On Thu, Oct 28, 2010 at 10:19:49AM -0400, Christoph Hellwig wrote:
> > + * Write out an inode's dirty pages. Called under inode_wb_list_lock. Either
> > + * the caller has ref on the inode (either via __iget or via syscall against an
> > + * fd) or the inode has I_WILL_FREE set.
>
> Just drop mentioning of how we got the reference ,it's rather pointless.
OK.
> > writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
> > @@ -354,7 +368,7 @@ writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
> > inode->i_state |= I_SYNC;
> > inode->i_state &= ~I_DIRTY_PAGES;
> > spin_unlock(&inode->i_lock);
> > - spin_unlock(&inode_lock);
> > + spin_unlock(&inode_wb_list_lock);
>
> We don't actually need inode_wb_list_lock here. But I guess we can
> fix this later and be conservative for now.
Hmmm - I think you are right. However, there are lots of
opportunities for cleaning up the locking in this areaÅ so leaving
it for later is probably best.
> > @@ -963,63 +976,62 @@ void __mark_inode_dirty(struct inode *inode, int flags)
>
> I think the __mark_inode_dirty cleanup should be a separate patch,
> it's rather confusing in the current form.
Ok. I'll leave it out for now - there's various other cleanups
needed here now as well (e.g. the unlocked flags check is not needed
to avoid a global lock anymore) so I'll leave that for later, too.
> > + if (was_dirty) {
> > +out_unlock_inode:
> > spin_unlock(&inode->i_lock);
> > + return;
> > + }
>
> Please just move the label to the end of the function and add another
> goto here.
Will do.
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
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