On 07/07/10 16.26, Eric Sandeen wrote: > Jens Axboe wrote: >> Hi, >> >> I was writing a small fio job file to do writes and read verifies on a >> device. It forks 32 processes, each writing randomly to 4 files with a >> block size between 4k and 16k. When it has written 1024 of those blocks, >> it'll verify the oldest 512 of them. Each block is checksummed for every >> 512b. It uses libaio and O_DIRECT. >> >> It works on ext2 and btrfs. I haven't run it to completion yet, but they >> survive 15-20 minutes just fine. ext4 doesn't even go a full minutes >> before this triggers: >> >> Bad verify header 0 at 10137600 >> fio: pid=9943, err=84/file:io_u.c:1212, func=io_u_queued_complete, error=Invalid or incomplete multibyte or wide character >> >> writers: (groupid=0, jobs=32): err=84 (file:io_u.c:1212, func=io_u_queued_complete, error=Invalid or incomplete multibyte or wide character): pid=9943 > > FYI: > > I asked Jens to test hch's and Jiaying's aio completion patches with this, > and apparently those fixed this problem for him. At least for a shorter run, but long enough that all the holes should have been filled at this point. So it at least fixes my test case. I can try and expand the run a bit if there's any interest in that, and see if that still verifies correctly. -- Jens Axboe -- 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
