (IS_ENABLED(CONFIG_PAGE_POISONING_ZERO) &&
-		page_poisoning_enabled()) || want_init_on_free();
+		page_poisoning_enabled_static()) || want_init_on_free();
 }
 
 #ifdef CONFIG_DEBUG_VM
@@ -2281,7 +2293,7 @@ inline void post_alloc_hook(struct page
 	arch_alloc_page(page, order);
 	debug_pagealloc_map_pages(page, 1 << order);
 	kasan_alloc_pages(page, order);
-	kernel_poison_pages(page, 1 << order, 1);
+	kernel_unpoison_pages(page, 1 << order);
 	set_page_owner(page, order, gfp_flags);
 
 	if (!free_pages_prezeroed() && want_init_on_alloc(gfp_flags))
--- a/mm/page_poison.c~mm-page_poison-use-static-key-more-efficiently
+++ a/mm/page_poison.c
@@ -8,45 +8,17 @@
 #include <linux/ratelimit.h>
 #include <linux/kasan.h>
 
-static DEFINE_STATIC_KEY_FALSE_RO(want_page_poisoning);
+bool _page_poisoning_enabled_early;
+EXPORT_SYMBOL(_page_poisoning_enabled_early);
+DEFINE_STATIC_KEY_FALSE(_page_poisoning_enabled);
+EXPORT_SYMBOL(_page_poisoning_enabled);
 
 static int __init early_page_poison_param(char *buf)
 {
-	int ret;
-	bool tmp;
-
-	ret = strtobool(buf, &tmp);
-	if (ret)
-		return ret;
-
-	if (tmp)
-		static_branch_enable(&want_page_poisoning);
-	else
-		static_branch_disable(&want_page_poisoning);
-
-	return 0;
+	return kstrtobool(buf, &_page_poisoning_enabled_early);
 }
 early_param("page_poison", early_page_poison_param);
 
-/**
- * page_poisoning_enabled - check if page poisoning is enabled
- *
- * Return true if page poisoning is enabled, or false if not.
- */
-bool page_poisoning_enabled(void)
-{
-	/*
-	 * Assumes that debug_pagealloc_enabled is set before
-	 * memblock_free_all.
-	 * Page poisoning is debug page alloc for some arches. If
-	 * either of those options are enabled, enable poisoning.
-	 */
-	return (static_branch_unlikely(&want_page_poisoning) ||
-		(!IS_ENABLED(CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC) &&
-		debug_pagealloc_enabled()));
-}
-EXPORT_SYMBOL_GPL(page_poisoning_enabled);
-
 static void poison_page(struct page *page)
 {
 	void *addr = kmap_atomic(page);
@@ -58,7 +30,7 @@ static void poison_page(struct page *pag
 	kunmap_atomic(addr);
 }
 
-static void poison_pages(struct page *page, int n)
+void __kernel_poison_pages(struct page *page, int n)
 {
 	int i;
 
@@ -117,7 +89,7 @@ static void unpoison_page(struct page *p
 	kunmap_atomic(addr);
 }
 
-static void unpoison_pages(struct page *page, int n)
+void __kernel_unpoison_pages(struct page *page, int n)
 {
 	int i;
 
@@ -125,17 +97,6 @@ static void unpoison_pages(struct page *
 		unpoison_page(page + i);
 }
 
-void kernel_poison_pages(struct page *page, int numpages, int enable)
-{
-	if (!page_poisoning_enabled())
-		return;
-
-	if (enable)
-		unpoison_pages(page, numpages);
-	else
-		poison_pages(page, numpages);
-}
-
 #ifndef CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC
 void __kernel_map_pages(struct page *page, int numpages, int enable)
 {
_


  parent reply	other threads:[~2020-12-15  3:13 UTC|newest]

Thread overview: 215+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-15  3:02 incoming Andrew Morton
2020-12-15  3:03 ` [patch 001/200] kthread: add kthread_work tracepoints Andrew Morton
2020-12-15  3:03 ` [patch 002/200] kthread_worker: document CPU hotplug handling Andrew Morton
2020-12-15  3:03 ` [patch 003/200] uapi: move constants from <linux/kernel.h> to <linux/const.h> Andrew Morton
2020-12-15  3:03 ` [patch 004/200] ide/falcon: remove in_interrupt() usage Andrew Morton
2020-12-15  3:03 ` [patch 005/200] ide: remove BUG_ON(in_interrupt() || irqs_disabled()) from ide_unregister() Andrew Morton
2020-12-15  3:03 ` [patch 006/200] fs/ntfs: remove unused varibles Andrew Morton
2020-12-15  3:03 ` [patch 007/200] fs/ntfs: remove unused variable attr_len Andrew Morton
2020-12-15  3:03 ` [patch 008/200] fs/ocfs2/cluster/tcp.c: remove unneeded break Andrew Morton
2020-12-15  3:03 ` [patch 009/200] ocfs2: ratelimit the 'max lookup times reached' notice Andrew Morton
2020-12-15  3:03 ` [patch 010/200] arch/Kconfig: fix spelling mistakes Andrew Morton
2020-12-15  3:03 ` [patch 011/200] mm/slab_common.c: use list_for_each_entry in dump_unreclaimable_slab() Andrew Morton
2020-12-15  3:03 ` [patch 012/200] mm: slab: clarify krealloc()'s behavior with __GFP_ZERO Andrew Morton
2020-12-15 14:30   ` Christian König
2020-12-15 19:08     ` Andy Shevchenko
2020-12-16  7:47       ` Christian König
2020-12-16 11:23         ` Andy Shevchenko
2020-12-15  3:03 ` [patch 013/200] mm: slab: provide krealloc_array() Andrew Morton
2020-12-15  3:03 ` [patch 014/200] ALSA: pcm: use krealloc_array() Andrew Morton
2020-12-15  3:04 ` [patch 015/200] vhost: vringh: " Andrew Morton
2020-12-15  3:04 ` [patch 016/200] pinctrl: " Andrew Morton
2020-12-15  3:04 ` [patch 017/200] edac: ghes: " Andrew Morton
2020-12-15  3:04 ` [patch 018/200] drm: atomic: " Andrew Morton
2020-12-15  3:04 ` [patch 019/200] hwtracing: intel: " Andrew Morton
2020-12-15  3:04 ` [patch 020/200] dma-buf: " Andrew Morton
2020-12-15  7:42   ` Christian König
2020-12-15  3:04 ` [patch 021/200] mm, slab, slub: clear the slab_cache field when freeing page Andrew Morton
2020-12-15  3:04 ` [patch 022/200] mm/slab: rerform init_on_free earlier Andrew Morton
2020-12-15 16:45   ` Alexander Potapenko
2020-12-15 20:46     ` Alexander Popov
2020-12-15 21:08       ` Alexander Popov
2020-12-15  3:04 ` [patch 023/200] mm, slub: use kmem_cache_debug_flags() in deactivate_slab() Andrew Morton
2020-12-15  3:04 ` [patch 024/200] mm/slub: let number of online CPUs determine the slub page order Andrew Morton
2020-12-15  3:04 ` [patch 025/200] device-dax/kmem: use struct_size() Andrew Morton
2020-12-15  3:04 ` [patch 026/200] mm: fix page_owner initializing issue for arm32 Andrew Morton
2020-12-15  3:04 ` [patch 027/200] mm/page_owner: record timestamp and pid Andrew Morton
2020-12-15  3:04 ` [patch 028/200] mm/filemap/c: break generic_file_buffered_read up into multiple functions Andrew Morton
2020-12-15  3:04 ` [patch 029/200] mm/filemap.c: generic_file_buffered_read() now uses find_get_pages_contig Andrew Morton
2020-12-15  3:04 ` [patch 030/200] mm/truncate: add parameter explanation for invalidate_mapping_pagevec Andrew Morton
2020-12-15  3:05 ` [patch 031/200] mm/filemap.c: remove else after a return Andrew Morton
2020-12-15  3:05 ` [patch 032/200] mm/gup_benchmark: rename to mm/gup_test Andrew Morton
2020-12-15  3:05 ` [patch 033/200] selftests/vm: use a common gup_test.h Andrew Morton
2020-12-15  3:05 ` [patch 034/200] selftests/vm: rename run_vmtests --> run_vmtests.sh Andrew Morton
2020-12-15  3:05 ` [patch 035/200] selftests/vm: minor cleanup: Makefile and gup_test.c Andrew Morton
2020-12-15  3:05 ` [patch 036/200] selftests/vm: only some gup_test items are really benchmarks Andrew Morton
2020-12-15  3:05 ` [patch 037/200] selftests/vm: gup_test: introduce the dump_pages() sub-test Andrew Morton
2020-12-15  3:05 ` [patch 038/200] selftests/vm: run_vmtests.sh: update and clean up gup_test invocation Andrew Morton
2020-12-15  3:05 ` [patch 039/200] selftests/vm: hmm-tests: remove the libhugetlbfs dependency Andrew Morton
2020-12-15  3:05 ` [patch 040/200] selftests/vm: 2x speedup for run_vmtests.sh Andrew Morton
2020-12-15  3:05 ` [patch 041/200] mm/gup_test.c: mark gup_test_init as __init function Andrew Morton
2020-12-15  3:05 ` [patch 042/200] mm/gup_test: GUP_TEST depends on DEBUG_FS Andrew Morton
2020-12-15  3:05 ` [patch 043/200] mm/gup: reorganize internal_get_user_pages_fast() Andrew Morton
2020-12-15  3:05 ` [patch 044/200] mm/gup: prevent gup_fast from racing with COW during fork Andrew Morton
2020-12-15  3:05 ` [patch 045/200] mm/gup: remove the vma allocation from gup_longterm_locked() Andrew Morton
2020-12-15  3:05 ` [patch 046/200] mm/gup: combine put_compound_head() and unpin_user_page() Andrew Morton
2020-12-15  3:05 ` [patch 047/200] mm: handle zone device pages in release_pages() Andrew Morton
2020-12-15  3:05 ` [patch 048/200] mm/swapfile.c: use helper function swap_count() in add_swap_count_continuation() Andrew Morton
2020-12-15  3:06 ` [patch 049/200] mm/swap_state: skip meaningless swap cache readahead when ra_info.win == 0 Andrew Morton
2020-12-15  3:06 ` [patch 050/200] mm/swapfile.c: remove unnecessary out label in __swap_duplicate() Andrew Morton
2020-12-15  3:06 ` [patch 051/200] mm/swapfile.c: use memset to fill the swap_map with SWAP_HAS_CACHE Andrew Morton
2020-12-15  3:06 ` [patch 052/200] mm: remove pagevec_lookup_range_nr_tag() Andrew Morton
2020-12-15  3:06 ` [patch 053/200] mm/shmem.c: make shmem_mapping() inline Andrew Morton
2020-12-15  3:06 ` [patch 054/200] tmpfs: fix Documentation nits Andrew Morton
2020-12-15  3:06 ` [patch 055/200] mm: memcontrol: add file_thp, shmem_thp to memory.stat Andrew Morton
2020-12-15  3:06 ` [patch 056/200] mm: memcontrol: remove unused mod_memcg_obj_state() Andrew Morton
2020-12-15  3:06 ` [patch 057/200] mm: memcontrol: eliminate redundant check in __mem_cgroup_insert_exceeded() Andrew Morton
2020-12-15  3:06 ` [patch 058/200] mm: memcg/slab: fix return of child memcg objcg for root memcg Andrew Morton
2020-12-15  3:06 ` [patch 059/200] mm: memcg/slab: fix use after free in obj_cgroup_charge Andrew Morton
2020-12-15  3:06 ` [patch 060/200] mm/rmap: always do TTU_IGNORE_ACCESS Andrew Morton
2020-12-15  3:06 ` [patch 061/200] mm/memcg: update page struct member in comments Andrew Morton
2020-12-15  3:06 ` [patch 062/200] mm: memcg: fix obsolete code comments Andrew Morton
2020-12-15  3:06 ` [patch 063/200] mm: memcg: deprecate the non-hierarchical mode Andrew Morton
2020-12-15  3:06 ` [patch 064/200] docs: cgroup-v1: reflect the deprecation of " Andrew Morton
2020-12-15  3:06 ` [patch 065/200] cgroup: remove obsoleted broken_hierarchy and warned_broken_hierarchy Andrew Morton
2020-12-15  3:06 ` [patch 066/200] mm/page_counter: use page_counter_read in page_counter_set_max Andrew Morton
2020-12-15  3:07 ` [patch 067/200] mm: memcg: remove obsolete memcg_has_children() Andrew Morton
2020-12-15  3:07 ` [patch 068/200] mm: memcg/slab: rename *_lruvec_slab_state to *_lruvec_kmem_state Andrew Morton
2020-12-15  3:07 ` [patch 069/200] mm: memcontrol: sssign boolean values to a bool variable Andrew Morton
2020-12-15  3:07 ` [patch 070/200] mm/memcg: remove incorrect comment Andrew Morton
2020-12-15  3:07 ` [patch 071/200] mm: move lruvec stats update functions to vmstat.h Andrew Morton
2020-12-15  3:07 ` [patch 072/200] mm: memcontrol: account pagetables per node Andrew Morton
2020-12-15  3:07 ` [patch 073/200] xen/unpopulated-alloc: consolidate pgmap manipulation Andrew Morton
2020-12-15  3:07 ` [patch 074/200] kselftests: vm: add mremap tests Andrew Morton
2020-12-15  3:07 ` [patch 075/200] mm: speedup mremap on 1GB or larger regions Andrew Morton
2020-12-15 19:52   ` Linus Torvalds
2020-12-15 23:16     ` Kalesh Singh
2020-12-15  3:07 ` [patch 076/200] arm64: mremap speedup - enable HAVE_MOVE_PUD Andrew Morton
2020-12-15  3:07 ` [patch 077/200] x86: mremap speedup - Enable HAVE_MOVE_PUD Andrew Morton
2020-12-15  3:07 ` [patch 078/200] mm: cleanup: remove unused tsk arg from __access_remote_vm Andrew Morton
2020-12-15  3:07 ` [patch 079/200] mm/mapping_dirty_helpers: enhance the kernel-doc markups Andrew Morton
2020-12-15  3:07 ` [patch 080/200] mm/page_vma_mapped.c: add colon to fix kernel-doc markups error for check_pte Andrew Morton
2020-12-15  3:07 ` [patch 081/200] mm: mmap_lock: add tracepoints around lock acquisition Andrew Morton
2020-12-15  3:07 ` [patch 082/200] sparc: fix handling of page table constructor failure Andrew Morton
2020-12-15  3:08 ` [patch 083/200] mm: move free_unref_page to mm/internal.h Andrew Morton
2020-12-15  3:08 ` [patch 084/200] mm/mremap: account memory on do_munmap() failure Andrew Morton
2020-12-15  3:08 ` [patch 085/200] mm/mremap: for MREMAP_DONTUNMAP check security_vm_enough_memory_mm() Andrew Morton
2020-12-15  3:08 ` [patch 086/200] mremap: don't allow MREMAP_DONTUNMAP on special_mappings and aio Andrew Morton
2020-12-28 17:59   ` Brian Geffon
2020-12-15  3:08 ` [patch 087/200] vm_ops: rename .split() callback to .may_split() Andrew Morton
2020-12-15  3:08 ` [patch 088/200] mremap: check if it's possible to split original vma Andrew Morton
2020-12-15  3:08 ` [patch 089/200] mm: forbid splitting special mappings Andrew Morton
2020-12-15  3:08 ` [patch 090/200] mm: track mmu notifiers in fs_reclaim_acquire/release Andrew Morton
2020-12-15  3:08 ` [patch 091/200] mm: extract might_alloc() debug check Andrew Morton
2020-12-15  3:08 ` [patch 092/200] locking/selftests: add testcases for fs_reclaim Andrew Morton
2020-12-15  3:08 ` [patch 093/200] mm/vmalloc.c:__vmalloc_area_node(): avoid 32-bit overflow Andrew Morton
2020-12-15  3:08 ` [patch 094/200] mm/vmalloc: use free_vm_area() if an allocation fails Andrew Morton
2020-12-15  3:08 ` [patch 095/200] mm/vmalloc: rework the drain logic Andrew Morton
2020-12-15  3:08 ` [patch 096/200] mm/vmalloc: add 'align' parameter explanation for pvm_determine_end_from_reverse Andrew Morton
2020-12-15  3:08 ` [patch 097/200] mm/vmalloc.c: remove unnecessary return statement Andrew Morton
2020-12-15  3:08 ` [patch 098/200] mm/vmalloc: Fix unlock order in s_stop() Andrew Morton
2020-12-15  3:09 ` [patch 099/200] docs/vm: remove unused 3 items explanation for /proc/vmstat Andrew Morton
2020-12-15  3:09 ` [patch 100/200] mm/vmalloc.c: fix kasan shadow poisoning size Andrew Morton
2020-12-15  3:09 ` [patch 101/200] workqueue: kasan: record workqueue stack Andrew Morton
2020-12-15  3:09 ` [patch 102/200] kasan: print " Andrew Morton
2020-12-15  3:09 ` [patch 103/200] lib/test_kasan.c: add workqueue test case Andrew Morton
2020-12-15  3:09 ` [patch 104/200] kasan: update documentation for generic kasan Andrew Morton
2020-12-15  3:09 ` [patch 105/200] lkdtm: disable KASAN for rodata.o Andrew Morton
2020-12-15  3:09 ` [patch 106/200] alpha: switch from DISCONTIGMEM to SPARSEMEM Andrew Morton
2020-12-15  3:09 ` [patch 107/200] ia64: remove custom __early_pfn_to_nid() Andrew Morton
2020-12-15  3:09 ` [patch 108/200] ia64: remove 'ifdef CONFIG_ZONE_DMA32' statements Andrew Morton
2020-12-15  3:09 ` [patch 109/200] ia64: discontig: paging_init(): remove local max_pfn calculation Andrew Morton
2020-12-15  3:09 ` [patch 110/200] ia64: split virtual map initialization out of paging_init() Andrew Morton
2020-12-15  3:09 ` [patch 111/200] ia64: forbid using VIRTUAL_MEM_MAP with FLATMEM Andrew Morton
2020-12-15  3:09 ` [patch 112/200] ia64: make SPARSEMEM default and disable DISCONTIGMEM Andrew Morton
2020-12-15  3:09 ` [patch 113/200] arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL Andrew Morton
2020-12-15  3:09 ` [patch 114/200] arm, arm64: move free_unused_memmap() to generic mm Andrew Morton
2020-12-15  3:10 ` [patch 115/200] arc: use FLATMEM with freeing of unused memory map instead of DISCONTIGMEM Andrew Morton
2020-12-15  3:10 ` [patch 116/200] m68k/mm: make node data and node setup depend on CONFIG_DISCONTIGMEM Andrew Morton
2020-12-15  3:10 ` [patch 117/200] m68k/mm: enable use of generic memory_model.h for !DISCONTIGMEM Andrew Morton
2020-12-15  3:10 ` [patch 118/200] m68k: deprecate DISCONTIGMEM Andrew Morton
2020-12-15  3:10 ` [patch 119/200] mm: introduce debug_pagealloc_{map,unmap}_pages() helpers Andrew Morton
2020-12-15  3:10 ` [patch 120/200] PM: hibernate: make direct map manipulations more explicit Andrew Morton
2020-12-15  3:10 ` [patch 121/200] arch, mm: restore dependency of __kernel_map_pages() on DEBUG_PAGEALLOC Andrew Morton
2020-12-15  3:10 ` [patch 122/200] arch, mm: make kernel_page_present() always available Andrew Morton
2020-12-15  3:10 ` [patch 123/200] mm, page_alloc: clean up pageset high and batch update Andrew Morton
2020-12-15  3:10 ` [patch 124/200] mm, page_alloc: calculate pageset high and batch once per zone Andrew Morton
2020-12-15  3:10 ` [patch 125/200] mm, page_alloc: remove setup_pageset() Andrew Morton
2020-12-15  3:10 ` [patch 126/200] mm, page_alloc: simplify pageset_update() Andrew Morton
2020-12-15  3:10 ` [patch 127/200] mm, page_alloc: cache pageset high and batch in struct zone Andrew Morton
2020-12-15  3:10 ` [patch 128/200] mm, page_alloc: move draining pcplists to page isolation users Andrew Morton
2020-12-15  3:10 ` [patch 129/200] mm, page_alloc: disable pcplists during memory offline Andrew Morton
2020-12-15  3:11 ` [patch 130/200] include/linux/page-flags.h: remove unused __[Set|Clear]PagePrivate Andrew Morton
2020-12-15  3:11 ` [patch 131/200] mm/page-flags: fix comment Andrew Morton
2020-12-15  3:11 ` [patch 132/200] mm/page_alloc: add __free_pages() documentation Andrew Morton
2020-12-15  3:11 ` [patch 133/200] mm/page_alloc: mark some symbols with static keyword Andrew Morton
2020-12-15  3:11 ` [patch 134/200] mm/page_alloc: clear all pages in post_alloc_hook() with init_on_alloc=1 Andrew Morton
2020-12-15  3:11 ` [patch 135/200] init/main: fix broken buffer_init when DEFERRED_STRUCT_PAGE_INIT set Andrew Morton
2020-12-15  3:11 ` [patch 136/200] mm: page_alloc: refactor setup_per_zone_lowmem_reserve() Andrew Morton
2020-12-15  3:11 ` [patch 137/200] mm/page_alloc: speed up the iteration of max_order Andrew Morton
2020-12-15  3:11 ` [patch 138/200] mm,hwpoison: drain pcplists before bailing out for non-buddy zero-refcount page Andrew Morton
2020-12-15  3:11 ` [patch 139/200] mm,hwpoison: take free pages off the buddy freelists Andrew Morton
2020-12-15  3:11 ` [patch 140/200] mm,hwpoison: drop unneeded pcplist draining Andrew Morton
2020-12-15  3:11 ` [patch 141/200] mm,hwpoison: refactor get_any_page Andrew Morton
2020-12-15  3:11 ` [patch 142/200] mm,hwpoison: disable pcplists before grabbing a refcount Andrew Morton
2020-12-15  3:11 ` [patch 143/200] mm,hwpoison: remove drain_all_pages from shake_page Andrew Morton
2020-12-15  3:11 ` [patch 144/200] mm,memory_failure: always pin the page in madvise_inject_error Andrew Morton
2020-12-15  3:11 ` [patch 145/200] mm,hwpoison: return -EBUSY when migration fails Andrew Morton
2020-12-15  3:11 ` [patch 146/200] mm/hugetlb.c: just use put_page_testzero() instead of page_count() Andrew Morton
2020-12-15  3:11 ` [patch 147/200] include/linux/huge_mm.h: remove extern keyword Andrew Morton
2020-12-15  3:12 ` [patch 148/200] khugepaged: add parameter explanations for kernel-doc markup Andrew Morton
2020-12-15  3:12 ` [patch 149/200] mm: hugetlb: fix type of delta parameter and related local variables in gather_surplus_pages() Andrew Morton
2020-12-15  3:12 ` [patch 150/200] mm,hugetlb: remove unneeded initialization Andrew Morton
2020-12-15  3:12 ` [patch 151/200] hugetlb: fix an error code in hugetlb_reserve_pages() Andrew Morton
2020-12-15  3:12 ` [patch 152/200] mm: don't wake kswapd prematurely when watermark boosting is disabled Andrew Morton
2020-12-15  3:12 ` [patch 153/200] mm/vmscan: drop unneeded assignment in kswapd() Andrew Morton
2020-12-15  3:12 ` [patch 154/200] mm/vmscan.c: remove the filename in the top of file comment Andrew Morton
2020-12-15  3:12 ` [patch 155/200] mm/page_isolation: do not isolate the max order page Andrew Morton
2020-12-15  3:12 ` [patch 156/200] z3fold: simplify freeing slots Andrew Morton
2020-12-15  3:12 ` [patch 157/200] z3fold: stricter locking and more careful reclaim Andrew Morton
2020-12-15  3:12 ` [patch 158/200] z3fold: remove preempt disabled sections for RT Andrew Morton
2020-12-15  3:12 ` [patch 159/200] mm/compaction: rename 'start_pfn' to 'iteration_start_pfn' in compact_zone() Andrew Morton
2020-12-15  3:12 ` [patch 160/200] mm/compaction: move compaction_suitable's comment to right place Andrew Morton
2020-12-15  3:12 ` [patch 161/200] mm/compaction: make defer_compaction and compaction_deferred static Andrew Morton
2020-12-15  3:12 ` [patch 162/200] mm/oom_kill: change comment and rename is_dump_unreclaim_slabs() Andrew Morton
2020-12-15  3:12 ` [patch 163/200] mm/migrate.c: fix comment spelling Andrew Morton
2020-12-15  3:12 ` [patch 164/200] mm/migrate.c: optimize migrate_vma_pages() mmu notifier Andrew Morton
2020-12-15  3:12 ` [patch 165/200] mm: support THPs in zero_user_segments Andrew Morton
2020-12-15  3:13 ` [patch 166/200] mm: truncate_complete_page() does not exist any more Andrew Morton
2020-12-15  3:13 ` [patch 167/200] mm: migrate: simplify the logic for handling permanent failure Andrew Morton
2020-12-15  3:13 ` [patch 168/200] mm: migrate: skip shared exec THP for NUMA balancing Andrew Morton
2020-12-15  3:13 ` [patch 169/200] mm: migrate: clean up migrate_prep{_local} Andrew Morton
2020-12-15  3:13 ` [patch 170/200] mm: migrate: return -ENOSYS if THP migration is unsupported Andrew Morton
2020-12-15  3:13 ` [patch 171/200] mm: migrate: remove unused parameter in migrate_vma_insert_page() Andrew Morton
2020-12-15  3:13 ` [patch 172/200] mm/cma.c: remove redundant cma_mutex lock Andrew Morton
2020-12-15  3:13 ` [patch 173/200] mm: cma: improve pr_debug log in cma_release() Andrew Morton
2020-12-15  3:13 ` [patch 174/200] mm, page_alloc: do not rely on the order of page_poison and init_on_alloc/free parameters Andrew Morton
2020-12-15  3:13 ` Andrew Morton [this message]
2020-12-15  3:13 ` [patch 176/200] kernel/power: allow hibernation with page_poison sanity checking Andrew Morton
2020-12-15  3:13 ` [patch 177/200] mm, page_poison: remove CONFIG_PAGE_POISONING_NO_SANITY Andrew Morton
2020-12-15  3:13 ` [patch 178/200] mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO Andrew Morton
2020-12-15  3:13 ` [patch 179/200] userfaultfd: add UFFD_USER_MODE_ONLY Andrew Morton
2020-12-15  3:13 ` [patch 180/200] userfaultfd: add user-mode only option to unprivileged_userfaultfd sysctl knob Andrew Morton
2020-12-15  3:13 ` [patch 181/200] userfaultfd: selftests: make __{s,u}64 format specifiers portable Andrew Morton
2020-12-15  3:14 ` [patch 182/200] userfaultfd/selftests: always dump something in modes Andrew Morton
2020-12-15  3:14 ` [patch 183/200] userfaultfd/selftests: fix retval check for userfaultfd_open() Andrew Morton
2020-12-15  3:14 ` [patch 184/200] userfaultfd/selftests: hint the test runner on required privilege Andrew Morton
2020-12-15  3:14 ` [patch 185/200] mm/zswap: make struct kernel_param_ops definitions const Andrew Morton
2020-12-15  3:14 ` [patch 186/200] mm/zswap: fix passing zero to 'PTR_ERR' warning Andrew Morton
2020-12-15  3:14 ` [patch 187/200] mm/zswap: move to use crypto_acomp API for hardware acceleration Andrew Morton
2020-12-15  3:14 ` [patch 188/200] mm/zsmalloc.c: rework the list_add code in insert_zspage() Andrew Morton
2020-12-15  3:14 ` [patch 189/200] mm/process_vm_access: remove redundant initialization of iov_r Andrew Morton
2020-12-15  3:14 ` [patch 190/200] zram: support page writeback Andrew Morton
2020-12-15  3:14 ` [patch 191/200] zram: add stat to gather incompressible pages since zram set up Andrew Morton
2020-12-15  3:14 ` [patch 192/200] zram: break the strict dependency from lzo Andrew Morton
2020-12-15  3:14 ` [patch 193/200] mm: fix kernel-doc markups Andrew Morton
2020-12-15  3:14 ` [patch 194/200] mm: use sysfs_emit for struct kobject * uses Andrew Morton
2020-12-15  3:14 ` [patch 195/200] mm: huge_memory: convert remaining use of sprintf to sysfs_emit and neatening Andrew Morton
2020-12-15  3:14 ` [patch 196/200] mm:backing-dev: use sysfs_emit in macro defining functions Andrew Morton
2020-12-15  3:14 ` [patch 197/200] mm: shmem: convert shmem_enabled_show to use sysfs_emit_at Andrew Morton
2020-12-15  3:14 ` [patch 198/200] mm: slub: convert sysfs sprintf family to sysfs_emit/sysfs_emit_at Andrew Morton
2020-12-15  3:15 ` [patch 199/200] mm: fix fall-through warnings for Clang Andrew Morton
2020-12-15  3:15 ` [patch 200/200] mm: cleanup kstrto*() usage Andrew Morton
2020-12-15  3:25 ` incoming Linus Torvalds
2020-12-15  3:30   ` incoming Linus Torvalds
2020-12-15 14:04     ` incoming Konstantin Ryabitsev

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