From: Pavel Emelyanov <xemul@parallels.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: "fuse-devel@lists.sourceforge.net"
<fuse-devel@lists.sourceforge.net>,
Alexander Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
James Bottomley <jbottomley@parallels.com>,
Kirill Korotaev <dev@parallels.com>
Subject: Re: [PATCH 6/10] fuse: Trust kernel i_size only
Date: Thu, 05 Jul 2012 18:10:56 +0400 [thread overview]
Message-ID: <4FF5A070.7030206@parallels.com> (raw)
In-Reply-To: <8762a3pp3m.fsf@tucsk.pomaz.szeredi.hu>
On 07/04/2012 06:39 PM, Miklos Szeredi wrote:
> Pavel Emelyanov <xemul@parallels.com> writes:
>
>> Make fuse think that when writeback is on the inode's i_size is alway
>> up-to-date and not update it with the value received from the
>> userspace. This is done because the page cache code may update i_size
>> without letting the FS know.
>
> Similar rule applies to i_mtime. Except it's even more tricky, since
> you have to flush the mtime together with the data (the flush should not
> update the modification time). And we have other operations which also
> change the mtime, and those also need to be updated.
Yup, I've missed that part :( Thanks for pointing this out.
> We should probably look at what NFS is doing.
I'll look at what can be done about it.
Thanks,
Pavel
next prev parent reply other threads:[~2012-07-05 14:11 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-03 15:53 [PATCH 0/10] fuse: An attempt to implement a write-back cache policy Pavel Emelyanov
2012-07-03 15:53 ` [PATCH 1/10] fuse: Linking file to inode helper Pavel Emelyanov
2012-07-03 15:54 ` [PATCH 2/10] fuse: Getting file for writeback helper Pavel Emelyanov
2012-07-03 15:54 ` [PATCH 3/10] fuse: Prepare to handle short reads Pavel Emelyanov
2012-07-03 15:55 ` [PATCH 4/10] fuse: Prepare to handle multiple pages in writeback Pavel Emelyanov
2012-07-04 13:06 ` Miklos Szeredi
2012-07-04 14:26 ` Pavel Emelyanov
2012-07-03 15:55 ` [PATCH 6/10] fuse: Trust kernel i_size only Pavel Emelyanov
2012-07-04 14:39 ` Miklos Szeredi
2012-07-05 14:10 ` Pavel Emelyanov [this message]
2012-07-10 5:53 ` Pavel Emelyanov
2012-07-13 16:30 ` Miklos Szeredi
2012-07-16 3:32 ` Pavel Emelyanov
2012-07-17 15:17 ` Miklos Szeredi
[not found] ` <8762a3pp3m.fsf-d8RdFUjzFsbxNFs70CDYszOMxtEWgIxa@public.gmane.org>
2012-10-01 17:30 ` Maxim V. Patlasov
2012-11-16 9:49 ` Miklos Szeredi
2012-11-16 10:32 ` Maxim V. Patlasov
[not found] ` <4FF3156E.8030109-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2012-07-03 15:55 ` [PATCH 5/10] fuse: Connection bit for enabling writeback Pavel Emelyanov
2012-07-03 15:56 ` [PATCH 7/10] fuse: Flush files on wb close Pavel Emelyanov
2012-07-03 15:56 ` [PATCH 8/10] fuse: Implement writepages and write_begin/write_end callbacks Pavel Emelyanov
2012-07-03 15:57 ` [PATCH 9/10] fuse: Turn writeback on Pavel Emelyanov
2012-07-04 3:01 ` [PATCH 0/10] fuse: An attempt to implement a write-back cache policy Nikolaus Rath
[not found] ` <87a9zg1b7q.fsf-sKB8Sp2ER+yL2G7IJ6k9tw@public.gmane.org>
2012-07-04 7:11 ` Pavel Emelyanov
2012-07-04 13:22 ` Nikolaus Rath
[not found] ` <4FF4438B.8050807-BTH8mxji4b0@public.gmane.org>
2012-07-04 14:33 ` Pavel Emelyanov
[not found] ` <4FF45447.5000705-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2012-07-04 17:08 ` Nikolaus Rath
2012-07-05 9:01 ` Pavel Emelyanov
2012-07-05 13:07 ` Nikolaus Rath
2012-07-05 14:08 ` Pavel Emelyanov
2012-07-05 14:29 ` Nikolaus Rath
2012-07-05 14:34 ` Pavel Emelyanov
2012-07-06 2:04 ` Nikolaus Rath
[not found] ` <8762a1odbf.fsf-sKB8Sp2ER+yL2G7IJ6k9tw@public.gmane.org>
2012-07-06 8:46 ` Pavel Emelyanov
2012-07-05 19:31 ` Anand Avati
[not found] ` <4FF5EB85.1050701-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-07-05 20:07 ` Pavel Emelyanov
2012-07-06 11:52 ` [fuse-devel] " Kirill Korotaev
2012-07-03 15:57 ` [PATCH 10/10] mm: Account for WRITEBACK_TEMP in balance_dirty_pages Pavel Emelyanov
[not found] ` <4FF3166B.5090800-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2012-07-13 16:57 ` Miklos Szeredi
2012-07-16 3:27 ` Pavel Emelyanov
2012-07-17 19:11 ` Miklos Szeredi
2012-07-27 4:01 ` Pavel Emelyanov
[not found] ` <5012127C.8070203-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2012-08-07 17:30 ` Miklos Szeredi
2012-07-05 19:26 ` [fuse-devel] [PATCH 0/10] fuse: An attempt to implement a write-back cache policy Anand Avati
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