diff options
| author | Frederic Weisbecker <fweisbec@gmail.com> | 2011-03-31 03:33:29 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-04-14 13:02:14 -0700 |
| commit | f8e3c0bb58a569babfb8d72e7e0655686dbcbab1 (patch) | |
| tree | 0829ed7f4ecc352cf0ba331c68a44dd44c2c4695 /kernel/perf_event.c | |
| parent | 80b9edca1c11ec8118ab30451af9c1d492770c90 (diff) | |
perf: Rebase max unprivileged mlock threshold on top of page size
commit 20443384fe090c5f8aeb016e7e85659c5bbdd69f upstream.
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>
LKML-Reference: <1301535209-9679-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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 07fcc8568fa..b2536bd2b6b 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -62,8 +62,8 @@ 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 |