On Wed, Dec 10, 2014 at 09:25:18PM -0500, Theodore Ts'o wrote: > It's possible based on a race conditions (and possibly the version of > coreutils which supplies /usr/bin/yes) that commands of the form: > > yes | $MKFS_PROG ... > > will end up causing the following failure: What race conditions? > shared/298 16s ... [23:49:03] [23:49:19] - output mismatch (see /results/results-4k/shared/298.out.bad) > --- tests/shared/298.out 2014-10-31 10:13:04.000000000 -0400 > +++ /results/results-4k/shared/298.out.bad 2014-11-29 23:49:19.118138099 -0500 > @@ -1,4 +1,6 @@ > QA output created by 298 > +yes: standard output: Broken pipe > +yes: write error But thats indicative that something failed and you need to analyse the reason, yes? So AFAICT this is deisred behaviour, and hiding the error will actually hide other failures, right? > Generating garbage on loop...done. > Running fstrim...done. > Detecting interesting holes in image...done. > ... > (Run 'diff -u tests/shared/298.out /results/results-4k/shared/298.out.bad' to see the entire diff) > > The simplest way to fix this is to redirect the stderr of the yes > command to /dev/null. I'd highly recommend you add ext4 specific mkfs branches so you can use the non-interactive/force mkfs flags so that "yes |" is not necessary for your (and everyone elses ext4) test environments. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe fstests" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
