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authorFrederic Weisbecker <fweisbec@gmail.com>2011-03-31 03:35:24 +0200
committerIngo Molnar <mingo@elte.hu>2011-03-31 13:02:55 +0200
commit800cd25c12981c99e5401c3551ffffd99f1c6c85 (patch)
tree8a3b1ef662a9190219aaaad842072495fcd70654 /kernel
parent20443384fe090c5f8aeb016e7e85659c5bbdd69f (diff)
perf: mmap 512 kiB by default
The default setting of perf record is to mmap 128 pages if the user did not override with -m. However the page size may vary accross different architecture settings, giving different default size between each. Moreover the kernel side still has a default max number of mlocked pages of 512 kiB + 1 page for unprivileged users. 128 + 1 pages with page size > 4096 overlaps this threshold. Thus, better adapt to this limitation and set the default number of pages to fit those 512 kiB + 1 page. 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: <1301535324-9735-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions