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Re: [PATCH] ext3,4:fdatasync should skip metadata writeout

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From: Andrew Morton
Subject: Re: [PATCH] ext3,4:fdatasync should skip metadata writeout
Date: Thursday, November 15, 2007 - 7:59 pm

On Fri, 16 Nov 2007 11:47:27 +0900 Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp> wrote:


I suppose so.  Although one wonders what earthly point there is in syncing
a file's data if we haven't yet written out the metadata which is required
for locating that data.

IOW, fdatasync() is only useful if the application knows that it is overwriting
already-instantiated blocks.

In which case it might as well have used fsync().  For ext2-style filesystems,
anyway.

hm.  It needs some thought.
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Messages in current thread:
[PATCH] ext3,4:fdatasync should skip metadata writeout, Hisashi Hifumi, (Thu Nov 15, 7:47 pm)
Re: [PATCH] ext3,4:fdatasync should skip metadata writeout, Andrew Morton, (Thu Nov 15, 7:59 pm)
Re: [PATCH] ext3,4:fdatasync should skip metadata writeout, Jörn, (Thu Nov 15, 8:17 pm)
Re: [PATCH] ext3,4:fdatasync should skip metadata writeout, Jörn, (Thu Nov 15, 8:43 pm)
Re: [PATCH] ext3,4:fdatasync should skip metadata writeout, Wendy Cheng, (Thu Nov 15, 8:47 pm)
Re: [PATCH] ext3,4:fdatasync should skip metadata writeout, Andrew Morton, (Thu Nov 15, 8:53 pm)
Re: [PATCH] ext3,4:fdatasync should skip metadata writeout, Bryan Henderson, (Fri Nov 16, 11:12 am)
Re: [PATCH] ext3,4:fdatasync should skip metadata writeout, Hisashi Hifumi, (Tue Nov 20, 12:20 am)
[RESEND] [PATCH] ext3,4:fdatasync should skip metadata wr ..., Hisashi Hifumi, (Mon Feb 4, 3:15 am)
Re: [RESEND] [PATCH] ext3,4:fdatasync should skip metadata ..., Jan Kara, (Wed Feb 6, 9:22 am)
Re: [RESEND] [PATCH] ext3,4:fdatasync should skip metadata ..., Hisashi Hifumi, (Wed Feb 6, 11:45 pm)