From: Christoph Hellwig <hch@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Jaegeuk Kim <jaegeuk@kernel.org>,
Linux F2FS Dev Mailing List
<linux-f2fs-devel@lists.sourceforge.net>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Waiman Long <longman@redhat.com>
Subject: Re: [f2fs-dev] [GIT PULL] f2fs for 5.18
Date: Wed, 23 Mar 2022 00:33:26 -0700 [thread overview]
Message-ID: <YjrNRpbo/i3tgbAA@infradead.org> (raw)
In-Reply-To: <CAHk-=wgsmvoJFKFWxQ2orEVUOWH1agk9iUNZ=-DFh5OXZL=Ldw@mail.gmail.com>
On Tue, Mar 22, 2022 at 10:22:50AM -0700, Linus Torvalds wrote:
> On Mon, Mar 21, 2022 at 1:39 PM Jaegeuk Kim <jaegeuk@kernel.org> wrote:
> >
> > In this cycle, f2fs has some performance improvements for Android workloads such
> > as using read-unfair rwsems [...]
>
> I've pulled this, but that read-unfair rwsem code looks incredibly
> dodgy. Doing your own locking is always a bad sign, and it ahs
> traditionally come back to bite us pretty much every time. At least it
> uses real lock primitives, just in a really odd way.
FYI, Peter and I both pointed this out when the patches were posted
and NAKed the patch, but the feedback was ignored.
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next prev parent reply other threads:[~2022-03-23 7:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-21 20:39 [f2fs-dev] [GIT PULL] f2fs for 5.18 Jaegeuk Kim
2022-03-22 17:22 ` Linus Torvalds
2022-03-22 17:37 ` Waiman Long
2022-03-22 17:50 ` Linus Torvalds
2022-03-22 20:58 ` Jaegeuk Kim
2022-06-15 20:13 ` Pavel Machek
2022-06-16 17:02 ` Jaegeuk Kim
2022-03-23 0:34 ` Tim Murray via Linux-f2fs-devel
2022-03-23 2:03 ` Linus Torvalds
2022-03-23 16:26 ` Jaegeuk Kim
2022-03-23 17:06 ` Linus Torvalds
2022-03-23 21:21 ` Jaegeuk Kim
2022-03-23 7:33 ` Christoph Hellwig [this message]
2022-03-23 16:48 ` Jaegeuk Kim
2022-03-23 16:49 ` Christoph Hellwig
2022-03-23 17:00 ` Jaegeuk Kim
2022-03-23 19:28 ` Waiman Long
2022-03-23 21:25 ` Jaegeuk Kim
2022-03-22 18:32 ` pr-tracker-bot
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