From: Chris Mason <clm@fb.com>
To: Christoph Hellwig <hch@lst.de>,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Junio C Hamano" <gitster@pobox.com>,
"Git Mailing List" <git@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH] enable core.fsyncObjectFiles by default
Date: Sun, 21 Jan 2018 16:32:50 -0500 [thread overview]
Message-ID: <f797983e-1890-d84c-c3c4-87904a0a8135@fb.com> (raw)
In-Reply-To: <20180118162721.GA26078@lst.de>
On 01/18/2018 11:27 AM, Christoph Hellwig wrote:
> [adding Chris to the Cc list - this is about the awful ext3 data=ordered
> behavior of syncing the whole file system data and metadata on each
> fsync]
>
> On Wed, Jan 17, 2018 at 03:57:53PM -0800, Linus Torvalds wrote:
>> On Wed, Jan 17, 2018 at 3:52 PM, Theodore Ts'o <tytso@mit.edu> wrote:
>>>
>>> Well, let's be fair; this is something *ext3* got wrong, and it was
>>> the default file system back them.
>>
>> I'm pretty sure reiserfs and btrfs did too..
>
> I'm pretty sure btrfs never did, and reiserfs at least looks like
> it currently doesn't but I'd have to dig into history to check if
> it ever did.
>
Christoph has this right, btrfs only fsyncs the one file that you've
asked for, and unrelated data/metadata won't be included.
We've seen big fsync stalls on ext4 caused by data=ordered, so it's
still possible to trigger on ext4, but much better than ext3.
I do share Ted's concern about the perf impact of the fsyncs on tons of
loose files, but the defaults should be safety first.
-chris
next prev parent reply other threads:[~2018-01-21 21:34 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-17 18:48 [PATCH] enable core.fsyncObjectFiles by default Christoph Hellwig
2018-01-17 19:04 ` Junio C Hamano
2018-01-17 19:35 ` Christoph Hellwig
2018-01-17 19:35 ` Christoph Hellwig
2018-01-17 20:05 ` Andreas Schwab
2018-01-17 19:37 ` Matthew Wilcox
2018-01-17 19:42 ` Christoph Hellwig
2018-01-17 21:44 ` Ævar Arnfjörð Bjarmason
2018-01-17 22:07 ` Linus Torvalds
2018-01-17 22:25 ` Linus Torvalds
2018-01-17 23:16 ` Ævar Arnfjörð Bjarmason
2018-01-17 23:42 ` Linus Torvalds
2018-01-17 23:52 ` Theodore Ts'o
2018-01-17 23:57 ` Linus Torvalds
2018-01-18 16:27 ` Christoph Hellwig
2018-01-19 19:08 ` Junio C Hamano
2018-01-20 22:14 ` Theodore Ts'o
2018-01-20 22:27 ` Junio C Hamano
2018-01-22 15:09 ` Ævar Arnfjörð Bjarmason
2018-01-22 18:09 ` Theodore Ts'o
2018-01-22 18:09 ` Theodore Ts'o
2018-01-23 0:47 ` Jeff King
2018-01-23 5:45 ` Theodore Ts'o
2018-01-23 5:45 ` Theodore Ts'o
2018-01-23 16:17 ` Jeff King
2018-01-23 0:25 ` Jeff King
2018-01-21 21:32 ` Chris Mason [this message]
2020-09-17 11:06 ` Ævar Arnfjörð Bjarmason
2020-09-17 11:28 ` [RFC PATCH 0/2] should core.fsyncObjectFiles fsync the dir entry + docs Ævar Arnfjörð Bjarmason
2020-09-17 11:28 ` [RFC PATCH 1/2] sha1-file: fsync() loose dir entry when core.fsyncObjectFiles Ævar Arnfjörð Bjarmason
2020-09-17 13:16 ` Jeff King
2020-09-17 15:09 ` Christoph Hellwig
2020-09-17 14:09 ` Christoph Hellwig
2020-09-17 14:55 ` Jeff King
2020-09-17 14:56 ` Christoph Hellwig
2020-09-17 15:37 ` Junio C Hamano
2020-09-17 17:12 ` Jeff King
2020-09-17 20:37 ` Taylor Blau
2020-09-22 10:42 ` Ævar Arnfjörð Bjarmason
2020-09-17 20:21 ` Johannes Sixt
2020-09-22 8:24 ` Ævar Arnfjörð Bjarmason
2020-11-19 11:38 ` Johannes Schindelin
2020-09-17 11:28 ` [RFC PATCH 2/2] core.fsyncObjectFiles: make the docs less flippant Ævar Arnfjörð Bjarmason
2020-09-17 14:12 ` Christoph Hellwig
2020-09-17 15:43 ` Junio C Hamano
2020-09-17 20:15 ` Johannes Sixt
2020-10-08 8:13 ` Johannes Schindelin
2020-10-08 15:57 ` Ævar Arnfjörð Bjarmason
2020-10-08 18:53 ` Junio C Hamano
2020-10-09 10:44 ` Johannes Schindelin
2020-09-17 19:21 ` Marc Branchaud
2020-09-17 14:14 ` [PATCH] enable core.fsyncObjectFiles by default Christoph Hellwig
2020-09-17 15:30 ` Junio C Hamano
2018-01-17 20:55 ` Jeff King
2018-01-17 21:10 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2015-06-23 21:57 [PATCH] Enable " Stefan Beller
2015-06-23 22:21 ` Junio C Hamano
2015-06-23 23:29 ` Theodore Ts'o
2015-06-24 5:32 ` Junio C Hamano
2015-06-24 14:30 ` Theodore Ts'o
2015-06-24 1:07 ` Duy Nguyen
2015-06-24 3:37 ` Jeff King
2015-06-24 5:20 ` Junio C Hamano
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