Sage Weil <sage@xxxxxxxxxxxx> writes: > I hit the following under a reasonable simple aio workload: > > - reasonably heavy load > - lots of threads doing buffered io to random files > - one thread submitting O_DIRECT aio to a single file (journal), all > sequential (wrapping), 100MB > - probably somewhere between 1 and 50 aios outstanding at any point in > time. > > The kernel was v3.2 mainline, plus unrelated btrfs and ceph patches. > > Is this a known issue? Any other information that would be helpful? I don't know for sure, but could you test with the following commit? 69e4747ee9727d660b88d7e1efe0f4afcb35db1b Also, I'll note that it looks like you are doing O_SYNC + O_DIRECT AIO. I'm curious to know what apps use that particular combination. Is this just a test case, or do you have an app which does this in production? Cheers, Jeff -- 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
