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From: Josh Triplett <josh@joshtriplett.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Akemi Yagi <toracat@elrepo.org>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	DJ Delorie <dj@redhat.com>, David Sterba <dsterba@suse.cz>,
	David Howells <dhowells@redhat.com>,
	Eric Biggers <ebiggers@kernel.org>,
	Al Viro <viro@zeniv.linux.org.uk>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH 0/2] pipe: Fixes [ver #2]
Date: Wed, 18 Dec 2019 12:59:02 -0800	[thread overview]
Message-ID: <20191218205731.GA8723@localhost> (raw)
In-Reply-To: <CAHk-=wjnXUUbYikSFba5QqvJoFnO8c_ykXrw9Zz2Lt4SeyeZUQ@mail.gmail.com>

On Mon, Dec 09, 2019 at 10:18:57AM -0800, Linus Torvalds wrote:
> On Mon, Dec 9, 2019 at 9:57 AM Akemi Yagi <toracat@elrepo.org> wrote:
> >
> > In addition to the Fedora make-4.2.1-4.fc27 (1) mentioned by Linus,
> > RHEL 8 make-4.2.1-9.el8 (2) is affected. The patch applied to Fedora
> > make (3) has been confirmed to fix the issue in RHEL's make.
> >
> > Those are the only real-world examples I know of. I have no idea how
> > widespread this thing is...
> 
> Looks like opensuse and ubuntu are also on 4.2.1 according to
> 
>    https://software.opensuse.org/package/make
>    https://packages.ubuntu.com/cosmic/make
> 
> so apparently the bug is almost universal with the big three sharing
> this buggy version.

Debian and Ubuntu have make 4.2.1-1.2, which includes "[SV 51159] Use a
non-blocking read with pselect to avoid hangs." and various other fixes.
https://metadata.ftp-master.debian.org/changelogs/main/m/make-dfsg/make-dfsg_4.2.1-1.2_changelog
So, both Debian and Ubuntu should be fine with the pipe improvements.
(I'm testing that now.)

Is the version of your non-thundering-herd pipe wakeup patch attached to
https://lore.kernel.org/lkml/CAHk-=wicgTacrHUJmSBbW9MYAdMPdrXzULPNqQ3G7+HkLeNf1Q@mail.gmail.com/
still the best version to test performance with?

  parent reply	other threads:[~2019-12-18 20:59 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-05 22:30 [PATCH 0/2] pipe: Fixes [ver #2] David Howells
2019-12-05 22:30 ` [PATCH 1/2] pipe: Remove assertion from pipe_poll() " David Howells
2019-12-05 22:30 ` [PATCH 2/2] pipe: Fix missing mask update after pipe_wait() " David Howells
2019-12-05 23:58   ` Linus Torvalds
2019-12-06 13:56 ` [PATCH 0/2] pipe: Fixes " David Sterba
2019-12-06 17:09   ` Linus Torvalds
2019-12-06 17:42     ` Linus Torvalds
2019-12-06 18:59       ` Linus Torvalds
2019-12-07 21:31         ` Akemi Yagi
2019-12-07 21:31           ` Akemi Yagi
2019-12-08 16:45           ` Akemi Yagi
2019-12-08 18:04             ` Linus Torvalds
2019-12-09  3:07               ` Linus Torvalds
2019-12-06 20:28   ` Linus Torvalds
2019-12-06 21:04     ` Linus Torvalds
2019-12-07  3:50       ` Linus Torvalds
2019-12-07  4:01         ` Linus Torvalds
2019-12-07 22:47         ` Linus Torvalds
2019-12-09  9:53           ` Vincent Guittot
2019-12-09 17:48             ` Linus Torvalds
2019-12-09 17:57               ` Akemi Yagi
2019-12-09 18:18                 ` Linus Torvalds
2019-12-09 18:24                   ` Linus Torvalds
2019-12-18 20:59                   ` Josh Triplett [this message]
2019-12-10  2:58               ` DJ Delorie
2019-12-10 14:38               ` Vincent Guittot
2019-12-10 17:39                 ` Linus Torvalds
2019-12-11 18:09               ` DJ Delorie
2019-12-11 18:59                 ` Linus Torvalds
2019-12-12 10:18           ` Konstantin Khlebnikov
2019-12-18 22:51             ` Linus Torvalds
2019-12-19  0:03               ` Josh Triplett
2019-12-19  0:14                 ` Josh Triplett
2019-12-19  0:51                   ` Linus Torvalds
2019-12-19  0:54                     ` Linus Torvalds
2019-12-19  7:56                   ` David Howells
2019-12-19 16:35                     ` Linus Torvalds
2019-12-11 20:55         ` David Howells
2019-12-12  1:28           ` Linus Torvalds
2019-12-12  7:34           ` David Howells
2019-12-09 14:55       ` David Sterba
2019-12-06 21:26   ` David Howells

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