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 --

OK, I'll try XFS tonight as well. -- Jens Axboe --

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 ...

What is this patch against? -- Jens Axboe --

Applied to 2.6.32, seems to apply upstream as well. It hits dio_zero-block() -Eric --

https://bugzilla.kernel.org/show_bug.cgi?id=16165 --- Comment #12 from Eric Sandeen <sandeen@redhat.com> 2010-06-18 15:30:13 --- Can those who can reproduce this test this patch from mingming? When unaligned DIO writes, skip zero out the block if the buffer is marked unwritten. That means there is an asynconous direct IO (append or fill the hole) still pending. Signed-off-by: Mingming Cao <cmm@us.ibm.com> --- fs/direct-io.c | 3 ++- 1 file changed, 2 insertions(+), 1 ...

https://bugzilla.kernel.org/show_bug.cgi?id=16019 --- Comment #33 from Mihai Harpau <mishu@piatafinanciara.ro> 2010-06-18 09:40:36 --- If I do the following on Fedora 13: - boot on runlevel 3 with "nomodeset 3" on grub line - from root prompt run "modprobe -r i915" - run pm-hibernate then I don't see anymore the messages from comment 1 and all seems to be fine. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ...

https://bugzilla.kernel.org/show_bug.cgi?id=16019 --- Comment #37 from Klaus Lichtenwalder <lichtenwalder@acm.org> 2010-06-18 14:52:04 --- In my case it's a Fedora 13 32bit kernel. Just for completeness I attached the config (Comment 36). Klaus -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching someone on the CC list of the bug. --

https://bugzilla.kernel.org/show_bug.cgi?id=16019 --- Comment #35 from Rafael J. Wysocki <rjw@sisk.pl> 2010-06-18 14:39:17 --- Also, I'd like to know if the kernels the issue is reproducible with are 64-bit or 32-bit, and if 32-bit, then what memory .config options are set (ie. is highmem set and if so, what kind of highmem etc.). I'm unable to reproduce the issue with my i915 hardware and a 64-bit kernel, FWIW. -- Configure bugmail: ...