Messages in this thread | | | Date | Wed, 5 Nov 2014 09:10:26 +0900 | From | Norbert Preining <> | Subject | Re: khugepaged / firefox going wild in 3.18-rc |
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Hi David,
thanks for your answer.
On Tue, 04 Nov 2014, David Rientjes wrote: > If you have the ability to kill your X session, then you presumably are > able to capture /proc/pid/stack for these pids to see where it is busy.
Yes I can do that, I can even reproduce it on *every* start of iceweasel after it happened the first time.
There is no /proc/PID/stack, though .....
> It might also be helpful to see how the grep ^thp_ /proc/vmstat and > grep ^compact_ /proc/vmstat counters change over time.
I captured that over timne, as well as the contents of /proc/PID/stat for iceweasel and khugepaged. There are some numbers steadily increasing.
Here is what I got:
START thp_fault_alloc 9092 thp_fault_fallback 87 thp_collapse_alloc 5003 thp_collapse_alloc_failed 19 thp_split 2889 thp_zero_page_alloc 2 thp_zero_page_alloc_failed 0 compact_migrate_scanned 400301 compact_free_scanned 8634053 compact_isolated 687993 compact_stall 567 compact_fail 101 compact_success 466
thp_fault_alloc 9127 thp_fault_fallback 100 thp_collapse_alloc 5008 thp_collapse_alloc_failed 19 thp_split 2892 thp_zero_page_alloc 2 thp_zero_page_alloc_failed 0 compact_migrate_scanned 430094 compact_free_scanned 10444689 compact_isolated 709843 compact_stall 603 compact_fail 130 compact_success 473 === thp_fault_alloc 9127 thp_fault_fallback 100 thp_collapse_alloc 5008 thp_collapse_alloc_failed 19 thp_split 2892 thp_zero_page_alloc 2 thp_zero_page_alloc_failed 0 compact_migrate_scanned 430094 compact_free_scanned 10444689 compact_isolated 709843 compact_stall 603 compact_fail 130 compact_success 473 === thp_fault_alloc 9127 thp_fault_fallback 100 thp_collapse_alloc 5008 thp_collapse_alloc_failed 19 thp_split 2892 thp_zero_page_alloc 2 thp_zero_page_alloc_failed 0 compact_migrate_scanned 430094 compact_free_scanned 10444689 compact_isolated 709843 compact_stall 603 compact_fail 130 compact_success 473 === thp_fault_alloc 9127 thp_fault_fallback 100 thp_collapse_alloc 5008 thp_collapse_alloc_failed 19 thp_split 2892 thp_zero_page_alloc 2 thp_zero_page_alloc_failed 0 compact_migrate_scanned 430094 compact_free_scanned 10444689 compact_isolated 709843 compact_stall 603 compact_fail 130 compact_success 473 ===
/proc/PID/stat for iceweasel over some time: 8927 (iceweasel) R 27016 26901 26901 0 -1 4204544 100479 2248 5 0 565 14849 1 0 20 0 47 0 38224838 1134931968 84204 18446744073709551615 139840244875264 139840244981188 140737356374240 140737356331656 139840166756100 0 0 4096 17583 18446744073709551615 0 0 17 2 0 0 1 0 0 139840247078912 139840247080712 139840278519808 140737356376815 140737356376825 140737356376825 140737356378085 0 8927 (iceweasel) R 27016 26901 26901 0 -1 4204544 100479 2248 5 0 565 15130 1 0 20 0 47 0 38224838 1134931968 84204 18446744073709551615 139840244875264 139840244981188 140737356374240 140737356331656 139840166756100 0 0 4096 17583 18446744073709551615 0 0 17 1 0 0 1 0 0 139840247078912 139840247080712 139840278519808 140737356376815 140737356376825 140737356376825 140737356378085 0 8927 (iceweasel) R 27016 26901 26901 0 -1 4204544 100479 2248 5 0 565 15460 1 0 20 0 47 0 38224838 1134931968 84204 18446744073709551615 139840244875264 139840244981188 140737356374240 140737356331656 139840166756100 0 0 4096 17583 18446744073709551615 0 0 17 1 0 0 1 0 0 139840247078912 139840247080712 139840278519808 140737356376815 140737356376825 140737356376825 140737356378085 0 8927 (iceweasel) R 27016 26901 26901 0 -1 4204544 100479 2248 5 0 565 15724 1 0 20 0 47 0 38224838 1134931968 84204 18446744073709551615 139840244875264 139840244981188 140737356374240 140737356331656 139840166756100 0 0 4096 17583 18446744073709551615 0 0 17 1 0 0 1 0 0 139840247078912 139840247080712 139840278519808 140737356376815 140737356376825 140737356376825 140737356378085 0
/proc/PID/stat for khugepaged over some time: 35 (khugepaged) R 2 0 0 0 -1 2107456 0 0 0 0 0 39779 0 0 39 19 1 0 22 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 0 0 0 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 35 (khugepaged) R 2 0 0 0 -1 2107456 0 0 0 0 0 40104 0 0 39 19 1 0 22 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 0 0 0 17 2 0 0 0 0 0 0 0 0 0 0 0 0 0 35 (khugepaged) R 2 0 0 0 -1 2107456 0 0 0 0 0 40516 0 0 39 19 1 0 22 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 0 0 0 17 2 0 0 0 0 0 0 0 0 0 0 0 0 0 35 (khugepaged) R 2 0 0 0 -1 2107456 0 0 0 0 0 40797 0 0 39 19 1 0 22 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 0 0 0 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Hope that helps
Norbert
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