linux-kernel - SCHED_OMIT_FRAME_POINTER configuration option wrong

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Date:	Thu, 20 May 2010 18:30:07 +0100
From:	"Frank A. Kingswood" <frank@...gswood-consulting.co.uk>
To:	linux-kernel@...r.kernel.org
Subject: SCHED_OMIT_FRAME_POINTER configuration option wrong

Hi!

The configuration option SCHED_OMIT_FRAME_POINTER seems to have gained a 
most unusual description in 2.6.34.

490 config SCHED_OMIT_FRAME_POINTER
491         def_bool y
492         prompt "Single-depth WCHAN output"
493         depends on X86
494         ---help---
495           Calculate simpler /proc/<PID>/wchan values. If this option
496           is disabled then wchan values will recurse back to the
497           caller function. This provides more accurate wchan values,
498           at the expense of slightly more scheduling overhead.
499
500           If in doubt, say "Y".

Frank

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