Messages in this thread |  | | | Date | Sat, 03 Mar 2012 08:29:25 -0700 | | Subject | Re: perf_guest default bug | | From | David Ahern <> |
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Right. And Ingo committed the kernel side patch. I can only recall those 3 fixes at the moment (first sips into the first cup of coffee :-)).
David
Sent from my ASUS Eee Pad
Arnaldo Carvalho de Melo <acme@ghostprotocols.net> wrote:
>Em Sat, Mar 03, 2012 at 11:04:05AM -0300, Arnaldo Carvalho de Melo escreveu: >> Em Fri, Mar 02, 2012 at 12:00:01PM -0700, David Ahern escreveu: >> > Similar to my last email, this patch is not in urgent trees or >> > Linus' yet the problem exists in Linus' tree: >> > https://lkml.org/lkml/2012/2/17/82 >> > >> > $ /tmp/pbuild/perf record -a -- sleep 1 >> > [ perf record: Woken up 1 times to write data ] >> > [ perf record: Captured and wrote 0.319 MB perf.data (~13935 samples) ] >> > Segmentation fault >> > >> > Root cause is the perf_guest setting. >> > >> > $ /tmp/pbuild/perf --version >> > perf version 3.3.rc5.60.g203738 >> >> This one was tricky, IIRC, weren't follow up patches needed to plug some >> extra problems? > >Yeah, just trying cherry picking it and trying it on an RHEL6.2 kernel >and it didn't work because older kernels don't have >attr.exclude_{guest,host}, so I had to also cherrypick: > >[acme@sandy linux]$ git cherry-pick >0c9781280fb672ca09c997df3f14ba506bbdb977 >Finished one cherry-pick. >[perf/urgent b5f81a4] perf tools: Handle kernels that don't support attr.exclude_{guest,host} > >- Arnaldo
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