From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To: Matt Mackall <mpm@selenic.com>
Cc: Colin Leroy <colin@colino.net>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] let fat handle MS_SYNCHRONOUS flag
Date: Wed, 24 Nov 2004 15:26:06 +0900 [thread overview]
Message-ID: <871xejvk3l.fsf@devron.myhome.or.jp> (raw)
In-Reply-To: <20041124053552.GD2460@waste.org> (Matt Mackall's message of "Tue, 23 Nov 2004 21:35:52 -0800")
Matt Mackall <mpm@selenic.com> writes:
>> Things which I want to say here - do we really need the bogus
>> sync-mode?
>
> I'm not sure why you say it's bogus. Ext2 for instance has long had a
> mount option similar to this and it makes sense in volatile
> environments. Having the flag in the superblock seems a sensible way
> of doing it as well.
AFAIK, EXT2 doesn't update all metadata synchronously in sync-mode.
>> Current fatfs is not keeping the consistency of data on the disk at
>> all. So, after all, the data on a disk is corrupting until all
>> syscalls finish, right?
>
> This is to protect against usage patters like mv a b, oh look, it's
> done, unplug. Not lots of active readers/writers.
I think we don't need synchronous update for it, probably we just need
to flush the buffers on each operations.
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
next prev parent reply other threads:[~2004-11-24 6:26 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-18 18:49 [PATCH] let fat handle MS_SYNCHRONOUS flag Colin Leroy
2004-11-18 18:51 ` [PATCH] let vfat " Colin Leroy
2004-11-23 19:32 ` [PATCH] let fat " Colin Leroy
2004-11-23 20:24 ` OGAWA Hirofumi
2004-11-24 3:20 ` Matt Mackall
2004-11-24 5:00 ` OGAWA Hirofumi
2004-11-24 5:35 ` Matt Mackall
2004-11-24 6:26 ` OGAWA Hirofumi [this message]
2004-11-24 6:40 ` Andrew Morton
2004-11-24 6:49 ` Matt Mackall
2004-11-24 6:57 ` Andrew Morton
2004-11-24 13:26 ` OGAWA Hirofumi
2004-11-24 5:41 ` Bernd Eckenfels
2004-11-24 7:30 ` Colin Leroy
2004-11-24 3:17 ` Matt Mackall
2004-11-24 7:34 ` Colin Leroy
2004-11-24 7:50 ` Matt Mackall
2004-11-24 8:40 ` Colin Leroy
2004-11-24 14:02 ` OGAWA Hirofumi
2004-11-24 14:25 ` Colin Leroy
2004-11-24 15:02 ` Colin Leroy
2004-11-24 18:10 ` OGAWA Hirofumi
2004-11-24 20:28 ` Colin Leroy
[not found] ` <87k6saunwl.fsf@devron.myhome.or.jp>
2004-11-25 12:47 ` Colin Leroy
[not found] ` <87act6ulc5.fsf@devron.myhome.or.jp>
2004-11-25 13:11 ` Colin Leroy
2004-12-29 19:33 ` Robert Hardy
2004-12-30 3:02 ` OGAWA Hirofumi
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