dm-log-writes is probably what you want. Thanks, Josef Sent from my iPhone > On Dec 14, 2016, at 9:27 PM, Kent Overstreet <kent.overstreet@xxxxxxxxx> wrote: > > As many tests as there are in xfstests that simulate disk failure/powerloss, I'm > having a hard time believing that no one's bothered to write code to simulate a > writeback cache (so the test can drop the cached writes and test flush/fua > correctness). > > So does anyone know if such code exists and I just missed it? > > Or failing that, any suggestions on the easiest way to hack something up? This > is turning into a really irritating problem because it'd be simple enough to > write from scratch, but given the amount of code we have that does stuff like > this writing it from scratch seems rather silly - hacking loop to do buffered IO > instead of O_DIRECT would almost do it, I'd think, except I'm looking at loop.c > and just trying to follow the entry points and control flow is making my blood > pressure rise. > > Ideally we'd have something that could easily slot into xfstests, which is using > dm-flakey for these tests right now... > > Any ideas? > -- > 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 -- 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
