linux-kernel - [PATCH v2 0/3] rearrange struct slab fields to allow larger rcu

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Date:   Mon,  7 Nov 2022 18:05:51 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Christoph Lameter <cl@...ux.com>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Pekka Enberg <penberg@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>
Cc:     Hyeonggon Yoo <42.hyeyoo@...il.com>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Matthew Wilcox <willy@...radead.org>, paulmck@...nel.org,
        rcu@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        Vlastimil Babka <vbabka@...e.cz>
Subject: [PATCH v2 0/3] rearrange struct slab fields to allow larger rcu_head

Hi,

The previous version (RFC, no cover letter) is here:
https://lore.kernel.org/all/20220826090912.11292-1-vbabka@suse.cz/

Git branch is here:
https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git/log/?h=slab/for-6.2/fit_rcu_head
(also in linux-next since late last week)

The rationale for doing all this is in patch 3 - I hope there are still
plans for the rcu_head debugging, Joel?

The previous version was in linux-next, which brought crash reports due
to causing false positive __PageMovable() tests. There were several
attempts to deal with it, as explained in Patch 2, which is an updated
version of one of those attempts. It hasn't been formally posted and
reviewed yet, hence this posting.

Thanks,
Vlastimil

Vlastimil Babka (3):
  mm/slub: perform free consistency checks before call_rcu
  mm/migrate: make isolate_movable_page() skip slab pages
  mm/sl[au]b: rearrange struct slab fields to allow larger rcu_head

 mm/migrate.c | 15 ++++++++++++---
 mm/slab.c    |  6 +++++-
 mm/slab.h    | 54 +++++++++++++++++++++++++++++++---------------------
 mm/slub.c    | 26 ++++++++++++++-----------
 4 files changed, 64 insertions(+), 37 deletions(-)

-- 
2.38.0