From: Artem Bityutskiy <dedekind1@gmail.com>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-fsdevel@vger.kernel.org,
Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Subject: Re: [PATCHv5 04/16] VFS: add memory barrier to sb_mark_clean and sb_mark_dirty
Date: Sun, 06 Jun 2010 20:16:20 +0300 [thread overview]
Message-ID: <1275844581.17909.2.camel@localhost.localdomain> (raw)
In-Reply-To: <1275835829-1478-5-git-send-email-dedekind1@gmail.com>
On Sun, 2010-06-06 at 17:50 +0300, Artem Bityutskiy wrote:
> void sb_mark_dirty(struct super_block *sb);
> static inline void sb_mark_clean(struct super_block *sb)
> {
> sb->s_dirty = 0;
> + /*
> + * Normally FSes first unset the sb->s_dirty flag, and then start
> + * synchronizing the SB. The memory barrier ensures this order.
> + */
> + smp_mb();
...
> void sb_mark_dirty(struct super_block *sb)
> {
> + /*
> + * Normally FSes modify the SB, and then mark it as dirty. The memory
> + * barrier ensures this order.
> + */
> + smp_mb();
...
Hmm, these ones should be 'mb()', not 'smp_mb()'.
--
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
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next prev parent reply other threads:[~2010-06-06 17:16 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-06 14:50 [PATCHv5 00/16] kill unnecessary SB sync wake-ups + cleanups Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 01/16] VFS: introduce helpers for the s_dirt flag Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 02/16] VFS: rename s_dirt to s_dirty Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 03/16] writeback: lessen sync_supers wakeup count Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 04/16] VFS: add memory barrier to sb_mark_clean and sb_mark_dirty Artem Bityutskiy
2010-06-06 17:16 ` Artem Bityutskiy [this message]
2010-06-06 19:22 ` Artem Bityutskiy
2010-06-09 16:36 ` Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 05/16] AFFS: clean up dirty flag usage Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 06/16] AFFS: wait for sb synchronization when needed Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 07/16] AFFS: fix race condition in marking SB dirty Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 08/16] BFS: clean up the superblock usage Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 09/16] btrfs: remove junk sb_mark_dirty call Artem Bityutskiy
2010-06-12 7:36 ` Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 10/16] exofs: fix race condition in marking SB dirty Artem Bityutskiy
2010-06-06 16:12 ` Boaz Harrosh
2010-06-06 14:50 ` [PATCHv5 11/16] ext2: " Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 12/16] ext4: " Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 13/16] HFS: " Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 14/16] HFS: kill hfs_buffer_sync Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 15/16] HFS: wait for sb synchronization when needed Artem Bityutskiy
2010-06-06 14:50 ` [PATCHv5 16/16] HFSPLUS: wait for synchronization Artem Bityutskiy
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