From: Jeff King <peff@peff.net>
To: Junio C Hamano <gitster@pobox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Johannes Schindelin <Johannes.Schindelin@gmx.de>,
Git Mailing List <git@vger.kernel.org>,
Lars Schneider <larsxschneider@gmail.com>,
Eric Wong <e@80x24.org>
Subject: Re: [PATCH v3 2/3] sha1_file: open window into packfiles with O_CLOEXEC
Date: Mon, 31 Oct 2016 14:05:24 -0400 [thread overview]
Message-ID: <20161031180524.ss37h4njdl3on53m@sigill.intra.peff.net> (raw)
In-Reply-To: <xmqqwpgotncb.fsf@gitster.mtv.corp.google.com>
On Mon, Oct 31, 2016 at 10:55:32AM -0700, Junio C Hamano wrote:
> > So I guess it's possible that it produces a noticeable effect in some
> > cases, but I'm still somewhat doubtful. And actually repacking your
> > repository had a greater effect in every case I measured (in addition to
> > providing other speedups).
>
> Let's keep doubting. I prefer one-step-at-a-time approach to
> things anyway, and what I plan in the near term are:
>
> * use the "open() with O_NOATIME|O_CLOEXEC, gradually losing the
> bits during fallback" approach in the ls/git-open-cloexec topic,
> in order to help ls/filter-process topic be part of the upcoming
> release;
>
> * simplify the logic to the "open(2) with O_CLOEXEC, set O_NOATIME
> with fcntl(2)" in jc/git-open-cloexec~1 after 2.11 ships;
>
> * cook "drop the latter half of setting O_NOATIME" which is at the
> tip of jc/git-open-cloexec in 'next', and while Linus is looking
> the other way ^W^W^W^W^W^W^W after people had chance to complain
> with numbers, merge it to a future release iff it still looked OK
> to drop O_NOATIME thing.
Great, that sounds like a good way to proceed (and if the final step
never happens, no big deal).
-Peff
next prev parent reply other threads:[~2016-10-31 18:05 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-24 18:02 [PATCH v2 0/2] Use CLOEXEC to avoid fd leaks larsxschneider
2016-10-24 18:02 ` [PATCH v2 1/2] sha1_file: open window into packfiles with CLOEXEC larsxschneider
2016-10-25 10:27 ` Johannes Schindelin
2016-10-25 16:58 ` Junio C Hamano
2016-10-24 18:03 ` [PATCH v2 2/2] read-cache: make sure file handles are not inherited by child processes larsxschneider
2016-10-24 18:39 ` Eric Wong
2016-10-24 19:53 ` Junio C Hamano
2016-10-25 10:33 ` Johannes Schindelin
2016-10-25 17:02 ` Junio C Hamano
2016-10-24 19:22 ` Johannes Sixt
2016-10-24 19:53 ` Lars Schneider
2016-10-25 21:39 ` Johannes Sixt
2016-10-24 18:23 ` [PATCH v2 0/2] Use CLOEXEC to avoid fd leaks Junio C Hamano
2016-10-25 11:27 ` Johannes Schindelin
2016-10-25 18:16 ` [PATCH v3 0/3] quick reroll of Lars's git_open() w/ O_CLOEXEC Junio C Hamano
2016-10-25 18:16 ` [PATCH v3 1/3] sha1_file: rename git_open_noatime() to git_open() Junio C Hamano
2016-10-25 18:16 ` [PATCH v3 2/3] sha1_file: open window into packfiles with O_CLOEXEC Junio C Hamano
2016-10-26 4:25 ` Jeff King
2016-10-26 16:23 ` Junio C Hamano
2016-10-26 16:47 ` Jeff King
2016-10-26 17:52 ` Junio C Hamano
2016-10-26 20:17 ` Jeff King
2016-10-26 21:15 ` Junio C Hamano
2016-10-27 10:24 ` Jeff King
2016-10-27 21:49 ` Junio C Hamano
2016-10-27 22:38 ` Linus Torvalds
2016-10-27 22:56 ` Junio C Hamano
2016-10-27 23:09 ` Linus Torvalds
2016-10-27 23:19 ` Linus Torvalds
2016-10-27 23:36 ` Junio C Hamano
2016-10-27 23:44 ` Linus Torvalds
2016-10-28 1:08 ` Junio C Hamano
2016-10-28 2:37 ` Junio C Hamano
2016-10-28 5:51 ` Eric Wong
2016-10-28 11:11 ` Johannes Schindelin
2016-10-28 16:13 ` Linus Torvalds
2016-10-28 16:48 ` Junio C Hamano
2016-10-28 17:38 ` Linus Torvalds
2016-10-28 17:47 ` Junio C Hamano
2016-10-29 1:26 ` Junio C Hamano
2016-10-29 8:25 ` Johannes Schindelin
2016-10-29 17:06 ` Linus Torvalds
2016-10-31 17:37 ` Junio C Hamano
2016-10-31 13:56 ` Jeff King
2016-10-31 17:55 ` Junio C Hamano
2016-10-31 18:05 ` Jeff King [this message]
2016-10-28 13:32 ` Junio C Hamano
2016-10-28 13:33 ` Junio C Hamano
2016-10-28 7:51 ` Jeff King
2016-10-25 18:16 ` [PATCH v3 3/3] read-cache: make sure file handles are not inherited by child processes Junio C Hamano
2016-10-25 21:33 ` Eric Wong
2016-10-25 22:54 ` Junio C Hamano
2016-10-25 21:48 ` [PATCH v3 0/3] quick reroll of Lars's git_open() w/ O_CLOEXEC Lars Schneider
2016-10-25 22:56 ` Junio C Hamano
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