Arnaldo Carvalho de Melo e09b18d490 perf trace: Provide a better explanation when mmap fails ... If we ask for a mmap lenght than the max configured via the relevant sysctl, provide a better warning, instead of just expanding the EPERM returned: [acme@ssdandy ~]$ trace -m 256 -e nanosleep sleep 2 Error: Operation not permitted. Hint: Check /proc/sys/kernel/perf_event_mlock_kb (516 kB) setting. Hint: Tried using 1028 kB. Hint: Try using a bigger -m/--mmap-pages value. [acme@ssdandy ~]$ trace -m 128 -e nanosleep sleep 2 2001.280 (2000.403 ms): nanosleep(rqtp: 0x7fff89a8a7f0) = 0 [acme@ssdandy ~]$ An upcoming patch will autotune the request for non-root users when -m is not used. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-cdvxfz2gycetbkopm9sna1qp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2014-12-11 18:04:10 -03:00
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cgroup
firewire
hv
include
lguest
lib	tools lib fs: Add sysctl__read_int helper	2014-12-11 17:53:00 -03:00
net
nfsd
perf	perf trace: Provide a better explanation when mmap fails	2014-12-11 18:04:10 -03:00
power
scripts
testing
thermal/tmon	calloc/xcalloc: Fix argument order	2014-12-09 10:06:29 -03:00
time
usb
virtio
vm
Makefile