* Stephen Smalley <[email protected]> wrote:
> Can you try the patch below to see whether it helps?
>
> In security_get_user_sids, move the transition permission checks
> outside of the section holding the policy rdlock, and use the AVC to
> perform the checks, calling cond_resched after each one. These
> changes should allow preemption between the individual checks and
> enable caching of the results. It may however increase the overall
> time spent in the function in some cases, particularly in the cache
> miss case.
>
> The long term fix will be to take much of this logic to userspace by
> exporting additional state via selinuxfs, and ultimately deprecating
> and eliminating this interface from the kernel.
>
> Signed-off-by: Stephen Smalley <[email protected]>
i have just tried your patch and it completely solves the issue! Without
the patch, a simple script that keeps logging in on a box:
while :; do ssh testbox true; done
would cause glxgears to get into a very jerky motion due to the
latencies. With the patch it's 100%, totally smooth! Thanks!
Tested-by: Ingo Molnar <[email protected]>
Ingo
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