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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
	Evgeniy Stepanov <eugenis@google.com>,
	kostyak@google.com, Linux-MM <linux-mm@kvack.org>,
	mm-commits@vger.kernel.org, Peter Collingbourne <pcc@google.com>,
	Peter Xu <peterx@redhat.com>
Subject: Re: [patch 128/192] mm: improve mprotect(R|W) efficiency on pages referenced once
Date: Tue, 29 Jun 2021 10:50:12 -0700	[thread overview]
Message-ID: <CAHk-=wj4KCujAH_oPh40Bkp48amM4MXr+8AcbZ=qd5LF4Q+TDg@mail.gmail.com> (raw)
In-Reply-To: <20210629023959.4ZAFiI8oZ%akpm@linux-foundation.org>

On Mon, Jun 28, 2021 at 7:40 PM Andrew Morton <akpm@linux-foundation.org> wrote:
>
>
> -                       /* Avoid taking write faults for known dirty pages */
> -                       if (dirty_accountable && pte_dirty(ptent) &&
> -                                       (pte_soft_dirty(ptent) ||
> -                                        !(vma->vm_flags & VM_SOFTDIRTY))) {
> +                       if (may_avoid_write_fault(ptent, vma, cp_flags))
>                                 ptent = pte_mkwrite(ptent);
> -                       }

Hmm. I don't think this is correct.

As fat as I can tell, may_avoid_write_fault() doesn't even check if
the vma is writable!

Am I misreading it? Because I think you just made even a shared mmap
with "mprotect(PROT_READ)" turn the pte's writable.

Which is a "slight" security issue.

Maybe the new code is fine, and I'm missing something. The old code
looks strange too, which makes me think that the MM_CP_DIRTY_ACCT test
ends up saving us and depend on VM_WRITE. But it's very much not
obvious.

And even if I _am_ missing something, I really would like a very
obvious and direct test for "this vma is writable", ie maybe a

        if (!(vma->vm_flags & VM_WRITE))
                return false;

at the very top of the function.

And no, "pte_dirty()" is not a reason to make something writable, it
might have started out as a writable mapping, and we dirtied the page,
and we made it read-only. The page stays dirty, but it shouldn't
become writable just because of that.

So please make me get the warm and fuzzies about this code. Because
as-is, it just looks scary.

              Linus

  reply	other threads:[~2021-06-29 17:50 UTC|newest]

Thread overview: 206+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-29  2:32 incoming Andrew Morton
2021-06-29  2:33 ` [patch 001/192] mm/gup: fix try_grab_compound_head() race with split_huge_page() Andrew Morton
2021-06-29  2:33 ` [patch 002/192] mm/page_alloc: fix memory map initialization for descending nodes Andrew Morton
2021-06-29  2:33 ` [patch 003/192] mm/page_alloc: correct return value of populated elements if bulk array is populated Andrew Morton
2021-06-29  2:33 ` [patch 004/192] kthread: switch to new kerneldoc syntax for named variable macro argument Andrew Morton
2021-06-29  2:33 ` [patch 005/192] kthread_worker: fix return value when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync() Andrew Morton
2021-06-29  2:33 ` [patch 006/192] ia64: headers: drop duplicated words Andrew Morton
2021-06-29  2:33 ` [patch 007/192] ia64: mca_drv: fix incorrect array size calculation Andrew Morton
2021-06-29  2:33 ` [patch 008/192] streamline_config.pl: make spacing consistent Andrew Morton
2021-06-29  2:33 ` [patch 009/192] streamline_config.pl: add softtabstop=4 for vim users Andrew Morton
2021-06-29  2:33 ` [patch 010/192] scripts/spelling.txt: add more spellings to spelling.txt Andrew Morton
2021-06-29  2:33 ` [patch 011/192] ntfs: fix validity check for file name attribute Andrew Morton
2021-06-29  2:33 ` [patch 012/192] squashfs: add option to panic on errors Andrew Morton
2021-06-29  2:33 ` [patch 013/192] ocfs2: remove unnecessary INIT_LIST_HEAD() Andrew Morton
2021-06-29  2:34 ` [patch 014/192] ocfs2: fix snprintf() checking Andrew Morton
2021-06-29  2:34 ` [patch 015/192] ocfs2: remove redundant assignment to pointer queue Andrew Morton
2021-06-29  2:34 ` [patch 016/192] ocfs2: remove repeated uptodate check for buffer Andrew Morton
2021-06-29  2:34 ` [patch 017/192] ocfs2: replace simple_strtoull() with kstrtoull() Andrew Morton
2021-06-29  2:34 ` [patch 018/192] ocfs2: remove redundant initialization of variable ret Andrew Morton
2021-06-29  2:34 ` [patch 019/192] kernel: watchdog: modify the explanation related to watchdog thread Andrew Morton
2021-06-29  2:34 ` [patch 020/192] doc: " Andrew Morton
2021-06-29  2:34 ` [patch 021/192] doc: watchdog: modify the doc related to "watchdog/%u" Andrew Morton
2021-06-29  2:34 ` [patch 022/192] slab: use __func__ to trace function name Andrew Morton
2021-06-29  2:34 ` [patch 023/192] kunit: make test->lock irq safe Andrew Morton
2021-06-29  2:34 ` [patch 024/192] mm/slub, kunit: add a KUnit test for SLUB debugging functionality Andrew Morton
2021-06-29  2:34 ` [patch 025/192] slub: remove resiliency_test() function Andrew Morton
2021-06-29  2:34 ` [patch 026/192] mm, slub: change run-time assertion in kmalloc_index() to compile-time Andrew Morton
2021-06-29  2:34 ` [patch 027/192] slub: restore slub_debug=- behavior Andrew Morton
2021-06-29  2:34 ` [patch 028/192] slub: actually use 'message' in restore_bytes() Andrew Morton
2021-06-29  2:34 ` [patch 029/192] slub: indicate slab_fix() uses printf formats Andrew Morton
2021-06-29  2:34 ` [patch 030/192] slub: force on no_hash_pointers when slub_debug is enabled Andrew Morton
2021-06-29  2:34 ` [patch 031/192] mm: slub: move sysfs slab alloc/free interfaces to debugfs Andrew Morton
2021-06-29  2:34 ` [patch 032/192] mm/slub: add taint after the errors are printed Andrew Morton
2021-06-29  2:35 ` [patch 033/192] mm/kmemleak: fix possible wrong memory scanning period Andrew Morton
2021-06-29  2:35 ` [patch 034/192] dax: fix ENOMEM handling in grab_mapping_entry() Andrew Morton
2021-06-29  2:35 ` [patch 035/192] tools/vm/page_owner_sort.c: check malloc() return Andrew Morton
2021-06-29  2:35 ` [patch 036/192] mm/debug_vm_pgtable: ensure THP availability via has_transparent_hugepage() Andrew Morton
2021-06-29  2:35 ` [patch 037/192] mm: mmap_lock: use local locks instead of disabling preemption Andrew Morton
2021-06-29  2:35 ` [patch 038/192] mm/page_reporting: fix code style in __page_reporting_request() Andrew Morton
2021-06-29  2:35 ` [patch 039/192] mm/page_reporting: export reporting order as module parameter Andrew Morton
2021-06-29  2:35 ` [patch 040/192] mm/page_reporting: allow driver to specify reporting order Andrew Morton
2021-06-29  2:35 ` [patch 041/192] virtio_balloon: specify page reporting order if needed Andrew Morton
2021-06-29  2:35 ` [patch 042/192] mm: page-writeback: kill get_writeback_state() comments Andrew Morton
2021-06-29  2:35 ` [patch 043/192] mm/page-writeback: Fix performance when BDI's share of ratio is 0 Andrew Morton
2021-06-29  2:35 ` [patch 044/192] mm/page-writeback: update the comment of Dirty position control Andrew Morton
2021-06-29  2:35 ` [patch 045/192] mm/page-writeback: use __this_cpu_inc() in account_page_dirtied() Andrew Morton
2021-06-29  2:35 ` [patch 046/192] writeback, cgroup: do not switch inodes with I_WILL_FREE flag Andrew Morton
2021-06-29  2:35 ` [patch 047/192] writeback, cgroup: add smp_mb() to cgroup_writeback_umount() Andrew Morton
2021-06-29  2:35 ` [patch 048/192] writeback, cgroup: increment isw_nr_in_flight before grabbing an inode Andrew Morton
2021-06-29  2:35 ` [patch 049/192] writeback, cgroup: switch to rcu_work API in inode_switch_wbs() Andrew Morton
2021-06-29  2:35 ` [patch 050/192] writeback, cgroup: keep list of inodes attached to bdi_writeback Andrew Morton
2021-06-29  2:35 ` [patch 051/192] writeback, cgroup: split out the functional part of inode_switch_wbs_work_fn() Andrew Morton
2021-06-29  2:35 ` [patch 052/192] writeback, cgroup: support switching multiple inodes at once Andrew Morton
2021-06-29  2:36 ` [patch 053/192] writeback, cgroup: release dying cgwbs by switching attached inodes Andrew Morton
2021-06-29  2:36 ` [patch 054/192] fs: unexport __set_page_dirty Andrew Morton
2021-06-29  2:36 ` [patch 055/192] fs: move ramfs_aops to libfs Andrew Morton
2021-06-29  2:36 ` [patch 056/192] mm: require ->set_page_dirty to be explicitly wired up Andrew Morton
2021-06-29  2:36 ` [patch 057/192] mm/writeback: move __set_page_dirty() to core mm Andrew Morton
2021-06-29  2:36 ` [patch 058/192] mm/writeback: use __set_page_dirty in __set_page_dirty_nobuffers Andrew Morton
2021-06-29  2:36 ` [patch 059/192] iomap: use __set_page_dirty_nobuffers Andrew Morton
2021-06-29  2:36 ` [patch 060/192] fs: remove anon_set_page_dirty() Andrew Morton
2021-06-29  2:36 ` [patch 061/192] fs: remove noop_set_page_dirty() Andrew Morton
2021-06-29  2:36 ` [patch 062/192] mm: move page dirtying prototypes from mm.h Andrew Morton
2021-06-29  2:36 ` [patch 063/192] mm/gup_benchmark: support threading Andrew Morton
2021-06-29  2:36 ` [patch 064/192] mm: gup: allow FOLL_PIN to scale in SMP Andrew Morton
2021-06-29  2:36 ` [patch 065/192] mm: gup: pack has_pinned in MMF_HAS_PINNED Andrew Morton
2021-06-29  2:36 ` [patch 066/192] mm: pagewalk: fix walk for hugepage tables Andrew Morton
2021-06-29  2:36 ` [patch 067/192] mm/swapfile: use percpu_ref to serialize against concurrent swapoff Andrew Morton
2021-06-29  2:36 ` [patch 068/192] swap: fix do_swap_page() race with swapoff Andrew Morton
2021-06-29  2:36 ` [patch 069/192] mm/swap: remove confusing checking for non_swap_entry() in swap_ra_info() Andrew Morton
2021-06-29  2:36 ` [patch 070/192] mm/shmem: fix shmem_swapin() race with swapoff Andrew Morton
2021-06-29  2:37 ` [patch 071/192] mm/swapfile: move get_swap_page_of_type() under CONFIG_HIBERNATION Andrew Morton
2021-06-29  2:37 ` [patch 072/192] mm/swap: remove unused local variable nr_shadows Andrew Morton
2021-06-29  2:37 ` [patch 073/192] mm/swap_slots.c: delete meaningless forward declarations Andrew Morton
2021-06-29  2:37 ` [patch 074/192] mm, swap: remove unnecessary smp_rmb() in swap_type_to_swap_info() Andrew Morton
2021-06-29  2:37 ` [patch 075/192] mm: free idle swap cache page after COW Andrew Morton
2021-06-29  2:37 ` [patch 076/192] swap: check mapping_empty() for swap cache before being freed Andrew Morton
2021-06-29  2:37 ` [patch 077/192] mm/memcg: move mod_objcg_state() to memcontrol.c Andrew Morton
2021-06-29  2:37 ` [patch 078/192] mm/memcg: cache vmstat data in percpu memcg_stock_pcp Andrew Morton
2021-06-29  2:37 ` [patch 079/192] mm/memcg: improve refill_obj_stock() performance Andrew Morton
2021-06-29  2:37 ` [patch 080/192] mm/memcg: optimize user context object stock access Andrew Morton
2021-06-29  2:37 ` [patch 081/192] mm: memcg/slab: properly set up gfp flags for objcg pointer array Andrew Morton
2021-06-29  2:37 ` [patch 082/192] mm: memcg/slab: create a new set of kmalloc-cg-<n> caches Andrew Morton
2021-06-29  2:37 ` [patch 083/192] mm: memcg/slab: disable cache merging for KMALLOC_NORMAL caches Andrew Morton
2021-06-29  2:37 ` [patch 084/192] mm: memcontrol: fix root_mem_cgroup charging Andrew Morton
2021-06-29  2:37 ` [patch 085/192] mm: memcontrol: fix page charging in page replacement Andrew Morton
2021-06-29  2:37 ` [patch 086/192] mm: memcontrol: bail out early when !mm in get_mem_cgroup_from_mm Andrew Morton
2021-06-29  2:37 ` [patch 087/192] mm: memcontrol: remove the pgdata parameter of mem_cgroup_page_lruvec Andrew Morton
2021-06-29  2:37 ` [patch 088/192] mm: memcontrol: simplify lruvec_holds_page_lru_lock Andrew Morton
2021-06-29  2:37 ` [patch 089/192] mm: memcontrol: rename lruvec_holds_page_lru_lock to page_matches_lruvec Andrew Morton
2021-06-29  2:38 ` [patch 090/192] mm: memcontrol: simplify the logic of objcg pinning memcg Andrew Morton
2021-06-29  2:38 ` [patch 091/192] mm: memcontrol: move obj_cgroup_uncharge_pages() out of css_set_lock Andrew Morton
2021-06-29  2:38 ` [patch 092/192] mm: vmscan: remove noinline_for_stack Andrew Morton
2021-06-29  2:38 ` [patch 093/192] memcontrol: use flexible-array member Andrew Morton
2021-06-29  2:38 ` [patch 094/192] loop: use worker per cgroup instead of kworker Andrew Morton
2021-06-29  2:38 ` [patch 095/192] mm: charge active memcg when no mm is set Andrew Morton
2021-06-29  2:38 ` [patch 096/192] loop: charge i/o to mem and blk cg Andrew Morton
2021-06-29  2:38 ` [patch 097/192] mm: memcontrol: remove trailing semicolon in macros Andrew Morton
2021-06-29  2:38 ` [patch 098/192] perf: MAP_EXECUTABLE does not indicate VM_MAYEXEC Andrew Morton
2021-06-29  2:38 ` [patch 099/192] binfmt: remove in-tree usage of MAP_EXECUTABLE Andrew Morton
2021-06-29  2:38 ` [patch 100/192] mm: ignore MAP_EXECUTABLE in ksys_mmap_pgoff() Andrew Morton
2021-06-29  2:38 ` [patch 101/192] mm/mmap.c: logic of find_vma_intersection repeated in __do_munmap Andrew Morton
2021-06-29  2:38 ` [patch 102/192] mm/mmap: introduce unlock_range() for code cleanup Andrew Morton
2021-06-29  2:38 ` [patch 103/192] mm/mmap: use find_vma_intersection() in do_mmap() for overlap Andrew Morton
2021-06-29  2:38 ` [patch 104/192] mm/memory.c: fix comment of finish_mkwrite_fault() Andrew Morton
2021-06-29  2:38 ` [patch 105/192] mm: add vma_lookup(), update find_vma_intersection() comments Andrew Morton
2021-06-29  2:38 ` [patch 106/192] drm/i915/selftests: use vma_lookup() in __igt_mmap() Andrew Morton
2021-06-29  2:38 ` [patch 107/192] arch/arc/kernel/troubleshoot: use vma_lookup() instead of find_vma() Andrew Morton
2021-06-29  2:38 ` [patch 108/192] arch/arm64/kvm: use vma_lookup() instead of find_vma_intersection() Andrew Morton
2021-06-29  2:39 ` [patch 109/192] arch/powerpc/kvm/book3s_hv_uvmem: " Andrew Morton
2021-06-29  2:39 ` [patch 110/192] arch/powerpc/kvm/book3s: use vma_lookup() in kvmppc_hv_setup_htab_rma() Andrew Morton
2021-06-29  2:39 ` [patch 111/192] arch/mips/kernel/traps: use vma_lookup() instead of find_vma() Andrew Morton
2021-06-29  2:39 ` [patch 112/192] arch/m68k/kernel/sys_m68k: use vma_lookup() in sys_cacheflush() Andrew Morton
2021-06-29  2:39 ` [patch 113/192] x86/sgx: use vma_lookup() in sgx_encl_find() Andrew Morton
2021-06-29  2:39 ` [patch 114/192] virt/kvm: use vma_lookup() instead of find_vma_intersection() Andrew Morton
2021-06-29  2:39 ` [patch 115/192] vfio: " Andrew Morton
2021-06-29  2:39 ` [patch 116/192] net/ipv5/tcp: use vma_lookup() in tcp_zerocopy_receive() Andrew Morton
2021-06-29  2:39 ` [patch 117/192] drm/amdgpu: use vma_lookup() in amdgpu_ttm_tt_get_user_pages() Andrew Morton
2021-06-29  2:39 ` [patch 118/192] media: videobuf2: use vma_lookup() in get_vaddr_frames() Andrew Morton
2021-06-29  2:39 ` [patch 119/192] misc/sgi-gru/grufault: use vma_lookup() in gru_find_vma() Andrew Morton
2021-06-29  2:39 ` [patch 120/192] kernel/events/uprobes: use vma_lookup() in find_active_uprobe() Andrew Morton
2021-06-29  2:39 ` [patch 121/192] lib/test_hmm: use vma_lookup() in dmirror_migrate() Andrew Morton
2021-06-29  2:39 ` [patch 122/192] mm/ksm: use vma_lookup() in find_mergeable_vma() Andrew Morton
2021-06-29  2:39 ` [patch 123/192] mm/migrate: use vma_lookup() in do_pages_stat_array() Andrew Morton
2021-06-29  2:39 ` [patch 124/192] mm/mremap: use vma_lookup() in vma_to_resize() Andrew Morton
2021-06-29  2:39 ` [patch 125/192] mm/memory.c: use vma_lookup() in __access_remote_vm() Andrew Morton
2021-06-29  2:39 ` [patch 126/192] mm/mempolicy: " Andrew Morton
2021-06-29  2:39 ` [patch 127/192] mm: update legacy flush_tlb_* to use vma Andrew Morton
2021-06-29  2:39 ` [patch 128/192] mm: improve mprotect(R|W) efficiency on pages referenced once Andrew Morton
2021-06-29 17:50   ` Linus Torvalds [this message]
2021-06-29 17:50     ` Linus Torvalds
2021-06-30  0:12     ` Peter Xu
2021-06-30  1:39       ` Peter Xu
2021-06-30  2:25         ` Linus Torvalds
2021-06-30  2:25           ` Linus Torvalds
2021-06-30 16:42           ` Peter Xu
2021-06-30 18:03             ` Linus Torvalds
2021-06-30 18:03               ` Linus Torvalds
2021-07-01  1:27               ` Peter Xu
2021-07-01 18:29                 ` Linus Torvalds
2021-07-01 18:29                   ` Linus Torvalds
2021-07-06  1:24                   ` Peter Xu
2021-06-29  2:40 ` [patch 129/192] h8300: remove unused variable Andrew Morton
2021-06-29  2:40 ` [patch 130/192] mm/dmapool: use DEVICE_ATTR_RO macro Andrew Morton
2021-06-29  2:40 ` [patch 131/192] mm, tracing: unify PFN format strings Andrew Morton
2021-06-29  2:40 ` [patch 132/192] mm/page_alloc: add an alloc_pages_bulk_array_node() helper Andrew Morton
2021-06-29  2:40 ` [patch 133/192] mm/vmalloc: switch to bulk allocator in __vmalloc_area_node() Andrew Morton
2021-06-29  2:40 ` [patch 134/192] mm/vmalloc: print a warning message first on failure Andrew Morton
2021-06-29  2:40 ` [patch 135/192] mm/vmalloc: remove quoted strings split across lines Andrew Morton
2021-06-29  2:40 ` [patch 136/192] mm/vmalloc: fallback to a single page allocator Andrew Morton
2021-06-29  2:40 ` [patch 137/192] mm: vmalloc: add cond_resched() in __vunmap() Andrew Morton
2021-06-29  2:40 ` [patch 138/192] printk: introduce dump_stack_lvl() Andrew Morton
2021-06-29  2:40 ` [patch 139/192] kasan: use dump_stack_lvl(KERN_ERR) to print stacks Andrew Morton
2021-06-29  2:40 ` [patch 140/192] kasan: test: improve failure message in KUNIT_EXPECT_KASAN_FAIL() Andrew Morton
2021-06-29  2:40 ` [patch 141/192] kasan: allow an architecture to disable inline instrumentation Andrew Morton
2021-06-29  2:40 ` [patch 142/192] kasan: allow architectures to provide an outline readiness check Andrew Morton
2021-06-29  2:40 ` [patch 143/192] mm: define default MAX_PTRS_PER_* in include/pgtable.h Andrew Morton
2021-06-29  2:40 ` [patch 144/192] kasan: use MAX_PTRS_PER_* for early shadow tables Andrew Morton
2021-06-29  2:40 ` [patch 145/192] kasan: rename CONFIG_KASAN_SW_TAGS_IDENTIFY to CONFIG_KASAN_TAGS_IDENTIFY Andrew Morton
2021-06-29  2:40 ` [patch 146/192] kasan: integrate the common part of two KASAN tag-based modes Andrew Morton
2021-06-29  2:40 ` [patch 147/192] kasan: add memory corruption identification support for hardware tag-based mode Andrew Morton
2021-06-29  2:41 ` [patch 148/192] mm: report which part of mem is being freed on initmem case Andrew Morton
2021-06-29  2:41 ` [patch 149/192] mm/mmzone.h: simplify is_highmem_idx() Andrew Morton
2021-06-29  2:41 ` [patch 150/192] mm: make __dump_page static Andrew Morton
2021-06-29  2:41 ` [patch 151/192] mm/page_alloc: bail out on fatal signal during reclaim/compaction retry attempt Andrew Morton
2021-06-29  2:41 ` [patch 152/192] mm/debug: factor PagePoisoned out of __dump_page Andrew Morton
2021-06-29  2:41 ` [patch 153/192] mm/page_owner: constify dump_page_owner Andrew Morton
2021-06-29  2:41 ` [patch 154/192] mm: make compound_head const-preserving Andrew Morton
2021-06-29  2:41 ` [patch 155/192] mm: constify get_pfnblock_flags_mask and get_pfnblock_migratetype Andrew Morton
2021-06-29  2:41 ` [patch 156/192] mm: constify page_count and page_ref_count Andrew Morton
2021-06-29  2:41 ` [patch 157/192] mm: optimise nth_page for contiguous memmap Andrew Morton
2021-06-29  2:41 ` [patch 158/192] mm/page_alloc: switch to pr_debug Andrew Morton
2021-06-29  2:41 ` [patch 159/192] kbuild: skip per-CPU BTF generation for pahole v1.18-v1.21 Andrew Morton
2021-06-29  2:41 ` [patch 160/192] mm/page_alloc: split per cpu page lists and zone stats Andrew Morton
2021-06-29  2:41 ` [patch 161/192] mm/page_alloc: convert per-cpu list protection to local_lock Andrew Morton
2021-06-29  2:41 ` [patch 162/192] mm/vmstat: convert NUMA statistics to basic NUMA counters Andrew Morton
2021-06-29  2:41 ` [patch 163/192] mm/vmstat: inline NUMA event counter updates Andrew Morton
2021-06-29  2:41 ` [patch 164/192] mm/page_alloc: batch the accounting updates in the bulk allocator Andrew Morton
2021-06-29  2:41 ` [patch 165/192] mm/page_alloc: reduce duration that IRQs are disabled for VM counters Andrew Morton
2021-06-29  2:41 ` [patch 166/192] mm/page_alloc: explicitly acquire the zone lock in __free_pages_ok Andrew Morton
2021-06-29  2:42 ` [patch 167/192] mm/page_alloc: avoid conflating IRQs disabled with zone->lock Andrew Morton
2021-06-29  2:42 ` [patch 168/192] mm/page_alloc: update PGFREE outside the zone lock in __free_pages_ok Andrew Morton
2021-06-29  2:42 ` [patch 169/192] mm: page_alloc: dump migrate-failed pages only at -EBUSY Andrew Morton
2021-06-29  2:42 ` [patch 170/192] mm/page_alloc: delete vm.percpu_pagelist_fraction Andrew Morton
2021-06-29  2:42 ` [patch 171/192] mm/page_alloc: disassociate the pcp->high from pcp->batch Andrew Morton
2021-06-29  2:42 ` [patch 172/192] mm/page_alloc: adjust pcp->high after CPU hotplug events Andrew Morton
2021-06-29  2:42 ` [patch 173/192] mm/page_alloc: scale the number of pages that are batch freed Andrew Morton
2021-06-29  2:42 ` [patch 174/192] mm/page_alloc: limit the number of pages on PCP lists when reclaim is active Andrew Morton
2021-06-29  2:42 ` [patch 175/192] mm/page_alloc: introduce vm.percpu_pagelist_high_fraction Andrew Morton
2021-06-29  2:42 ` [patch 176/192] mm: drop SECTION_SHIFT in code comments Andrew Morton
2021-06-29  2:42 ` [patch 177/192] mm/page_alloc: improve memmap_pages dbg msg Andrew Morton
2021-06-29  2:42 ` [patch 178/192] mm/page_alloc: fix counting of managed_pages Andrew Morton
2021-06-29  2:42 ` [patch 179/192] mm/page_alloc: move free_the_page Andrew Morton
2021-06-29  2:42 ` [patch 180/192] alpha: remove DISCONTIGMEM and NUMA Andrew Morton
2021-06-29  2:42 ` [patch 181/192] arc: update comment about HIGHMEM implementation Andrew Morton
2021-06-29  2:42 ` [patch 182/192] arc: remove support for DISCONTIGMEM Andrew Morton
2021-06-29  2:42 ` [patch 183/192] m68k: " Andrew Morton
2021-06-29  2:42 ` [patch 184/192] mm: remove CONFIG_DISCONTIGMEM Andrew Morton
2021-06-29  2:42 ` [patch 185/192] arch, mm: remove stale mentions of DISCONIGMEM Andrew Morton
2021-06-29  2:42 ` [patch 186/192] docs: remove description of DISCONTIGMEM Andrew Morton
2021-06-29  2:43 ` [patch 187/192] mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA Andrew Morton
2021-06-29  2:43 ` [patch 188/192] mm: replace CONFIG_FLAT_NODE_MEM_MAP with CONFIG_FLATMEM Andrew Morton
2021-06-29  2:43 ` [patch 189/192] mm/page_alloc: allow high-order pages to be stored on the per-cpu lists Andrew Morton
2021-06-29  2:43 ` [patch 190/192] mm/page_alloc: split pcp->high across all online CPUs for cpuless nodes Andrew Morton
2021-06-29  2:43 ` [patch 191/192] mm,hwpoison: send SIGBUS with error virutal address Andrew Morton
2021-06-29  2:43 ` [patch 192/192] mm,hwpoison: make get_hwpoison_page() call get_any_page() Andrew Morton

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