lkml.org 
[lkml]   [2007]   [Jun]   [4]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateMon, 4 Jun 2007 09:25:11 -0400 (EDT)
FromJames Morris <>
SubjectRe: [bug] very high non-preempt latency in context_struct_compute_av()
On Mon, 4 Jun 2007, Ingo Molnar wrote:

> 
> a simple ssh login triggers a ~130 msecs non-preemptible latency even 
> with CONFIG_PREEMPT enabled, on a fast Core2Duo CPU (!).

Thanks for the report.

> 
> the latency is caused by a _very_ long loop in the SELinux code:
> 
>     sshd-4828  0.N.. 465894us : avtab_search_node (context_struct_compute_av)

What do the 0DNs fields mean and what did you use to create this trace?


- James
-- 
James Morris
<jmorris@namei.org>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-06-04 15:27    [from the cache]
©2003-2008