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From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, cai@redhat.com, cl@linux.com,
	david@redhat.com, iamjoonsoo.kim@lge.com, linux-mm@kvack.org,
	mhocko@kernel.org, mm-commits@vger.kernel.org,
	penberg@kernel.org, rientjes@google.com,
	torvalds@linux-foundation.org, vbabka@suse.cz,
	vdavydov.dev@gmail.com
Subject: [patch 019/173] mm, slab, slub: stop taking memory hotplug lock
Date: Wed, 24 Feb 2021 12:01:12 -0800
Message-ID: <20210224200112.lvAMjFt4C%akpm@linux-foundation.org> (raw)
In-Reply-To: <20210224115824.1e289a6895087f10c41dd8d6@linux-foundation.org>

From: Vlastimil Babka <vbabka@suse.cz>
Subject: mm, slab, slub: stop taking memory hotplug lock

Since commit 03afc0e25f7f ("slab: get_online_mems for
kmem_cache_{create,destroy,shrink}") we are taking memory hotplug lock for
SLAB and SLUB when creating, destroying or shrinking a cache.  It is quite
a heavy lock and it's best to avoid it if possible, as we had several
issues with lockdep complaining about ordering in the past, see e.g. 
e4f8e513c3d3 ("mm/slub: fix a deadlock in show_slab_objects()").

The problem scenario in 03afc0e25f7f (solved by the memory hotplug lock)
can be summarized as follows: while there's slab_mutex synchronizing new
kmem cache creation and SLUB's MEM_GOING_ONLINE callback
slab_mem_going_online_callback(), we may miss creation of kmem_cache_node
for the hotplugged node in the new kmem cache, because the hotplug
callback doesn't yet see the new cache, and cache creation in
init_kmem_cache_nodes() only inits kmem_cache_node for nodes in the
N_NORMAL_MEMORY nodemask, which however may not yet include the new node,
as that happens only later after the MEM_GOING_ONLINE callback.

Instead of using get/put_online_mems(), the problem can be solved by SLUB
maintaining its own nodemask of nodes for which it has allocated the
per-node kmem_cache_node structures.  This nodemask would generally mirror
the N_NORMAL_MEMORY nodemask, but would be updated only in under SLUB's
control in its memory hotplug callbacks under the slab_mutex.  This patch
adds such nodemask and its handling.

Commit 03afc0e25f7f mentiones "issues like [the one above]", but there
don't appear to be further issues.  All the paths (shared for SLAB and
SLUB) taking the memory hotplug locks are also taking the slab_mutex,
except kmem_cache_shrink() where 03afc0e25f7f replaced slab_mutex with
get/put_online_mems().

We however cannot simply restore slab_mutex in kmem_cache_shrink(), as
SLUB can enters the function from a write to sysfs 'shrink' file, thus
holding kernfs lock, and in kmem_cache_create() the kernfs lock is nested
within slab_mutex.  But on closer inspection we don't actually need to
protect kmem_cache_shrink() from hotplug callbacks: While SLUB's
__kmem_cache_shrink() does for_each_kmem_cache_node(), missing a new node
added in parallel hotplug is not fatal, and parallel hotremove does not
free kmem_cache_node's anymore after the previous patch, so use-after free
cannot happen.  The per-node shrinking itself is protected by
n->list_lock.  Same is true for SLAB, and SLOB is no-op.

SLAB also doesn't need the memory hotplug locking, which it only gained by
03afc0e25f7f through the shared paths in slab_common.c.  Its memory
hotplug callbacks are also protected by slab_mutex against races with
these paths.  The problem of SLUB relying on N_NORMAL_MEMORY doesn't apply
to SLAB, as its setup_kmem_cache_nodes relies on N_ONLINE, and the new
node is already set there during the MEM_GOING_ONLINE callback, so no
special care is needed for SLAB.

As such, this patch removes all get/put_online_mems() usage by the slab
subsystem.

Link: https://lkml.kernel.org/r/20210113131634.3671-3-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Qian Cai <cai@redhat.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/slab_common.c |    8 ++------
 mm/slub.c        |   28 +++++++++++++++++++++++++---
 2 files changed, 27 insertions(+), 9 deletions(-)

--- a/mm/slab_common.c~mm-slab-slub-stop-taking-memory-hotplug-lock
+++ a/mm/slab_common.c
@@ -310,7 +310,6 @@ kmem_cache_create_usercopy(const char *n
 	int err;
 
 	get_online_cpus();
-	get_online_mems();
 
 	mutex_lock(&slab_mutex);
 
@@ -360,7 +359,6 @@ kmem_cache_create_usercopy(const char *n
 out_unlock:
 	mutex_unlock(&slab_mutex);
 
-	put_online_mems();
 	put_online_cpus();
 
 	if (err) {
@@ -487,7 +485,6 @@ void kmem_cache_destroy(struct kmem_cach
 		return;
 
 	get_online_cpus();
-	get_online_mems();
 
 	mutex_lock(&slab_mutex);
 
@@ -504,7 +501,6 @@ void kmem_cache_destroy(struct kmem_cach
 out_unlock:
 	mutex_unlock(&slab_mutex);
 
-	put_online_mems();
 	put_online_cpus();
 }
 EXPORT_SYMBOL(kmem_cache_destroy);
@@ -523,10 +519,10 @@ int kmem_cache_shrink(struct kmem_cache
 	int ret;
 
 	get_online_cpus();
-	get_online_mems();
+
 	kasan_cache_shrink(cachep);
 	ret = __kmem_cache_shrink(cachep);
-	put_online_mems();
+
 	put_online_cpus();
 	return ret;
 }
--- a/mm/slub.c~mm-slab-slub-stop-taking-memory-hotplug-lock
+++ a/mm/slub.c
@@ -235,6 +235,14 @@ static inline void stat(const struct kme
 #endif
 }
 
+/*
+ * Tracks for which NUMA nodes we have kmem_cache_nodes allocated.
+ * Corresponds to node_state[N_NORMAL_MEMORY], but can temporarily
+ * differ during memory hotplug/hotremove operations.
+ * Protected by slab_mutex.
+ */
+static nodemask_t slab_nodes;
+
 /********************************************************************
  * 			Core slab cache functions
  *******************************************************************/
@@ -2678,7 +2686,7 @@ static void *___slab_alloc(struct kmem_c
 		 * ignore the node constraint
 		 */
 		if (unlikely(node != NUMA_NO_NODE &&
-			     !node_state(node, N_NORMAL_MEMORY)))
+			     !node_isset(node, slab_nodes)))
 			node = NUMA_NO_NODE;
 		goto new_slab;
 	}
@@ -2689,7 +2697,7 @@ redo:
 		 * same as above but node_match() being false already
 		 * implies node != NUMA_NO_NODE
 		 */
-		if (!node_state(node, N_NORMAL_MEMORY)) {
+		if (!node_isset(node, slab_nodes)) {
 			node = NUMA_NO_NODE;
 			goto redo;
 		} else {
@@ -3592,7 +3600,7 @@ static int init_kmem_cache_nodes(struct
 {
 	int node;
 
-	for_each_node_state(node, N_NORMAL_MEMORY) {
+	for_each_node_mask(node, slab_nodes) {
 		struct kmem_cache_node *n;
 
 		if (slab_state == DOWN) {
@@ -4286,6 +4294,7 @@ static void slab_mem_offline_callback(vo
 		return;
 
 	mutex_lock(&slab_mutex);
+	node_clear(offline_node, slab_nodes);
 	/*
 	 * We no longer free kmem_cache_node structures here, as it would be
 	 * racy with all get_node() users, and infeasible to protect them with
@@ -4335,6 +4344,11 @@ static int slab_mem_going_online_callbac
 		init_kmem_cache_node(n);
 		s->node[nid] = n;
 	}
+	/*
+	 * Any cache created after this point will also have kmem_cache_node
+	 * initialized for the new node.
+	 */
+	node_set(nid, slab_nodes);
 out:
 	mutex_unlock(&slab_mutex);
 	return ret;
@@ -4415,6 +4429,7 @@ void __init kmem_cache_init(void)
 {
 	static __initdata struct kmem_cache boot_kmem_cache,
 		boot_kmem_cache_node;
+	int node;
 
 	if (debug_guardpage_minorder())
 		slub_max_order = 0;
@@ -4422,6 +4437,13 @@ void __init kmem_cache_init(void)
 	kmem_cache_node = &boot_kmem_cache_node;
 	kmem_cache = &boot_kmem_cache;
 
+	/*
+	 * Initialize the nodemask for which we will allocate per node
+	 * structures. Here we don't need taking slab_mutex yet.
+	 */
+	for_each_node_state(node, N_NORMAL_MEMORY)
+		node_set(node, slab_nodes);
+
 	create_boot_cache(kmem_cache_node, "kmem_cache_node",
 		sizeof(struct kmem_cache_node), SLAB_HWCACHE_ALIGN, 0, 0);
 
_

  parent reply index

Thread overview: 197+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-24 19:58 incoming Andrew Morton
2021-02-24 20:00 ` [patch 001/173] hexagon: remove CONFIG_EXPERIMENTAL from defconfigs Andrew Morton
2021-02-24 20:00 ` [patch 002/173] scripts/spelling.txt: increase error-prone spell checking Andrew Morton
2021-02-24 20:00 ` [patch 003/173] scripts/spelling.txt: check for "exeeds" Andrew Morton
2021-02-24 20:00 ` [patch 004/173] scripts/spelling.txt: add "allocted" and "exeeds" typo Andrew Morton
2021-02-24 20:00 ` [patch 005/173] scripts/spelling.txt: add more spellings to spelling.txt Andrew Morton
2021-02-24 20:00 ` [patch 006/173] ntfs: layout.h: delete duplicated words Andrew Morton
2021-02-24 20:00 ` [patch 007/173] ntfs: check for valid standard information attribute Andrew Morton
2021-02-24 20:00 ` [patch 008/173] ocfs2: remove redundant conditional before iput Andrew Morton
2021-02-24 20:00 ` [patch 009/173] ocfs2: clean up some definitions which are not used any more Andrew Morton
2021-02-24 20:00 ` [patch 010/173] ocfs2: fix a use after free on error Andrew Morton
2021-02-24 20:00 ` [patch 011/173] ocfs2: simplify the calculation of variables Andrew Morton
2021-02-24 20:00 ` [patch 012/173] fs: delete repeated words in comments Andrew Morton
2021-02-24 20:00 ` [patch 013/173] ramfs: support O_TMPFILE Andrew Morton
2021-02-24 20:21   ` Christian Brauner
2021-02-24 20:00 ` [patch 014/173] mm, tracing: record slab name for kmem_cache_free() Andrew Morton
2021-02-25  1:37   ` Steven Rostedt
2021-02-25  1:51     ` Linus Torvalds
2021-02-25  1:52       ` Linus Torvalds
2021-02-25  2:03       ` Steven Rostedt
2021-02-25  7:06         ` Jacob Wen
2021-02-25 14:25           ` Steven Rostedt
2021-02-25  2:07     ` Steven Rostedt
2021-02-25  7:07       ` Jacob Wen
2021-02-25 14:31         ` Steven Rostedt
2021-02-25 17:49           ` Linus Torvalds
2021-02-25 17:57             ` Steven Rostedt
2021-02-25 21:48               ` Steven Rostedt
2021-02-26 15:54                 ` Steven Rostedt
2021-02-26  2:02               ` Jacob Wen
2021-02-26  2:56                 ` Steven Rostedt
2021-02-26  3:48                   ` Jacob Wen
2021-02-26 14:15                     ` Steven Rostedt
2021-02-24 20:00 ` [patch 015/173] mm/sl?b.c: remove ctor argument from kmem_cache_flags Andrew Morton
2021-02-24 20:01 ` [patch 016/173] mm/slab: minor coding style tweaks Andrew Morton
2021-02-24 20:01 ` [patch 017/173] mm/slub: disable user tracing for kmemleak caches by default Andrew Morton
2021-02-24 20:01 ` [patch 018/173] mm, slub: stop freeing kmem_cache_node structures on node offline Andrew Morton
2021-02-24 20:01 ` Andrew Morton [this message]
2021-02-24 20:01 ` [patch 020/173] mm, slab, slub: stop taking cpu hotplug lock Andrew Morton
2021-02-24 20:01 ` [patch 021/173] mm, slub: splice cpu and page freelists in deactivate_slab() Andrew Morton
2021-02-24 20:01 ` [patch 022/173] mm, slub: remove slub_memcg_sysfs boot param and CONFIG_SLUB_MEMCG_SYSFS_ON Andrew Morton
2021-02-24 20:01 ` [patch 023/173] mm/slub: minor coding style tweaks Andrew Morton
2021-02-24 20:01 ` [patch 024/173] mm/debug: improve memcg debugging Andrew Morton
2021-02-24 20:01 ` [patch 025/173] mm/debug_vm_pgtable/basic: add validation for dirtiness after write protect Andrew Morton
2021-02-24 20:01 ` [patch 026/173] mm/debug_vm_pgtable/basic: iterate over entire protection_map[] Andrew Morton
2021-02-24 20:01 ` [patch 027/173] mm/page_owner: use helper function zone_end_pfn() to get end_pfn Andrew Morton
2021-02-24 20:01 ` [patch 028/173] mm/filemap: remove unused parameter and change to void type for replace_page_cache_page() Andrew Morton
2021-02-24 20:01 ` [patch 029/173] mm/filemap: don't revert iter on -EIOCBQUEUED Andrew Morton
2021-02-24 20:01 ` [patch 030/173] mm/filemap: rename generic_file_buffered_read subfunctions Andrew Morton
2021-02-24 20:01 ` [patch 031/173] mm/filemap: remove dynamically allocated array from filemap_read Andrew Morton
2021-02-24 20:01 ` [patch 032/173] mm/filemap: convert filemap_get_pages to take a pagevec Andrew Morton
2021-02-24 20:01 ` [patch 033/173] mm/filemap: use head pages in generic_file_buffered_read Andrew Morton
2021-02-24 20:02 ` [patch 034/173] mm/filemap: pass a sleep state to put_and_wait_on_page_locked Andrew Morton
2021-02-24 20:02 ` [patch 035/173] mm/filemap: support readpage splitting a page Andrew Morton
2021-02-24 20:02 ` [patch 036/173] mm/filemap: inline __wait_on_page_locked_async into caller Andrew Morton
2021-02-24 20:02 ` [patch 037/173] mm/filemap: don't call ->readpage if IOCB_WAITQ is set Andrew Morton
2021-02-24 20:02 ` [patch 038/173] mm/filemap: change filemap_read_page calling conventions Andrew Morton
2021-02-24 20:02 ` [patch 039/173] mm/filemap: change filemap_create_page " Andrew Morton
2021-02-24 20:02 ` [patch 040/173] mm/filemap: convert filemap_update_page to return an errno Andrew Morton
2021-02-24 20:02 ` [patch 041/173] mm/filemap: move the iocb checks into filemap_update_page Andrew Morton
2021-02-24 20:02 ` [patch 042/173] mm/filemap: add filemap_range_uptodate Andrew Morton
2021-02-24 20:02 ` [patch 043/173] mm/filemap: split filemap_readahead out of filemap_get_pages Andrew Morton
2021-02-24 20:02 ` [patch 044/173] mm/filemap: restructure filemap_get_pages Andrew Morton
2021-02-24 20:02 ` [patch 045/173] mm/filemap: don't relock the page after calling readpage Andrew Morton
2021-02-24 20:02 ` [patch 046/173] mm/filemap: rename generic_file_buffered_read to filemap_read Andrew Morton
2021-02-24 20:02 ` [patch 047/173] mm/filemap: simplify generic_file_read_iter Andrew Morton
2021-02-24 20:02 ` [patch 048/173] fs/buffer.c: add checking buffer head stat before clear Andrew Morton
2021-02-24 20:02 ` [patch 049/173] mm: backing-dev: Remove duplicated macro definition Andrew Morton
2021-02-24 20:02 ` [patch 050/173] mm/swap_slots.c: remove redundant NULL check Andrew Morton
2021-02-24 20:02 ` [patch 051/173] mm/swapfile.c: fix debugging information problem Andrew Morton
2021-02-24 20:03 ` [patch 052/173] mm/page_io: use pr_alert_ratelimited for swap read/write errors Andrew Morton
2021-02-24 20:03 ` [patch 053/173] mm/swap_state: constify static struct attribute_group Andrew Morton
2021-02-24 20:03 ` [patch 054/173] mm/swap: don't SetPageWorkingset unconditionally during swapin Andrew Morton
2021-02-24 20:03 ` [patch 055/173] mm: memcg/slab: pre-allocate obj_cgroups for slab caches with SLAB_ACCOUNT Andrew Morton
2021-02-24 20:03 ` [patch 056/173] mm: memcontrol: optimize per-lruvec stats counter memory usage Andrew Morton
2021-02-24 20:03 ` [patch 057/173] mm: memcontrol: fix NR_ANON_THPS accounting in charge moving Andrew Morton
2021-02-24 20:03 ` [patch 058/173] mm: memcontrol: convert NR_ANON_THPS account to pages Andrew Morton
2021-02-24 20:03 ` [patch 059/173] mm: memcontrol: convert NR_FILE_THPS " Andrew Morton
2021-02-24 20:03 ` [patch 060/173] mm: memcontrol: convert NR_SHMEM_THPS " Andrew Morton
2021-02-24 20:03 ` [patch 061/173] mm: memcontrol: convert NR_SHMEM_PMDMAPPED " Andrew Morton
2021-02-24 20:03 ` [patch 062/173] mm: memcontrol: convert NR_FILE_PMDMAPPED " Andrew Morton
2021-02-24 20:03 ` [patch 063/173] mm: memcontrol: make the slab calculation consistent Andrew Morton
2021-02-24 20:03 ` [patch 064/173] mm/memcg: revise the using condition of lock_page_lruvec function series Andrew Morton
2021-02-24 20:03 ` [patch 065/173] mm/memcg: remove rcu locking for " Andrew Morton
2021-02-24 20:03 ` [patch 066/173] mm: memcg: add swapcache stat for memcg v2 Andrew Morton
2021-02-24 20:03 ` [patch 067/173] mm: kmem: make __memcg_kmem_(un)charge static Andrew Morton
2021-02-24 20:04 ` [patch 068/173] mm: page_counter: re-layout structure to reduce false sharing Andrew Morton
2021-02-24 20:04 ` [patch 069/173] mm/memcontrol: remove redundant NULL check Andrew Morton
2021-02-24 20:04 ` [patch 070/173] mm: memcontrol: replace the loop with a list_for_each_entry() Andrew Morton
2021-02-24 20:04 ` [patch 071/173] mm/list_lru.c: remove kvfree_rcu_local() Andrew Morton
2021-02-24 20:04 ` [patch 072/173] fs: buffer: use raw page_memcg() on locked page Andrew Morton
2021-02-24 20:04 ` [patch 073/173] mm: memcontrol: fix swap undercounting in cgroup2 Andrew Morton
2021-02-24 20:04 ` [patch 074/173] mm: memcontrol: fix get_active_memcg return value Andrew Morton
2021-02-24 20:04 ` [patch 075/173] mm: memcontrol: fix slub memory accounting Andrew Morton
2021-02-24 20:04 ` [patch 076/173] mm/mmap.c: remove unnecessary local variable Andrew Morton
2021-02-24 20:04 ` [patch 077/173] mm/memory.c: fix potential pte_unmap_unlock pte error Andrew Morton
2021-02-24 20:04 ` [patch 078/173] mm/pgtable-generic.c: simplify the VM_BUG_ON condition in pmdp_huge_clear_flush() Andrew Morton
2021-02-24 20:04 ` [patch 079/173] mm/pgtable-generic.c: optimize " Andrew Morton
2021-02-24 20:04 ` [patch 080/173] mm/memory.c: fix potential pte_unmap_unlock pte error Andrew Morton
2021-02-24 20:04 ` [patch 081/173] mm/mprotect.c: optimize error detection in do_mprotect_pkey() Andrew Morton
2021-02-24 20:04 ` [patch 082/173] mm: rmap: explicitly reset vma->anon_vma in unlink_anon_vmas() Andrew Morton
2021-02-24 20:04 ` [patch 083/173] mm: mremap: unlink anon_vmas when mremap with MREMAP_DONTUNMAP success Andrew Morton
2021-02-24 20:04 ` [patch 084/173] mm/page_reporting: use list_entry_is_head() in page_reporting_cycle() Andrew Morton
2021-02-24 20:05 ` [patch 085/173] vmalloc: remove redundant NULL check Andrew Morton
2021-02-24 20:05 ` [patch 086/173] kasan: prefix global functions with kasan_ Andrew Morton
2021-02-24 20:05 ` [patch 087/173] kasan: clarify HW_TAGS impact on TBI Andrew Morton
2021-02-24 20:05 ` [patch 088/173] kasan: clean up comments in tests Andrew Morton
2021-02-24 20:05 ` [patch 089/173] kasan: add macros to simplify checking test constraints Andrew Morton
2021-02-24 20:05 ` [patch 090/173] kasan: add match-all tag tests Andrew Morton
2021-02-24 20:05 ` [patch 091/173] kasan, arm64: allow using KUnit tests with HW_TAGS mode Andrew Morton
2021-02-24 20:05 ` [patch 092/173] kasan: rename CONFIG_TEST_KASAN_MODULE Andrew Morton
2021-02-24 20:05 ` [patch 093/173] kasan: add compiler barriers to KUNIT_EXPECT_KASAN_FAIL Andrew Morton
2021-02-24 20:05 ` [patch 094/173] kasan: adapt kmalloc_uaf2 test to HW_TAGS mode Andrew Morton
2021-02-24 20:05 ` [patch 095/173] kasan: fix memory corruption in kasan_bitops_tags test Andrew Morton
2021-02-24 20:05 ` [patch 096/173] kasan: move _RET_IP_ to inline wrappers Andrew Morton
2021-02-24 20:05 ` [patch 097/173] kasan: fix bug detection via ksize for HW_TAGS mode Andrew Morton
2021-02-24 20:05 ` [patch 098/173] kasan: add proper page allocator tests Andrew Morton
2021-02-24 20:05 ` [patch 099/173] kasan: add a test for kmem_cache_alloc/free_bulk Andrew Morton
2021-02-24 20:06 ` [patch 100/173] kasan: don't run tests when KASAN is not enabled Andrew Morton
2021-02-24 20:06 ` [patch 101/173] kasan: remove redundant config option Andrew Morton
2021-02-24 20:06 ` [patch 102/173] mm: fix prototype warning from kernel test robot Andrew Morton
2021-02-24 20:06 ` [patch 103/173] mm: rename memmap_init() and memmap_init_zone() Andrew Morton
2021-02-24 20:06 ` [patch 104/173] mm: simplify parater of function memmap_init_zone() Andrew Morton
2021-02-24 20:06 ` [patch 105/173] mm: simplify parameter of setup_usemap() Andrew Morton
2021-02-24 20:06 ` [patch 106/173] mm: remove unneeded local variable in free_area_init_core Andrew Morton
2021-02-24 20:06 ` [patch 107/173] video: fbdev: acornfb: remove free_unused_pages() Andrew Morton
2021-02-24 20:06 ` [patch 108/173] mm: simplify free_highmem_page() and free_reserved_page() Andrew Morton
2021-02-24 20:06 ` [patch 109/173] mm/gfp: add kernel-doc for gfp_t Andrew Morton
2021-02-24 20:06 ` [patch 110/173] mm,hwpoison: send SIGBUS to PF_MCE_EARLY processes on action required events Andrew Morton
2021-02-24 20:06 ` [patch 111/173] mm/huge_memory.c: update tlb entry if pmd is changed Andrew Morton
2021-02-24 20:06 ` [patch 112/173] MIPS: do not call flush_tlb_all when setting pmd entry Andrew Morton
2021-02-24 20:06 ` [patch 113/173] mm/hugetlb: fix potential double free in hugetlb_register_node() error path Andrew Morton
2021-02-24 20:06 ` [patch 114/173] mm/hugetlb.c: fix unnecessary address expansion of pmd sharing Andrew Morton
2021-02-24 20:06 ` [patch 115/173] mm/hugetlb: avoid unnecessary hugetlb_acct_memory() call Andrew Morton
2021-02-24 20:07 ` [patch 116/173] mm/hugetlb: use helper huge_page_order and pages_per_huge_page Andrew Morton
2021-02-24 20:07 ` [patch 117/173] mm/hugetlb: fix use after free when subpool max_hpages accounting is not enabled Andrew Morton
2021-02-24 20:07 ` [patch 118/173] mm/hugetlb: simplify the calculation of variables Andrew Morton
2021-02-24 20:07 ` [patch 119/173] mm/hugetlb: grab head page refcount once for group of subpages Andrew Morton
2021-02-24 20:07 ` [patch 120/173] mm/hugetlb: refactor subpage recording Andrew Morton
2021-02-24 20:07 ` [patch 121/173] mm/hugetlb: fix some comment typos Andrew Morton
2021-02-24 20:07 ` [patch 122/173] mm/hugetlb: remove redundant check in preparing and destroying gigantic page Andrew Morton
2021-02-24 20:07 ` [patch 123/173] mm/hugetlb.c: fix typos in comments Andrew Morton
2021-02-24 20:07 ` [patch 124/173] mm/huge_memory.c: remove unused return value of set_huge_zero_page() Andrew Morton
2021-02-24 20:07 ` [patch 125/173] mm/pmem: avoid inserting hugepage PTE entry with fsdax if hugepage support is disabled Andrew Morton
2021-02-24 20:07 ` [patch 126/173] hugetlb_cgroup: use helper pages_per_huge_page() in hugetlb_cgroup Andrew Morton
2021-02-24 20:07 ` [patch 127/173] mm/hugetlb: use helper function range_in_vma() in page_table_shareable() Andrew Morton
2021-02-24 20:07 ` [patch 128/173] mm/hugetlb: remove unnecessary VM_BUG_ON_PAGE on putback_active_hugepage() Andrew Morton
2021-02-24 20:07 ` [patch 129/173] mm/hugetlb: use helper huge_page_size() to get hugepage size Andrew Morton
2021-02-24 20:07 ` [patch 130/173] hugetlb: fix update_and_free_page contig page struct assumption Andrew Morton
2021-02-24 20:07 ` [patch 131/173] hugetlb: fix copy_huge_page_from_user " Andrew Morton
2021-02-24 20:07 ` [patch 132/173] mm/hugetlb: suppress wrong warning info when alloc gigantic page Andrew Morton
2021-02-24 20:08 ` [patch 133/173] mm/vmscan: __isolate_lru_page_prepare() cleanup Andrew Morton
2021-02-24 20:08 ` [patch 134/173] mm/workingset.c: avoid unnecessary max_nodes estimation in count_shadow_nodes() Andrew Morton
2021-02-24 20:08 ` [patch 135/173] mm/vmscan.c: use add_page_to_lru_list() Andrew Morton
2021-02-24 20:08 ` [patch 136/173] include/linux/mm_inline.h: shuffle lru list addition and deletion functions Andrew Morton
2021-02-24 20:08 ` [patch 137/173] mm: don't pass "enum lru_list" to lru list addition functions Andrew Morton
2021-02-24 20:08 ` [patch 138/173] mm/swap.c: don't pass "enum lru_list" to trace_mm_lru_insertion() Andrew Morton
2021-02-24 20:08 ` [patch 139/173] mm/swap.c: don't pass "enum lru_list" to del_page_from_lru_list() Andrew Morton
2021-02-24 20:08 ` [patch 140/173] mm: add __clear_page_lru_flags() to replace page_off_lru() Andrew Morton
2021-02-24 20:08 ` [patch 141/173] mm: VM_BUG_ON lru page flags Andrew Morton
2021-02-24 20:08 ` [patch 142/173] include/linux/mm_inline.h: fold page_lru_base_type() into its sole caller Andrew Morton
2021-02-24 20:08 ` [patch 143/173] include/linux/mm_inline.h: fold __update_lru_size() " Andrew Morton
2021-02-24 20:08 ` [patch 144/173] mm/vmscan.c: make lruvec_lru_size() static Andrew Morton
2021-02-24 20:08 ` [patch 145/173] mm: workingset: clarify eviction order and distance calculation Andrew Morton
2021-02-24 20:08 ` [patch 146/173] hugetlb: use page.private for hugetlb specific page flags Andrew Morton
2021-02-24 20:08 ` [patch 147/173] hugetlb: convert page_huge_active() HPageMigratable flag Andrew Morton
2021-02-24 20:09 ` [patch 148/173] hugetlb: convert PageHugeTemporary() to HPageTemporary flag Andrew Morton
2021-02-24 20:09 ` [patch 149/173] hugetlb: convert PageHugeFreed to HPageFreed flag Andrew Morton
2021-02-24 20:09 ` [patch 150/173] include/linux/hugetlb.h: add synchronization information for new hugetlb specific flags Andrew Morton
2021-02-24 20:09 ` [patch 151/173] hugetlb: fix uninitialized subpool pointer Andrew Morton
2021-02-24 20:09 ` [patch 152/173] mm/vmscan: restore zone_reclaim_mode ABI Andrew Morton
2021-02-24 20:09 ` [patch 153/173] z3fold: remove unused attribute for release_z3fold_page Andrew Morton
2021-02-24 20:09 ` [patch 154/173] z3fold: simplify the zhdr initialization code in init_z3fold_page() Andrew Morton
2021-02-24 20:09 ` [patch 155/173] mm/compaction: remove rcu_read_lock during page compaction Andrew Morton
2021-02-24 20:09 ` [patch 156/173] mm/compaction: remove duplicated VM_BUG_ON_PAGE !PageLocked Andrew Morton
2021-02-24 20:09 ` [patch 157/173] mm/compaction: correct deferral logic for proactive compaction Andrew Morton
2021-02-24 20:09 ` [patch 158/173] mm/compaction: fix misbehaviors of fast_find_migrateblock() Andrew Morton
2021-02-24 20:09 ` [patch 159/173] mm, compaction: make fast_isolate_freepages() stay within zone Andrew Morton
2021-02-24 20:09 ` [patch 160/173] numa balancing: migrate on fault among multiple bound nodes Andrew Morton
2021-02-24 20:09 ` [patch 161/173] mm/mempolicy: use helper range_in_vma() in queue_pages_test_walk() Andrew Morton
2021-02-24 20:09 ` [patch 162/173] mm, oom: fix a comment in dump_task() Andrew Morton
2021-02-24 20:09 ` [patch 163/173] mm/hugetlb: change hugetlb_reserve_pages() to type bool Andrew Morton
2021-02-24 20:09 ` [patch 164/173] hugetlbfs: remove special hugetlbfs_set_page_dirty() Andrew Morton
2021-02-24 20:10 ` [patch 165/173] hugetlbfs: remove useless BUG_ON(!inode) in hugetlbfs_setattr() Andrew Morton
2021-02-24 20:10 ` [patch 166/173] hugetlbfs: use helper macro default_hstate in init_hugetlbfs_fs Andrew Morton
2021-02-24 20:10 ` [patch 167/173] hugetlbfs: correct obsolete function name in hugetlbfs_read_iter() Andrew Morton
2021-02-24 20:10 ` [patch 168/173] hugetlbfs: remove meaningless variable avoid_reserve Andrew Morton
2021-02-24 20:10 ` [patch 169/173] hugetlbfs: make hugepage size conversion more readable Andrew Morton
2021-02-24 20:10 ` [patch 170/173] hugetlbfs: correct some obsolete comments about inode i_mutex Andrew Morton
2021-02-24 20:10 ` [patch 171/173] hugetlbfs: fix some comment typos Andrew Morton
2021-02-24 20:10 ` [patch 172/173] hugetlbfs: remove unneeded return value of hugetlb_vmtruncate() Andrew Morton
2021-02-24 20:10 ` [patch 173/173] mm/migrate: remove unneeded semicolons Andrew Morton
2021-02-24 21:30 ` incoming Linus Torvalds
2021-02-24 21:37   ` incoming Linus Torvalds
2021-02-25  8:53     ` incoming Arnd Bergmann
2021-02-25  9:12       ` incoming Andrey Ryabinin
2021-02-25 11:07         ` incoming Walter Wu

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