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From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, bigeasy@linutronix.de,
	brouer@redhat.com, cl@linux.com, efault@gmx.de,
	iamjoonsoo.kim@lge.com, jannh@google.com, linux-mm@kvack.org,
	mgorman@techsingularity.net, mm-commits@vger.kernel.org,
	penberg@kernel.org, quic_qiancai@quicinc.com,
	rientjes@google.com, tglx@linutronix.de,
	torvalds@linux-foundation.org, vbabka@suse.cz
Subject: [patch 001/147] mm, slub: don't call flush_all() from slab_debug_trace_open()
Date: Tue, 07 Sep 2021 19:52:59 -0700	[thread overview]
Message-ID: <20210908025259.BMWcjoHBL%akpm@linux-foundation.org> (raw)
In-Reply-To: <20210907195226.14b1d22a07c085b22968b933@linux-foundation.org>

From: Vlastimil Babka <vbabka@suse.cz>
Subject: mm, slub: don't call flush_all() from slab_debug_trace_open()

Patch series "SLUB: reduce irq disabled scope and make it RT compatible", v6.

This series was initially inspired by Mel's pcplist local_lock rewrite,
and also interest to better understand SLUB's locking and the new
primitives and RT variants and implications.  It makes SLUB compatible
with PREEMPT_RT and generally more preemption-friendly, apparently without
significant regressions, as the fast paths are not affected.

The main changes to SLUB by this series:

* irq disabling is now only done for minimum amount of time needed to protect
  the strict kmem_cache_cpu fields, and as part of spin lock, local lock and
  bit lock operations to make them irq-safe

* SLUB is fully PREEMPT_RT compatible

The series should now be sufficiently tested in both RT and !RT configs,
mainly thanks to Mike.

The RFC/v1 version also got basic performance screening by Mel that didn't
show major regressions.  Mike's testing with hackbench of v2 on !RT
reported negligible differences [6]:

virgin(ish) tip
5.13.0.g60ab3ed-tip
          7,320.67 msec task-clock                #    7.792 CPUs utilized            ( +-  0.31% )
           221,215      context-switches          #    0.030 M/sec                    ( +-  3.97% )
            16,234      cpu-migrations            #    0.002 M/sec                    ( +-  4.07% )
            13,233      page-faults               #    0.002 M/sec                    ( +-  0.91% )
    27,592,205,252      cycles                    #    3.769 GHz                      ( +-  0.32% )
     8,309,495,040      instructions              #    0.30  insn per cycle           ( +-  0.37% )
     1,555,210,607      branches                  #  212.441 M/sec                    ( +-  0.42% )
         5,484,209      branch-misses             #    0.35% of all branches          ( +-  2.13% )

           0.93949 +- 0.00423 seconds time elapsed  ( +-  0.45% )
           0.94608 +- 0.00384 seconds time elapsed  ( +-  0.41% ) (repeat)
           0.94422 +- 0.00410 seconds time elapsed  ( +-  0.43% )

5.13.0.g60ab3ed-tip +slub-local-lock-v2r3
          7,343.57 msec task-clock                #    7.776 CPUs utilized            ( +-  0.44% )
           223,044      context-switches          #    0.030 M/sec                    ( +-  3.02% )
            16,057      cpu-migrations            #    0.002 M/sec                    ( +-  4.03% )
            13,164      page-faults               #    0.002 M/sec                    ( +-  0.97% )
    27,684,906,017      cycles                    #    3.770 GHz                      ( +-  0.45% )
     8,323,273,871      instructions              #    0.30  insn per cycle           ( +-  0.28% )
     1,556,106,680      branches                  #  211.901 M/sec                    ( +-  0.31% )
         5,463,468      branch-misses             #    0.35% of all branches          ( +-  1.33% )

           0.94440 +- 0.00352 seconds time elapsed  ( +-  0.37% )
           0.94830 +- 0.00228 seconds time elapsed  ( +-  0.24% ) (repeat)
           0.93813 +- 0.00440 seconds time elapsed  ( +-  0.47% ) (repeat)

RT configs showed some throughput regressions, but that's expected
tradeoff for the preemption improvements through the RT mutex.  It didn't
prevent the v2 to be incorporated to the 5.13 RT tree [7], leading to
testing exposure and bugfixes.

Before the series, SLUB is lockless in both allocation and free fast
paths, but elsewhere, it's disabling irqs for considerable periods of time
- especially in allocation slowpath and the bulk allocation, where IRQs
are re-enabled only when a new page from the page allocator is needed, and
the context allows blocking.  The irq disabled sections can then include
deactivate_slab() which walks a full freelist and frees the slab back to
page allocator or unfreeze_partials() going through a list of percpu
partial slabs.  The RT tree currently has some patches mitigating these,
but we can do much better in mainline too.

Patches 1-6 are straightforward improvements or cleanups that could exist
outside of this series too, but are prerequsities.

Patches 7-9 are also preparatory code changes without functional changes,
but not so useful without the rest of the series.

Patch 10 simplifies the fast paths on systems with preemption, based on
(hopefully correct) observation that the current loops to verify tid are
unnecessary.

Patches 11-20 focus on reducing irq disabled scope in the allocation
slowpath.

Patch 11 moves disabling of irqs into ___slab_alloc() from its callers,
which are the allocation slowpath, and bulk allocation.  Instead these
callers only disable preemption to stabilize the cpu.  The following
patches then gradually reduce the scope of disabled irqs in
___slab_alloc() and the functions called from there.  As of patch 14, the
re-enabling of irqs based on gfp flags before calling the page allocator
is removed from allocate_slab().  As of patch 17, it's possible to reach
the page allocator (in case of existing slabs depleted) without disabling
and re-enabling irqs a single time.

Patches 21-26 reduce the scope of disabled irqs in functions related to
unfreezing percpu partial slab.

Patch 27 is preparatory.  Patch 28 is adopted from the RT tree and
converts the flushing of percpu slabs on all cpus from using IPI to
workqueue, so that the processing isn't happening with irqs disabled in
the IPI handler.  The flushing is not performance critical so it should be
acceptable.

Patch 29 also comes from RT tree and makes object_map_lock RT compatible.

Patch 30 make slab_lock irq-safe on RT where we cannot rely on having irq
disabled from the list_lock spin lock usage.

Patch 31 changes kmem_cache_cpu->partial handling in put_cpu_partial()
from cmpxchg loop to a short irq disabled section, which is used by all
other code modifying the field.  This addresses a theoretical race
scenario pointed out by Jann, and makes the critical section safe wrt with
RT local_lock semantics after the conversion in patch 35.

Patch 32 changes preempt disable to migrate disable, so that the nested
list_lock spinlock is safe to take on RT.  Because migrate_disable() is a
function call even on !RT, a small set of private wrappers is introduced
to keep using the cheaper preempt_disable() on !PREEMPT_RT configurations.
As of this patch, SLUB should be already compatible with RT's lock
semantics.

Finally, patch 33 changes irq disabled sections that protect
kmem_cache_cpu fields in the slow paths, with a local lock.  However on
PREEMPT_RT it means the lockless fast paths can now preempt slow paths
which don't expect that, so the local lock has to be taken also in the
fast paths and they are no longer lockless.  RT folks seem to not mind
this tradeoff.  The patch also updates the locking documentation in the
file's comment.

[1] https://lore.kernel.org/lkml/20210524233946.20352-1-vbabka@suse.cz/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/tree/patches/0001-mm-sl-au-b-Change-list_lock-to-raw_spinlock_t.patch?h=linux-5.12.y-rt-patches
[3] https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/tree/patches/0004-mm-slub-Move-discard_slab-invocations-out-of-IRQ-off.patch?h=linux-5.12.y-rt-patches
[4] https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/tree/patches/0005-mm-slub-Move-flush_cpu_slab-invocations-__free_slab-.patch?h=linux-5.12.y-rt-patches
[5] https://lore.kernel.org/lkml/20210609113903.1421-1-vbabka@suse.cz/
[6] https://lore.kernel.org/lkml/891dc24e38106f8542f4c72831d52dc1a1863ae8.camel@gmx.de
[7] https://lore.kernel.org/linux-rt-users/87tul5p2fa.ffs@nanos.tec.linutronix.de/
[8] https://lore.kernel.org/lkml/20210729132132.19691-1-vbabka@suse.cz/
[9] https://lore.kernel.org/lkml/20210804120522.GD6464@techsingularity.net/
[10] https://lore.kernel.org/lkml/20210805152000.12817-1-vbabka@suse.cz/
[11] https://lore.kernel.org/all/20210823145826.3857-1-vbabka@suse.cz/
[12] https://lore.kernel.org/all/20210823145826.3857-7-vbabka@suse.cz/
[13] https://lore.kernel.org/all/20210823145826.3857-32-vbabka@suse.cz/
[14] https://lore.kernel.org/linux-mm/1ae902f7-c500-f9e8-1b4f-077beade0f42@suse.cz/
[15] https://lore.kernel.org/linux-mm/CAHk-=wjRfFtnQ5p42s_5Uv8i0U5YKSBpTH++_ZMKZyyvYicYmQ@mail.gmail.com/
[16] https://lore.kernel.org/all/871r6j526m.ffs@tglx/


This patch (of 33):

slab_debug_trace_open() can only be called on caches with SLAB_STORE_USER
flag and as with all slub debugging flags, such caches avoid cpu or percpu
partial slabs altogether, so there's nothing to flush.

Link: https://lkml.kernel.org/r/20210904105003.11688-1-vbabka@suse.cz
Link: https://lkml.kernel.org/r/20210904105003.11688-2-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Qian Cai <quic_qiancai@quicinc.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/slub.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/mm/slub.c~mm-slub-dont-call-flush_all-from-slab_debug_trace_open
+++ a/mm/slub.c
@@ -5825,9 +5825,6 @@ static int slab_debug_trace_open(struct
 	if (!alloc_loc_track(t, PAGE_SIZE / sizeof(struct location), GFP_KERNEL))
 		return -ENOMEM;
 
-	/* Push back cpu slabs */
-	flush_all(s);
-
 	for_each_kmem_cache_node(s, node, n) {
 		unsigned long flags;
 		struct page *page;
_

  reply	other threads:[~2021-09-08  2:53 UTC|newest]

Thread overview: 185+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-08  2:52 incoming Andrew Morton
2021-09-08  2:52 ` Andrew Morton [this message]
2021-09-08  2:53 ` [patch 002/147] mm, slub: allocate private object map for debugfs listings Andrew Morton
2021-09-08  2:53 ` [patch 003/147] mm, slub: allocate private object map for validate_slab_cache() Andrew Morton
2021-09-08  2:53 ` [patch 004/147] mm, slub: don't disable irq for debug_check_no_locks_freed() Andrew Morton
2021-09-08  2:53 ` [patch 005/147] mm, slub: remove redundant unfreeze_partials() from put_cpu_partial() Andrew Morton
2021-09-08  2:53 ` [patch 006/147] mm, slub: extract get_partial() from new_slab_objects() Andrew Morton
2021-09-08  2:53 ` [patch 007/147] mm, slub: dissolve new_slab_objects() into ___slab_alloc() Andrew Morton
2021-09-08  2:53 ` [patch 008/147] mm, slub: return slab page from get_partial() and set c->page afterwards Andrew Morton
2021-09-08  2:53 ` [patch 009/147] mm, slub: restructure new page checks in ___slab_alloc() Andrew Morton
2021-09-08  2:53 ` [patch 010/147] mm, slub: simplify kmem_cache_cpu and tid setup Andrew Morton
2021-09-08  2:53 ` [patch 011/147] mm, slub: move disabling/enabling irqs to ___slab_alloc() Andrew Morton
2021-09-08  2:53 ` [patch 012/147] mm, slub: do initial checks in ___slab_alloc() with irqs enabled Andrew Morton
2021-09-08  2:53 ` [patch 013/147] mm, slub: move disabling irqs closer to get_partial() in ___slab_alloc() Andrew Morton
2021-09-08  2:53 ` [patch 014/147] mm, slub: restore irqs around calling new_slab() Andrew Morton
2021-09-08  2:53 ` [patch 015/147] mm, slub: validate slab from partial list or page allocator before making it cpu slab Andrew Morton
2021-09-08  2:53 ` [patch 016/147] mm, slub: check new pages with restored irqs Andrew Morton
2021-09-08  2:53 ` [patch 017/147] mm, slub: stop disabling irqs around get_partial() Andrew Morton
2021-09-08  2:53 ` [patch 018/147] mm, slub: move reset of c->page and freelist out of deactivate_slab() Andrew Morton
2021-09-08  2:53 ` [patch 019/147] mm, slub: make locking in deactivate_slab() irq-safe Andrew Morton
2021-09-08  2:54 ` [patch 020/147] mm, slub: call deactivate_slab() without disabling irqs Andrew Morton
2021-09-08  2:54 ` [patch 021/147] mm, slub: move irq control into unfreeze_partials() Andrew Morton
2021-09-08  2:54 ` [patch 022/147] mm, slub: discard slabs in unfreeze_partials() without irqs disabled Andrew Morton
2021-09-08  2:54 ` [patch 023/147] mm, slub: detach whole partial list at once in unfreeze_partials() Andrew Morton
2021-09-08  2:54 ` [patch 024/147] mm, slub: separate detaching of partial list in unfreeze_partials() from unfreezing Andrew Morton
2021-09-08  2:54 ` [patch 025/147] mm, slub: only disable irq with spin_lock in __unfreeze_partials() Andrew Morton
2021-09-08  2:54 ` [patch 026/147] mm, slub: don't disable irqs in slub_cpu_dead() Andrew Morton
2021-09-08  2:54 ` [patch 027/147] mm, slab: split out the cpu offline variant of flush_slab() Andrew Morton
2021-09-08  2:54 ` [patch 028/147] mm: slub: move flush_cpu_slab() invocations __free_slab() invocations out of IRQ context Andrew Morton
2021-09-08  2:54 ` [patch 029/147] mm: slub: make object_map_lock a raw_spinlock_t Andrew Morton
2021-09-08  2:54 ` [patch 030/147] mm, slub: make slab_lock() disable irqs with PREEMPT_RT Andrew Morton
2021-09-08  2:54 ` [patch 031/147] mm, slub: protect put_cpu_partial() with disabled irqs instead of cmpxchg Andrew Morton
2021-09-08 13:05   ` Jesper Dangaard Brouer
2021-09-08 13:58     ` Vlastimil Babka
2021-09-08 14:55       ` David Hildenbrand
2021-09-08 14:59         ` David Hildenbrand
2021-09-08 17:14           ` Jesper Dangaard Brouer
2021-09-08 17:24             ` David Hildenbrand
2021-09-08 16:11       ` Jesper Dangaard Brouer
2021-09-08 16:31         ` Linus Torvalds
2021-09-08  2:54 ` [patch 032/147] mm, slub: use migrate_disable() on PREEMPT_RT Andrew Morton
2021-09-08  2:54 ` [patch 033/147] mm, slub: convert kmem_cpu_slab protection to local_lock Andrew Morton
2021-09-08  2:54 ` [patch 034/147] memory-hotplug.rst: remove locking details from admin-guide Andrew Morton
2021-09-08  2:54 ` [patch 035/147] memory-hotplug.rst: complete admin-guide overhaul Andrew Morton
2021-09-08  2:54 ` [patch 036/147] mm: remove pfn_valid_within() and CONFIG_HOLES_IN_ZONE Andrew Morton
2021-09-08  2:54 ` [patch 037/147] mm: memory_hotplug: cleanup after removal of pfn_valid_within() Andrew Morton
2021-09-08  2:54 ` [patch 038/147] mm/memory_hotplug: use "unsigned long" for PFN in zone_for_pfn_range() Andrew Morton
2021-09-08  2:55 ` [patch 039/147] mm/memory_hotplug: remove nid parameter from arch_remove_memory() Andrew Morton
2021-09-08  2:55 ` [patch 040/147] mm/memory_hotplug: remove nid parameter from remove_memory() and friends Andrew Morton
2021-09-08  2:55 ` [patch 041/147] ACPI: memhotplug: memory resources cannot be enabled yet Andrew Morton
2021-09-08  2:55 ` [patch 042/147] mm: track present early pages per zone Andrew Morton
2021-09-08  2:55 ` [patch 043/147] mm/memory_hotplug: introduce "auto-movable" online policy Andrew Morton
2021-09-08  2:55 ` [patch 044/147] drivers/base/memory: introduce "memory groups" to logically group memory blocks Andrew Morton
2021-09-08  2:55 ` [patch 045/147] mm/memory_hotplug: track present pages in memory groups Andrew Morton
2021-09-08  2:55 ` [patch 046/147] ACPI: memhotplug: use a single static memory group for a single memory device Andrew Morton
2021-09-08  2:55 ` [patch 047/147] dax/kmem: use a single static memory group for a single probed unit Andrew Morton
2021-09-08  2:55 ` [patch 048/147] virtio-mem: use a single dynamic memory group for a single virtio-mem device Andrew Morton
2021-09-08  2:55 ` [patch 049/147] mm/memory_hotplug: memory group aware "auto-movable" online policy Andrew Morton
2021-09-08  2:55 ` [patch 050/147] mm/memory_hotplug: improved dynamic " Andrew Morton
2021-09-08  2:55 ` [patch 051/147] mm/memory_hotplug: use helper zone_is_zone_device() to simplify the code Andrew Morton
2021-09-08  2:55 ` [patch 052/147] mm: remove redundant compound_head() calling Andrew Morton
2021-09-08  2:55 ` [patch 053/147] riscv: only select GENERIC_IOREMAP if MMU support is enabled Andrew Morton
2021-09-08  2:56 ` [patch 054/147] mm: move ioremap_page_range to vmalloc.c Andrew Morton
2021-09-08  2:56 ` [patch 055/147] mm: don't allow executable ioremap mappings Andrew Morton
2021-09-08  2:56 ` [patch 056/147] mm/early_ioremap.c: remove redundant early_ioremap_shutdown() Andrew Morton
2021-09-08  2:56 ` [patch 057/147] highmem: don't disable preemption on RT in kmap_atomic() Andrew Morton
2021-09-08  2:56 ` [patch 058/147] mm: in_irq() cleanup Andrew Morton
2021-09-08  2:56 ` [patch 059/147] mm: introduce PAGEFLAGS_MASK to replace ((1UL << NR_PAGEFLAGS) - 1) Andrew Morton
2021-09-08  2:56 ` [patch 060/147] mm/secretmem: use refcount_t instead of atomic_t Andrew Morton
2021-09-08  2:56 ` [patch 061/147] kfence: show cpu and timestamp in alloc/free info Andrew Morton
2021-09-08  2:56 ` [patch 062/147] kfence: test: fail fast if disabled at boot Andrew Morton
2021-09-08  2:56 ` [patch 063/147] mm: introduce Data Access MONitor (DAMON) Andrew Morton
2021-09-08  2:56 ` [patch 064/147] mm/damon/core: implement region-based sampling Andrew Morton
2021-09-08  2:56 ` [patch 065/147] mm/damon: adaptively adjust regions Andrew Morton
2021-09-08  2:56 ` [patch 066/147] mm/idle_page_tracking: make PG_idle reusable Andrew Morton
2021-09-08  2:56 ` [patch 067/147] mm/damon: implement primitives for the virtual memory address spaces Andrew Morton
2021-09-08  2:56 ` [patch 068/147] mm/damon: add a tracepoint Andrew Morton
2021-09-08  2:56 ` [patch 069/147] mm/damon: implement a debugfs-based user space interface Andrew Morton
2021-09-08  2:56 ` [patch 070/147] mm/damon/dbgfs: export kdamond pid to the user space Andrew Morton
2021-09-08  2:57 ` [patch 071/147] mm/damon/dbgfs: support multiple contexts Andrew Morton
2021-09-08  2:57 ` [patch 072/147] Documentation: add documents for DAMON Andrew Morton
2021-09-08  2:57 ` [patch 073/147] mm/damon: add kunit tests Andrew Morton
2021-09-08  2:57 ` [patch 074/147] mm/damon: add user space selftests Andrew Morton
2021-09-08  2:57 ` [patch 075/147] MAINTAINERS: update for DAMON Andrew Morton
2021-09-08  2:57 ` [patch 076/147] alpha: agp: make empty macros use do-while-0 style Andrew Morton
2021-09-08  2:57 ` [patch 077/147] alpha: pci-sysfs: fix all kernel-doc warnings Andrew Morton
2021-09-08  2:57 ` [patch 078/147] percpu: remove export of pcpu_base_addr Andrew Morton
2021-09-08  2:57 ` [patch 079/147] fs/proc/kcore.c: add mmap interface Andrew Morton
2021-09-08 18:13   ` Linus Torvalds
     [not found]     ` <fab939c0-42c1-f6ee-f7f8-14280cb5b411@bytedance.com>
2021-09-09 17:32       ` [External] " Linus Torvalds
2021-09-09 17:34         ` Linus Torvalds
2021-09-10  3:18           ` Feng Zhou
2021-09-10 10:08   ` David Hildenbrand
2021-09-10 12:00     ` Mike Rapoport
2021-09-10 12:02       ` David Hildenbrand
2021-09-08  2:57 ` [patch 080/147] proc: stop using seq_get_buf in proc_task_name Andrew Morton
2021-09-08  2:57 ` [patch 081/147] connector: send event on write to /proc/[pid]/comm Andrew Morton
2021-09-08  2:57 ` [patch 082/147] arch: Kconfig: fix spelling mistake "seperate" -> "separate" Andrew Morton
2021-09-08  2:57 ` [patch 083/147] include/linux/once.h: fix trivia typo Not -> Note Andrew Morton
2021-09-08  2:57 ` [patch 084/147] units: change from 'L' to 'UL' Andrew Morton
2021-09-08  2:57 ` [patch 085/147] units: add the HZ macros Andrew Morton
2021-09-08  2:57 ` [patch 086/147] thermal/drivers/devfreq_cooling: use " Andrew Morton
2021-09-08  2:57 ` [patch 087/147] devfreq: " Andrew Morton
2021-09-08  2:57 ` [patch 088/147] iio/drivers/as73211: " Andrew Morton
2021-09-08  2:58 ` [patch 089/147] hwmon/drivers/mr75203: " Andrew Morton
2021-09-08  2:58 ` [patch 090/147] iio/drivers/hid-sensor: " Andrew Morton
2021-09-08  2:58 ` [patch 091/147] i2c/drivers/ov02q10: " Andrew Morton
2021-09-08  2:58 ` [patch 092/147] mtd/drivers/nand: " Andrew Morton
2021-09-08  6:39   ` Miquel Raynal
2021-09-08  2:58 ` [patch 093/147] phy/drivers/stm32: " Andrew Morton
2021-09-08  2:58 ` [patch 094/147] kernel/acct.c: use dedicated helper to access rlimit values Andrew Morton
2021-09-08  2:58 ` [patch 095/147] profiling: fix shift-out-of-bounds bugs Andrew Morton
2021-09-08  2:58 ` [patch 096/147] MAINTAINERS: update ClangBuiltLinux mailing list Andrew Morton
2021-09-08  2:58 ` [patch 097/147] Documentation/llvm: update " Andrew Morton
2021-09-08  2:58 ` [patch 098/147] Documentation/llvm: update IRC location Andrew Morton
2021-09-08  2:58 ` [patch 099/147] math: make RATIONAL tristate Andrew Morton
2021-09-08  2:58 ` [patch 100/147] math: RATIONAL_KUNIT_TEST should depend on RATIONAL instead of selecting it Andrew Morton
2021-09-08  2:58 ` [patch 101/147] lib/string: optimized memcpy Andrew Morton
2021-09-08 18:26   ` Linus Torvalds
2021-09-08  2:58 ` [patch 102/147] lib/string: optimized memmove Andrew Morton
2021-09-08 18:29   ` Linus Torvalds
2021-09-09  8:28     ` David Laight
2021-09-08  2:58 ` [patch 103/147] lib/string: optimized memset Andrew Morton
2021-09-08 18:34   ` Linus Torvalds
2021-09-09 10:27     ` Matteo Croce
2021-09-08  2:58 ` [patch 104/147] lib/test: convert test_sort.c to use KUnit Andrew Morton
2021-09-08  2:58 ` [patch 105/147] lib/dump_stack: correct kernel-doc notation Andrew Morton
2021-09-08  2:58 ` [patch 106/147] lib/iov_iter.c: fix kernel-doc warnings Andrew Morton
2021-09-08  2:58 ` [patch 107/147] bitops: protect find_first_{,zero}_bit properly Andrew Morton
2021-09-08  2:59 ` [patch 108/147] bitops: move find_bit_*_le functions from le.h to find.h Andrew Morton
2021-09-08 18:37   ` Linus Torvalds
2021-09-08 19:38     ` Yury Norov
2021-09-08 19:46       ` Linus Torvalds
2021-09-08 19:49       ` Andrew Morton
2021-09-08 19:56         ` Linus Torvalds
2021-09-08 20:08           ` Linus Torvalds
2021-09-08 20:16         ` Yury Norov
2021-09-08  2:59 ` [patch 109/147] include: move find.h from asm_generic to linux Andrew Morton
2021-09-08  2:59 ` [patch 110/147] arch: remove GENERIC_FIND_FIRST_BIT entirely Andrew Morton
2021-09-08  2:59 ` [patch 111/147] lib: add find_first_and_bit() Andrew Morton
2021-09-08  2:59 ` [patch 112/147] cpumask: use find_first_and_bit() Andrew Morton
2021-09-08  2:59 ` [patch 113/147] all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriate Andrew Morton
2021-09-08  2:59 ` [patch 114/147] tools: sync tools/bitmap with mother linux Andrew Morton
2021-09-08  2:59 ` [patch 115/147] cpumask: replace cpumask_next_* with cpumask_first_* where appropriate Andrew Morton
2021-09-08  2:59 ` [patch 116/147] include/linux: move for_each_bit() macros from bitops.h to find.h Andrew Morton
2021-09-08  2:59 ` [patch 117/147] find: micro-optimize for_each_{set,clear}_bit() Andrew Morton
2021-09-08  2:59 ` [patch 118/147] bitops: replace for_each_*_bit_from() with for_each_*_bit() where appropriate Andrew Morton
2021-09-08  2:59 ` [patch 119/147] tools: rename bitmap_alloc() to bitmap_zalloc() Andrew Morton
2021-09-08  2:59 ` [patch 120/147] mm/percpu: micro-optimize pcpu_is_populated() Andrew Morton
2021-09-08  2:59 ` [patch 121/147] bitmap: unify find_bit operations Andrew Morton
2021-09-08  2:59 ` [patch 122/147] lib: bitmap: add performance test for bitmap_print_to_pagebuf Andrew Morton
2021-09-08  2:59 ` [patch 123/147] vsprintf: rework bitmap_list_string Andrew Morton
2021-09-08  2:59 ` [patch 124/147] checkpatch: support wide strings Andrew Morton
2021-09-08  2:59 ` [patch 125/147] checkpatch: make email address check case insensitive Andrew Morton
2021-09-08  2:59 ` [patch 126/147] checkpatch: improve GIT_COMMIT_ID test Andrew Morton
2021-09-08  3:00 ` [patch 127/147] fs/epoll: use a per-cpu counter for user's watches count Andrew Morton
2021-09-08  3:00 ` [patch 128/147] init: move usermodehelper_enable() to populate_rootfs() Andrew Morton
2021-09-08 15:44   ` Luis Chamberlain
2021-09-10  8:12     ` Rasmus Villemoes
2021-09-10 17:47       ` H. Peter Anvin
2021-09-10 17:51       ` Luis Chamberlain
2021-09-08  3:00 ` [patch 130/147] nilfs2: fix memory leak in nilfs_sysfs_create_device_group Andrew Morton
2021-09-08  3:00 ` [patch 131/147] nilfs2: fix NULL pointer in nilfs_##name##_attr_release Andrew Morton
2021-09-08  3:00 ` [patch 132/147] nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group Andrew Morton
2021-09-08  3:00 ` [patch 133/147] nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group Andrew Morton
2021-09-08  3:00 ` [patch 134/147] nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group Andrew Morton
2021-09-08  3:00 ` [patch 135/147] nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group Andrew Morton
2021-09-08  3:00 ` [patch 136/147] nilfs2: use refcount_dec_and_lock() to fix potential UAF Andrew Morton
2021-09-24 10:35   ` Pavel Machek
2021-09-24 11:09     ` Ryusuke Konishi
2021-09-24 12:12   ` Matthew Wilcox
2021-09-24 15:09     ` Ryusuke Konishi
2021-09-08  3:00 ` [patch 137/147] fs/coredump.c: log if a core dump is aborted due to changed file permissions Andrew Morton
2021-09-08  3:00 ` [patch 138/147] coredump: fix memleak in dump_vma_snapshot() Andrew Morton
2021-09-08  3:00 ` [patch 139/147] kernel/fork.c: unexport get_{mm,task}_exe_file Andrew Morton
2021-09-08  3:00 ` [patch 140/147] pid: cleanup the stale comment mentioning pidmap_init() Andrew Morton
2021-09-08  3:00 ` [patch 141/147] prctl: allow to setup brk for et_dyn executables Andrew Morton
2021-09-08  3:00 ` [patch 142/147] configs: remove the obsolete CONFIG_INPUT_POLLDEV Andrew Morton
2021-09-08  3:00 ` [patch 143/147] Kconfig.debug: drop selecting non-existing HARDLOCKUP_DETECTOR_ARCH Andrew Morton
2021-09-08  3:00 ` [patch 144/147] selftests/memfd: remove unused variable Andrew Morton
2021-09-08  3:00 ` [patch 145/147] ipc: replace costly bailout check in sysvipc_find_ipc() Andrew Morton
2021-09-08  3:00 ` [patch 146/147] mm/workingset: correct kernel-doc notations Andrew Morton
2021-09-08  3:00 ` [patch 147/147] scripts: check_extable: fix typo in user error message Andrew Morton
2021-09-08  3:16 ` [patch 129/147] trap: cleanup trap_init() Andrew Morton
2021-09-08  8:57 ` incoming Vlastimil Babka

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