Re: [PATCH RFC] __bd_forget should wait for inodes using the mapping

[Chris Mason <mason@suse.com>]

On Fri, 2004-06-18 at 17:27, Andrew Morton wrote:
> Chris Mason <mason@suse.com> wrote:
> >
> > [ skip writing block-special inodes ]
> > 
> > Hmmm, any risk in missing data integrity syncs because of this?
> 
> Need to think about that.  sys_fsync(), sys_fdatasync() and sys_msync() go
> direct to file->f_mapping and sys_sync() will sync the blockdev via its
> kernel-internal inode.  What does that leave?

I was worried about O_SYNC, That actually looks safe though,
generic_osync_inode will first write the mapping via filemap_fdatawrite
(the mapping comes from f_mapping).

It doesn't really give me warm fuzzies, but looks safe enough.  Al had a
slightly different plan, maybe with your patch we can push his larger
changes off a bit?

-chris