On 04/02/2013 04:27 PM, Mel Gorman wrote: > I'm testing a page-reclaim-related series on my laptop that is partially > aimed at fixing long stalls when doing metadata-intensive operations on > low memory such as a git checkout. I've been running 3.9-rc2 with the > series applied but found that the interactive performance was awful even > when there was plenty of free memory. > > I activated a monitor from mmtests that logs when a process is stuck for > a long time in D state and found that there are a lot of stalls in ext4. > The report first states that processes have been stalled for a total of > 6498 seconds on IO which seems like a lot. Here is a breakdown of the > recorded events. Just a note that I am indeed using ext4 on the affected machine for all filesystems I have except for an efi partition... -- js suse labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>