Re: [PATCH 1/1] perf,tools: add time out to force stop endless mmap processing

From	David Ahern <dsahern@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/1] perf,tools: add time out to force stop endless mmap processing
Date	2015-06-12 02:40 +0200
Message-ID	<pAlaP-5CK-41@gated-at.bofh.it> (permalink)
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On 6/11/15 12:47 PM, Andi Kleen wrote:
>> Can you elaborate on an example? I don't see how this can happen
>> reading a maps file. And it does not read maps for all threads only
>> thread group leaders.
>
> This is with a stress test case that generates lots of small mappings
> at very high speed and frees them again. So the maps file keeps changing
> faster than the proc reader can keep it and it can end up with
> a live lock.

Can you pass it along? I'd like to see how the task_diag proposal 
handles it.

https://github.com/dsahern/linux/commits/task_diag-wip
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Re: [PATCH 1/1] perf,tools: add time out to force stop endless mmap  processing David Ahern <dsahern@gmail.com> - 2015-06-12 02:40 +0200
  Re: [PATCH 1/1] perf,tools: add time out to force stop endless mmap  processing David Ahern <dsahern@gmail.com> - 2015-06-13 06:10 +0200
  Re: [PATCH 1/1] perf,tools: add time out to force stop endless mmap  processing David Ahern <dsahern@gmail.com> - 2015-06-13 06:30 +0200
    Re: [PATCH 1/1] perf,tools: add time out to force stop endless mmap  processing Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-06-16 20:10 +0200

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