On Thu, 2011-04-28 at 18:18 +0100, Mel Gorman wrote: > On Thu, Apr 28, 2011 at 11:56:17AM -0500, James Bottomley wrote: > > On Thu, 2011-04-28 at 11:50 -0500, James Bottomley wrote: > > > This is the output of perf record -g -a -f sleep 5 > > > > > > (hopefully the list won't choke) > > > > Um, this one actually shows kswapd > > > > James > > > > --- > > > > # Events: 6K cycles > > # > > # Overhead Command Shared Object Symbol > > # ........ ........... ................... ....................................... > > # > > 20.41% kswapd0 [kernel.kallsyms] [k] shrink_slab > > | > > --- shrink_slab > > | > > |--99.91%-- kswapd > > | kthread > > | kernel_thread_helper > > --0.09%-- [...] > > > > Ok. I can't see how the patch "mm: vmscan: reclaim order-0 and use > compaction instead of lumpy reclaim" is related unless we are seeing > two problems that happen to manifest in a similar manner. That is a distinct possibility. > > However, there were a number of changes made to dcache in particular > for 2.6.38. Specifically thinks like dentry_kill use trylock and is > happy to loop around if it fails to acquire anything. See things like > this for example; > [ text deleted ] > Way hey, cgroups are also in the mix. How jolly. > > Is systemd a common element of the machines hitting this bug by any > chance? Not in my case, using upstart on my machine. > Colin -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>