On 18/06/10 16.59, Eric Sandeen wrote: > 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. OK, I'll try XFS tonight as well. -- 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
