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: > > Jens, can you try XFS too? Since ext3 can't do direct IO to a hole, > (and I'm not sure about btrfs in that regard), ext4 may be most similar > to xfs's behavior on the test ... wondering how it fares. > > Thanks, > -Eric Actually mingming had a patch for direct-io.c which may be related, I'll test that out. -Eric -- 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
