* Dinakar Guniguntala <[email protected]> wrote:
> I was wondering why the following change was made from -rt14
> onwards.
>
>
> @@ -1634,7 +1531,7 @@ asmlinkage long sys_futex(u32 __user *ua
> int val3)
> {
> struct timespec t;
> - unsigned long timeout = MAX_SCHEDULE_TIMEOUT;
> + unsigned long timeout = 0;
>
> This was introduced in patch-2.6.14-rt13-rf3 by David.
>
> This seems to return spurious -ETIMEDOUT errors even in the non-robust
> code and results in userspace (glibc) retrying several mutex
> operations before it succeeds. I was chasing down a degradation of
> performance of some testcases and was able to fix those by reverting
> this change back.
nice catch! I've undone this change in my tree.
Ingo
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