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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2011-03-31 03:33:29 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-03-31 13:02:54 +0200 |
| commit | 20443384fe090c5f8aeb016e7e85659c5bbdd69f (patch) | |
| tree | c023e471d96f1c7d5e344f4b6ae7bfb8db0e1937 /kernel/perf_event.c | |
| parent | 652d78fd7a9ebd881290d6bbbc85925c06b907b4 (diff) | |
| download | linux-20443384fe090c5f8aeb016e7e85659c5bbdd69f.tar.gz linux-20443384fe090c5f8aeb016e7e85659c5bbdd69f.tar.bz2 linux-20443384fe090c5f8aeb016e7e85659c5bbdd69f.zip | |
perf: Rebase max unprivileged mlock threshold on top of page size
Ensure we allow 512 kiB + 1 page for user control without
assuming a 4096 bytes page size.
Reported-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: <stable@kernel.org>
LKML-Reference: <1301535209-9679-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_event.c')
| -rw-r--r-- | kernel/perf_event.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index c75925c4d1e2..261690923ffb 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -145,8 +145,8 @@ static struct srcu_struct pmus_srcu; */ int sysctl_perf_event_paranoid __read_mostly = 1; -/* Minimum for 128 pages + 1 for the user control page */ -int sysctl_perf_event_mlock __read_mostly = 516; /* 'free' kb per user */ +/* Minimum for 512 kiB + 1 user control page */ +int sysctl_perf_event_mlock __read_mostly = 512 + (PAGE_SIZE / 1024); /* 'free' kiB per user */ /* * max perf event sample rate |