Messages in this thread | | | Subject | 2.6.5-rc2-mm2 and direct_read_under | From | Daniel McNeil <> | Date | 19 Mar 2004 08:49:50 -0800 |
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I re-ran direct_read_under test (6 copies) on 2.6.4-rc2-mm2:
ext3 failed within 2 hours.
ext2 ran overnight without errors.
Daniel
On Thu, 2004-03-18 at 11:10, Daniel McNeil wrote: > On Thu, 2004-03-18 at 10:47, Chris Mason wrote: > > On Thu, 2004-03-18 at 12:53, Daniel McNeil wrote: > > > I'm ran 2.6.4-mm2 plus the 2 wait_on_page_range() patches, > > > the test_set_page_writeback() patch and clear_page_dirty_for_io patch > > > overnight. > > > > > > 6 copies of direct_read_under test on 8-cpu system on 1 > > > ext3 file system in 1 directory on a scsi disk. > > > (http://developer.osdl.org/daniel/AIO/TESTS/direct_read_under.c) > > > > > > 5 of the 6 tests saw uninitialized data within 2 hours. > > > The sixth test ran overnight. > > > > Do you still have the errors generated? I wondering how big the range > > of uninitialized data was. When I was bug hunting yesterday, I saw > > ranges from 64k to 32mb in size, which was why I decided writes weren't > > getting to the disk at all. > > > > It might be interesting to try with data=writeback, or on ext2. Things > > might be easier to track if we're not worried about ll_rw_block. > > > > It might also be interesting to significantly lower the size of the > > reads and writes done by direct_read_under, or anything else you can > > think of to get the reproduce time down to something smaller than 2 > > hours... > > > > It's probably a good idea to upgrade to 2.6.5-rc1-mm2, just so we're all > > staring at the same code. > > > > -chris > > > > Chris, > > Still have the data: > 63 pages (258048 bytes) > 90 pages (368640 bytes) > 139 pages (569344 bytes) > 30 pages (122880 bytes) > 87 pages (356352 bytes) > > > I'm rebooting to 2.6.5-rc1-mm2 and will re-run. I have do have > versions of direct_read_under that do smaller i/o and also > 1 that does forks off and does 'sync' calls every few seconds. > > I'll give ext2 and try as well. > > Daniel > > -- > To unsubscribe, send a message with 'unsubscribe linux-aio' in > the body to majordomo@kvack.org. For more info on Linux AIO, > see: http://www.kvack.org/aio/ > Don't email: <a href=mailto:"aart@kvack.org">aart@kvack.org</a>
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