diff options
| author | Stanislaw Gruszka <sgruszka@redhat.com> | 2010-09-14 16:35:14 +0200 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-01-06 18:07:59 -0500 |
| commit | a1ec005ae55ca04896388df88a3763903be2bd9c (patch) | |
| tree | 9c11922129924f266ba44fa9a46596bab16277b6 /kernel/kexec.c | |
| parent | 29562d83a2d8d0bbe5ffb0d976c6c73d5a269853 (diff) | |
sched: Fix user time incorrectly accounted as system time on 32-bit
commit e75e863dd5c7d96b91ebbd241da5328fc38a78cc upstream.
We have 32-bit variable overflow possibility when multiply in
task_times() and thread_group_times() functions. When the
overflow happens then the scaled utime value becomes erroneously
small and the scaled stime becomes i erroneously big.
Reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=633037
https://bugzilla.kernel.org/show_bug.cgi?id=16559
Reported-by: Michael Chapman <redhat-bugzilla@very.puzzling.org>
Reported-by: Ciriaco Garcia de Celis <sysman@etherpilot.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
LKML-Reference: <20100914143513.GB8415@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'kernel/kexec.c')
0 files changed, 0 insertions, 0 deletions