Messages in this thread | | | Date | Tue, 10 May 2011 14:41:03 +0200 | From | Jan Kara <> | Subject | Re: [PATCH 2/7] fs: block_page_mkwrite should wait for writeback to finish |
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On Mon 09-05-11 16:03:34, Darrick J. Wong wrote: > For filesystems such as nilfs2 and xfs that use block_page_mkwrite, modify that > function to wait for pending writeback before allowing the page to become > writable. This is needed to stabilize pages during writeback for those two > filesystems. > > Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> > --- > fs/buffer.c | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > > diff --git a/fs/buffer.c b/fs/buffer.c > index a08bb8e..cf9a795 100644 > --- a/fs/buffer.c > +++ b/fs/buffer.c > @@ -2361,6 +2361,7 @@ block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, > if (!ret) > ret = block_commit_write(page, 0, end); > > + wait_on_page_writeback(page); Not that it matters much but it would seem more logical to me if we waited only in not-error case (i.e. after the error handling below).
Honza > if (unlikely(ret)) { > unlock_page(page); > if (ret == -ENOMEM) > -- Jan Kara <jack@suse.cz> SUSE Labs, CR
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