On Thu, Feb 14 2013, Vladimir Davydov wrote: > Using wait_for_completion() for waiting for a IO request to be executed > results in wrong iowait time accounting. For example, a system having > the only task doing write() and fdatasync() on a block device can be > reported being idle instead of iowaiting as it should because > blkdev_issue_flush() calls wait_for_completion() which in turn calls > schedule() that does not increment the iowait proc counter and thus does > not turn on iowait time accounting. > > The patch makes block layer use wait_for_completion_io() instead of > wait_for_completion() where appropriate to account iowait time > correctly.
Thanks, applied both for 3.9 (with Ingos ack). -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
