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SubjectRe: [PATCH] fs-writeback: handle errors in sync_sb_inodes()
On Tue, May 27, 2008 at 10:38:32PM -0700, Andrew Morton wrote:
> On Fri, 23 May 2008 22:34:29 +0200 Guillaume Chazarain <guichaz@gmail.com> wrote:
> > diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
> > index 495214d..0e6881e 100644
> > --- a/fs/fs-writeback.c
> > +++ b/fs/fs-writeback.c
> > @@ -454,6 +454,7 @@ void generic_sync_sb_inodes(struct super_block *sb,
> > struct address_space *mapping = inode->i_mapping;
> > struct backing_dev_info *bdi = mapping->backing_dev_info;
> > long pages_skipped;
> > + int err;
> >
> > if (!bdi_cap_writeback_dirty(bdi)) {
> > redirty_tail(inode);
> > @@ -498,7 +499,8 @@ void generic_sync_sb_inodes(struct super_block *sb,
> > BUG_ON(inode->i_state & I_FREEING);
> > __iget(inode);
> > pages_skipped = wbc->pages_skipped;
> > - __writeback_single_inode(inode, wbc);
> > + err = __writeback_single_inode(inode, wbc);
> > + mapping_set_error(mapping, err);
> > if (wbc->sync_mode == WB_SYNC_HOLD) {
> > inode->dirtied_when = jiffies;
> > list_move(&inode->i_list, &sb->s_dirty);
>
> ho hum, I've forgotten why I didn't like this. Let's give it a run.

IIRC, it'll produce lots of spurious EIO errors under writeback on
XFS as XFS will return EAGAIN if we've been asked for a non-blocking
flush and we would have blocked....

Cheers,

Dave.
--
Dave Chinner
david@fromorbit.com


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