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| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2019-02-27 11:10:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-11 12:23:58 +0200 |
| commit | 6f5e198878fb4826b16be17d925e97bae2e57f5e (patch) | |
| tree | a1b8c41d43102cecc901b2fcb5a0faec380e43c6 /tools/perf/scripts/python/bin | |
| parent | 9812286a63a1d9b953d723b972b0e0241ae0c47c (diff) | |
sched/core: Handle overflow in cpu_shares_write_u64
[ Upstream commit 5b61d50ab4ef590f5e1d4df15cd2cea5f5715308 ]
Bit shift in scale_load() could overflow shares. This patch saturates
it to MAX_SHARES like following sched_group_set_shares().
Example:
# echo 9223372036854776832 > cpu.shares
# cat cpu.shares
Before patch: 1024
After pattch: 262144
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/155125501891.293431.3345233332801109696.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/bin')
0 files changed, 0 insertions, 0 deletions