On Thu, Feb 09, 2012 at 04:02:24PM +0800, Wu Fengguang wrote: > On Thu, Feb 09, 2012 at 10:27:19AM +1100, Dave Chinner wrote: > > On Wed, Feb 08, 2012 at 07:01:44PM +0800, Wu Fengguang wrote: > > > Buffered write(2) is not directly tied to IO, so it's not suitable to > > > handle plug in generic_file_aio_write(). > > > > But generic_sync_write() does issue IO for O_SYNC writes, so unless > > there is plugging at a lower layer in the writeback code then it > > appears to me that plugging is still necessary (at least inside the > > sync branch).... > > Good catch! It looks that generic_write_sync() eventually calls into > vfs_fsync_range() which further calls ->fsync(). We may add plugging > around it: NAK, please keep the plugging down in the fs, or the libraries used but not common VFS code. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
