On 01/20/2016 10:20 AM, Christoph Lameter wrote: > On Wed, 20 Jan 2016, Michal Hocko wrote: > >> > On Wed 20-01-16 09:56:26, Sasha Levin wrote: >>> > > On 01/20/2016 09:37 AM, Michal Hocko wrote: >>>> > > > I am just reading through this old discussion again because "vmstat: >>>> > > > make vmstat_updater deferrable again and shut down on idle" which seems >>>> > > > to be the culprit AFAIU has been merged as 0eb77e988032 and I do not see >>>> > > > any follow up fix merged to linus tree >>> > > >>> > > So this isn't an "old" discussion - the bug is very much there and I can >>> > > hit it easily. As a workaround I've "disabled" vmstat. >> > >> > Well the report is since 18th Dec which is over month old. Should we >> > revert 0eb77e988032 as a pre caution and make sure this is done properly >> > in -mm tree. AFAIR none of the proposed fix worked without other >> > fallouts? > Seems that we are unable to get enough information to reproduce the issue? As I've mentioned - this reproduces frequently. I'd be happy to add in debug information into the kernel that might help you reproduce it, but as it seems like a timing issue, I can't provide a simple reproducer. Thanks, Sasha -- 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>