Messages in this thread | | | Subject | Re: [PATCH] proc: remove /proc/*/status "Stack usage:" | From | Stefani Seibold <> | Date | Mon, 02 Nov 2009 00:32:08 +0100 |
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Am Sonntag, den 01.11.2009, 18:53 +0300 schrieb Alexey Dobriyan: > On Sun, Nov 01, 2009 at 03:39:57PM +0100, Stefani Seibold wrote: > > Am Sonntag, den 01.11.2009, 16:15 +0300 schrieb Alexey Dobriyan: > > > We have /proc/*/pagemap to determine how much stack was consumed. > > > Leave "threadstack" though. > > > > > > > Stop! /proc/*/pagemap is not a real substitute for the stackm usage > > patch. If you have problems with this patch i will have a look on it. > > Why? > > You grab thread stack start from /proc/*/stat, then for every page of > stack VMA, you lookup state of page, which is exactly what you're doing > by employing page walker.
First, as you figured out there is currently no way to get the stack start of a thread. But i currently check this and hope to find a solution in the next 24 hours.
Second, this patch aims to the embedded world and there is normally no tools available when you need it, but /proc is always there. Especially outside in the field.
Like Dr Frank. N. Furter in the "Rocky Horror Picture Show" says: remove the cause but NOT the symptoms!
And the cause is the miss implemented KSTK_ESP in a x86_64. I also checked all other architekture depended KSTK_ESP definitions and this definitions looks okay for me.
Stand by....
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