---------- Forwarded message ---------- From: "Christian Ruppert via RT" <bug-apache-sizeli...@rt.cpan.org> Date: Jan 4, 2012 5:09 PM Subject: [rt.cpan.org #73752] Wrong unshared memory values when using /proc/self/statm To:
Wed Jan 04 20:09:34 2012: Request 73752 was acted upon.
Transaction: Ticket created by idl0r
Queue: Apache-SizeLimit
Subject: Wrong unshared memory values when using /proc/self/statm
Broken in: (no value)
Severity: (no value)
Owner: Nobody
Requestors: id...@qasl.de
Status: new
Ticket <URL: https://rt.cpan.org/Ticket/Display.html?id=73752 >
Hi everybody,
Using Linux::Smaps is not always possible, for example when using Grsecurity
patches for the Linux kernel.
This ends up in using /proc/self/statm instead of smaps, see attachment for
a
test case.
<snip>
% perl test.pl
Legacy check: SIZE=20844, SHARE=1720, UNSHARED=19124
Smaps check: SIZE=20848, SHARE=1776, UNSHARED=928
</snip>
So assuming unshared is $size - $share seems to be totally wrong, note the
huge difference between unshared with smaps and with statm.
--
Regards,
Christian Ruppert
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test.pl
Description: Perl program
signature.asc
Description: PGP signature
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