[lkml]   [2002]   [Mar]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC] write_super is for syncing
Chris Mason wrote:
> Hi everyone,
> The fact that write_super gets called for both syncs and periodic
> commits causes problems for the journaled filesystems, since we
> need to trigger commits on write_super to have sync() behave
> properly.
> So, this patch adds a new super operation called commit_super,
> and extends struct super.s_dirt a little so the filesystem
> can say: call me on sync() but don't call me from kupdate.
> if (s_dirt & S_SUPER_DIRTY) call me from kupdate and on sync
> if (s_dirt & S_SUPER_DIRTY_COMMIT) call me on sync only.

I'm not quite sure why these flags exist? Would it not be
sufficient to just call ->write_super() inside kupdate,
and ->commit_super in fsync_dev()? (With a ->write_super
fallback, of course).

Either way, this is good - ext3's write_super() can just
become a one-liner: `sb->s_dirt = 0'.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:21    [W:0.084 / U:4.380 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site