From: Vlastimil Babka <vbabka@suse.cz>
To: "Liam R. Howlett" <Liam.Howlett@Oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
maple-tree@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Matthew Wilcox <willy@infradead.org>,
Suren Baghdasaryan <surenb@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 0/8] Fix VMA tree modification under mmap read lock
Date: Tue, 28 Mar 2023 11:10:58 +0200 [thread overview]
Message-ID: <a017acde-7520-743c-963b-94a23c0f30c8@suse.cz> (raw)
In-Reply-To: <20230327194800.fzqfrxfh3nfmqwgk@revolver>
On 3/27/23 21:48, Liam R. Howlett wrote:
> * Andrew Morton <akpm@linux-foundation.org> [230327 15:35]:
>> On Mon, 27 Mar 2023 14:55:24 -0400 "Liam R. Howlett" <Liam.Howlett@oracle.com> wrote:
>>
>> > These patches have been in -next since next-20230301, and have received
>> > intensive testing in Android as part of the RCU page fault patchset.
>> > They were also sent as part of the "Per-VMA locks" v4 patch series.
>> > Patches 1 to 7 are bug fixes for RCU mode of the tree and patch 8 enables
>> > RCU mode for the tree.
>>
>> What's happening here? I assume you've decided that the first 8
>> patches of the "Per-VMA locks v4" series should be fast-tracked into
>> 6.3-rcX and backported? And we retain the rest of that series for
>> 6.4-rc1?
>
> Yes, they need to be backported and fast tracked to fix the issue syzbot
> found.
Stable usually wants the "mainline first" which means fast tracking first,
then once it's in mainline, they pick it and annotate with mainline commit id.
One question is how Linus would feel about this now for rc5.
Another question is if we should really deviate in the patch 8/8 backport
just because it's not necessary for stable. Generally they would also prefer
not to deviate, unless there's a strong reason.
>>
>> Patch [3/8] hasn't come through to me, to linux-mm or to linux-kernel.
>
> Should arrive shortly, I received it from one of the ML.
>
>
next prev parent reply other threads:[~2023-03-28 9:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-27 18:55 Liam R. Howlett
2023-03-27 18:55 ` [PATCH 1/8] maple_tree: be more cautious about dead nodes Liam R. Howlett
2023-03-27 18:55 ` [PATCH 2/8] maple_tree: detect dead nodes in mas_start() Liam R. Howlett
2023-03-27 18:55 ` [PATCH 3/8] maple_tree: fix freeing of nodes in rcu mode Liam R. Howlett
2023-03-27 18:55 ` [PATCH 4/8] maple_tree: remove extra smp_wmb() from mas_dead_leaves() Liam R. Howlett
2023-03-27 18:55 ` [PATCH 5/8] maple_tree: fix write memory barrier of nodes once dead for RCU mode Liam R. Howlett
2023-03-27 19:05 ` Liam R. Howlett
2023-03-27 19:45 ` Andrew Morton
2023-03-27 18:55 ` [PATCH 6/8] maple_tree: add smp_rmb() to dead node detection Liam R. Howlett
2023-03-27 18:55 ` [PATCH 7/8] maple_tree: add RCU lock checking to rcu callback functions Liam R. Howlett
2023-03-27 18:55 ` [PATCH 8/8] mm: enable maple tree RCU mode by default Liam R. Howlett
2023-03-27 19:38 ` Andrew Morton
2023-03-27 19:43 ` Liam R. Howlett
2023-04-11 1:25 ` kernel test robot
2023-04-11 2:25 ` Matthew Wilcox
2023-03-27 19:35 ` [PATCH 0/8] Fix VMA tree modification under mmap read lock Andrew Morton
2023-03-27 19:48 ` Liam R. Howlett
2023-03-28 9:10 ` Vlastimil Babka [this message]
2023-03-28 13:02 ` Liam R. Howlett
2023-04-03 19:44 ` Liam R. Howlett
2023-04-03 20:19 ` Andrew Morton
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