From: Barry Song <baohua@kernel.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: akpm@linux-foundation.org, bhe@redhat.com, chentao@kylinos.cn,
chrisl@kernel.org, david@kernel.org, jack@suse.cz,
kasong@tencent.com, kunwu.chan@gmail.com, liam@infradead.org,
lianux.mm@gmail.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, liyangouwen1@oppo.com,
ljs@kernel.org, loongarch@lists.linux.dev, mhocko@suse.com,
nphamcs@gmail.com, nzzhao@126.com, pfalcato@suse.de,
rppt@kernel.org, shikemeng@huaweicloud.com, surenb@google.com,
vbabka@kernel.org, wanglian@kylinos.cn, youngjun.park@lge.com
Subject: Re: [PATCH v2 0/5] mm: reduce mmap_lock contention and improve page fault performance
Date: Fri, 22 May 2026 21:36:47 +0800 [thread overview]
Message-ID: <CAGsJ_4zQuJx1reJxgV387Gh0AqWF0KdoFn9KahQ1BNLPRm57TQ@mail.gmail.com> (raw)
In-Reply-To: <ahBVh4NM2uoyhPNm@casper.infradead.org>
On Fri, May 22, 2026 at 9:09 PM Matthew Wilcox <willy@infradead.org> wrote:
>
> On Fri, May 22, 2026 at 10:33:05AM +0800, Barry Song (Xiaomi) wrote:
> > need to touch `filemap.c` at all (probably because you are already
> > maintaining `filemap.c` perfectly):
>
> I'm going to give you one chance to apologise for that.
Apologies if my wording caused any misunderstanding.
That was not my intention at all.
What I meant is that filemap.c already has a very
solid design.
For memory.c, I had to touch several places for the
blacklist; otherwise, the kernel would hang.
But for filemap.c, I basically didn't need to touch
anything, and preliminary testing shows no issues after
moving it from the whitelist to the blacklist. This is
probably because the current filemap.c design is
already handling some aspects really well.
That is all I meant.
next prev parent reply other threads:[~2026-05-22 13:37 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-30 4:04 Barry Song (Xiaomi)
2026-04-30 4:04 ` [PATCH v2 1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O Barry Song (Xiaomi)
2026-04-30 4:04 ` [PATCH v2 2/5] mm/swapin: Retry swapin " Barry Song (Xiaomi)
2026-04-30 4:04 ` [PATCH v2 3/5] mm: Move folio_lock_or_retry() and drop __folio_lock_or_retry() Barry Song (Xiaomi)
2026-04-30 4:04 ` [PATCH v2 4/5] mm: Don't retry page fault if folio is uptodate during swap-in Barry Song (Xiaomi)
2026-04-30 12:35 ` Matthew Wilcox
2026-05-01 16:11 ` Matthew Wilcox
2026-04-30 4:04 ` [PATCH v2 5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults Barry Song (Xiaomi)
2026-04-30 12:37 ` [PATCH v2 0/5] mm: reduce mmap_lock contention and improve page fault performance Matthew Wilcox
2026-04-30 22:49 ` Barry Song
2026-05-01 14:56 ` Matthew Wilcox
2026-05-01 17:44 ` Barry Song
2026-05-01 17:57 ` Matthew Wilcox
2026-05-01 18:25 ` Barry Song
2026-05-01 19:39 ` Matthew Wilcox
2026-05-03 20:39 ` Barry Song
2026-05-03 13:13 ` Jan Kara
2026-05-03 19:55 ` Barry Song
2026-05-04 13:03 ` Jan Kara
2026-05-04 13:35 ` Barry Song
2026-05-04 14:15 ` Barry Song
2026-05-17 8:45 ` Barry Song
2026-05-18 9:46 ` Lorenzo Stoakes
2026-05-18 11:25 ` Barry Song
2026-05-18 16:17 ` Matthew Wilcox
2026-05-18 20:50 ` Barry Song
2026-05-18 19:56 ` Suren Baghdasaryan
2026-05-18 21:14 ` Barry Song
2026-05-19 12:45 ` Lorenzo Stoakes
2026-05-19 14:17 ` Liam R. Howlett
2026-05-19 22:01 ` Barry Song
2026-05-20 21:04 ` Matthew Wilcox
2026-05-20 21:14 ` Barry Song
2026-05-20 21:15 ` Matthew Wilcox
2026-05-20 21:35 ` David Hildenbrand (Arm)
2026-05-20 23:37 ` Barry Song
2026-05-22 15:53 ` Lorenzo Stoakes
2026-05-22 21:31 ` Barry Song
2026-06-20 23:48 ` Suren Baghdasaryan
2026-06-21 20:49 ` Matthew Wilcox
2026-06-22 0:15 ` Barry Song
2026-06-22 14:50 ` Liam R. Howlett
2026-06-22 21:35 ` Barry Song
2026-06-23 7:58 ` Hongru Zhang
2026-06-23 8:02 ` David Hildenbrand (Arm)
2026-06-23 10:10 ` Hongru Zhang
2026-05-22 2:33 ` Barry Song (Xiaomi)
2026-05-22 13:09 ` Matthew Wilcox
2026-05-22 13:36 ` Barry Song [this message]
2026-05-22 13:48 ` Barry Song
2026-05-22 15:42 ` Lorenzo Stoakes
2026-05-19 12:53 ` Lorenzo Stoakes
2026-05-19 21:18 ` Barry Song
2026-05-20 7:50 ` Lorenzo Stoakes
2026-05-20 9:07 ` Barry Song
2026-05-20 10:07 ` Lorenzo Stoakes
2026-05-20 16:20 ` Suren Baghdasaryan
2026-05-20 5:51 ` Suren Baghdasaryan
2026-05-22 15:39 ` Lorenzo Stoakes
2026-05-20 10:33 ` David Hildenbrand (Arm)
2026-05-20 12:55 ` Lorenzo Stoakes
2026-05-20 21:39 ` Yang Shi
2026-05-22 15:37 ` Lorenzo Stoakes
2026-05-19 12:43 ` Lorenzo Stoakes
2026-05-18 9:53 ` David Hildenbrand (Arm)
2026-05-19 13:42 ` Lorenzo Stoakes
2026-05-18 21:21 ` Yang Shi
2026-05-19 11:07 ` Barry Song
2026-05-19 13:34 ` Lorenzo Stoakes
2026-05-19 18:50 ` Yang Shi
2026-05-19 20:53 ` Yang Shi
2026-05-19 13:12 ` Lorenzo Stoakes
2026-05-19 13:39 ` Lorenzo Stoakes
2026-05-19 18:41 ` Yang Shi
2026-05-19 21:02 ` Yang Shi
2026-05-20 8:11 ` Lorenzo Stoakes
2026-05-01 15:52 ` Lorenzo Stoakes
2026-05-01 16:06 ` Matthew Wilcox
2026-05-01 17:09 ` Lorenzo Stoakes
2026-05-01 17:59 ` Barry Song
2026-05-20 2:04 ` Hillf Danton
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