On Wed, Jan 04, 2012 at 02:54:25PM -0600, Eric Sandeen wrote: > Ok, this is a significant rework of 275, which made too many > assumptions about details of space usage and failed on several > filesystems (it passed on xfs, but only by accident). > > This new version tries to leave about 256k free, then tries > a single 1M IO, and fails only if 0 bytes are written. > > It also sends a lot more to $seq.full for debugging on failure > and fixes a few other stylistic things. > > Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx> I just had another thought about this, Eric.... > +# And at least some of it should succeed. > +_filesize=`du $SCRATCH_MNT/tmp1 | awk '{print $1}'` > +[ $_filesize -eq 0 ] && _fail "write file err: Partial write until enospc failed; wrote 0 bytes." The question that just came to mind was this assumes that allocation succeeded so therefore the partial write succeeded. But that's not necessary the case. The partial write might not succeed leaving the file size as zero, but the underlying FS might not remove all the blocks it allocated (nothing says that it has to). Hence to determine if a partial write succeeded, we also need to check that the file size itself is greater than zero.... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html