linux-kernel - [GIT PULL] slab fix for 6.19-rc1

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Message-ID: <80e63358-3016-4208-bfc5-242f201d4f94@suse.cz>
Date: Wed, 10 Dec 2025 11:11:08 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 Harry Yoo <harry.yoo@...cle.com>, David Rientjes <rientjes@...gle.com>,
 Christoph Lameter <cl@...two.org>, Roman Gushchin
 <roman.gushchin@...ux.dev>, "linux-mm@...ck.org" <linux-mm@...ck.org>,
 LKML <linux-kernel@...r.kernel.org>
Subject: [GIT PULL] slab fix for 6.19-rc1

Hi Linus,

please pull the slab fix from:

  git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git tags/slab-for-6.19-rc1

Fixing this perf regression in rc1 should save time for people integration-
testing new code on top of it.

Thanks,
Vlastimil

======================================

- A stable fix for performance regression in tests that perform
  kmem_cache_destroy() a lot, due to unnecessarily wide scope
  of kvfree_rcu_barrier(). (Harry Yoo)

----------------------------------------------------------------

The following changes since commit b687034b1a4d85333ced0fe07f67b17276cccdc8:

  Merge tag 'slab-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab (2025-12-03 11:53:47 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git tags/slab-for-6.19-rc1

for you to fetch changes up to 0f35040de59371ad542b915d7b91176c9910dadc:

  mm/slab: introduce kvfree_rcu_barrier_on_cache() for cache destruction (2025-12-07 18:09:54 +0100)

----------------------------------------------------------------
Harry Yoo (1):
      mm/slab: introduce kvfree_rcu_barrier_on_cache() for cache destruction

 include/linux/slab.h |  7 +++++++
 mm/slab.h            |  1 +
 mm/slab_common.c     | 52 +++++++++++++++++++++++++++++++++++--------------
 mm/slub.c            | 55 ++++++++++++++++++++++++++++------------------------
 4 files changed, 75 insertions(+), 40 deletions(-)