[uml-devel] 2.6.10-um, /proc/stat is missing information

[uml-devel] 2.6.10-um, /proc/stat is missing information

[Christopher S. Aker]

I just verified this on a Debian install and an FC2 install.

Moving from 2.6.9-bb4 to 2.6.10-um vanilla, top reports either 100% user, or 100%
idle.

[2.6.10] # cat /proc/stat
cpu  645 1 0 0 0 0 0
cpu0 645 1 0 0 0 0 0
intr 63462 54820 0 174 10 8270 93 0 0 0 0 1 94 0 0
ctxt 108849
btime 1105659428
processes 1542
procs_running 2
procs_blocked 0

[2.6.9-bb4] # cat /proc/stat
cpu  407 0 1989 7536 252 28 1
cpu0 407 0 1989 7536 252 28 1
intr 15430 10185 0 48 1 5035 134 0 0 0 0 0 27 0 0
ctxt 10966
btime 1105660071
processes 1501
procs_running 1
procs_blocked 0

Looks like some information is missing from /proc/stat in 2.6.10.

-Chris



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Re: [uml-devel] 2.6.10-um, /proc/stat is missing information

[Blaisorblade]

On Friday 14 January 2005 00:52, Christopher S. Aker wrote:
> I just verified this on a Debian install and an FC2 install.
>
> Moving from 2.6.9-bb4 to 2.6.10-um vanilla, top reports either 100% user,
> or 100% idle.
>
> [2.6.10] # cat /proc/stat
> cpu  645 1 0 0 0 0 0
> cpu0 645 1 0 0 0 0 0
> intr 63462 54820 0 174 10 8270 93 0 0 0 0 1 94 0 0
> ctxt 108849
> btime 1105659428
> processes 1542
> procs_running 2
> procs_blocked 0
>
> [2.6.9-bb4] # cat /proc/stat
> cpu  407 0 1989 7536 252 28 1
> cpu0 407 0 1989 7536 252 28 1
> intr 15430 10185 0 48 1 5035 134 0 0 0 0 0 27 0 0
> ctxt 10966
> btime 1105660071
> processes 1501
> procs_running 1
> procs_blocked 0
>
> Looks like some information is missing from /proc/stat in 2.6.10.
>
> -Chris
Try retesting after applying update-process-times.patch (the one for the crash 
you were seeing): that patch was not merged by maintainers in mainline, 
though IIRC it was sent in the right time frame (maybe because they weren't 
marked as urgent, or because they were a lot of patches, which is also 
possible).

About this, we should try for the future (even if this one was a special case, 
having to merge tens of invasive patches for security purposes is not nice) 
to merge big things only before -rc1 and -rc2, since after those releases 
things must calm down. This recommendation must be updated with changes in 
the release cycle followed by Linus, obviously.

Bye
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade


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Re: [uml-devel] 2.6.10-um, /proc/stat is missing information

[Blaisorblade]

Forgot to add to my previous mail: maintaining -bb is a pain, and it was 
intended to be released only when there were big problems in the mainline 
release.

Maintaining it by including only a handful of fixes would not be a lot of 
work, instead... I need more time to do some real development, rather than 
release management - however I hope to learn to manage my time better.

Bye
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade


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Re: [uml-devel] 2.6.10-um, /proc/stat is missing information

[Christopher S. Aker]

> Try retesting after applying update-process-times.patch (the one for the crash 
> you were seeing): that patch was not merged by maintainers in mainline, 
> though IIRC it was sent in the right time frame (maybe because they weren't 
> marked as urgent, or because they were a lot of patches, which is also 
> possible).

# cat /proc/stat 
cpu  93 0 0 0 0 4129 0
cpu0 93 0 0 0 0 4129 0
intr 17406 6535 0 90 0 10414 309 0 0 0 0 1 57 0 0
ctxt 20120
btime 1105664741
processes 1564
procs_running 1
procs_blocked 0

Looks like that was the fix.  And I see it went in with 2.6.10-mm1.

Thanks BB,
-Chris


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