lkml.org 
[lkml]   [2008]   [May]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH] fs-writeback: handle errors in sync_sb_inodes()
On Wed, 28 May 2008 18:25:50 +1000 Dave Chinner <david@fromorbit.com> wrote:

> 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....

OIC. This, I guess...

--- a/fs/fs-writeback.c~fs-writeback-handle-errors-in-sync_sb_inodes-fix
+++ a/fs/fs-writeback.c
@@ -500,7 +500,8 @@ void generic_sync_sb_inodes(struct super
__iget(inode);
pages_skipped = wbc->pages_skipped;
err = __writeback_single_inode(inode, wbc);
- mapping_set_error(mapping, err);
+ if (err == -EIO || err == -ENOSPC) /* xfs can return -EAGAIN */
+ mapping_set_error(mapping, err);
if (wbc->sync_mode == WB_SYNC_HOLD) {
inode->dirtied_when = jiffies;
list_move(&inode->i_list, &sb->s_dirty);
_
I do so need to find time to work out where this all really has gone wrong.


\
 
 \ /
  Last update: 2008-05-28 10:39    [W:0.096 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site