Messages in this thread | | | Date | Wed, 24 Dec 2008 22:36:17 +1100 | From | Herbert Xu <> | Subject | Re: asterisk hangs with RT priority |
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On Sun, May 18, 2008 at 06:10:03PM +0200, Patrick McHardy wrote: > I'm seeing hanging asterisk processes on startup when using > RT priority with current -git. Unfortunately I'm not sure about > the last working version, but it was one of the final 2.6.25 rcs. > The hang stops when executing "schedtool -N $(pidof asterisk)".
I'm now hitting exactly the same problem with 2.6.28-rc9 (I had it with 2.6.27 too but thought it might go away on its own :)
I've made a small program to attempt to reproduce this based on the asterisk code. Unfortunately it doesn't work on its own. However, if you run it under strace then it does hang in the same away as asterisk (which seems to happen after the setuid call, as strace shows it before hanging and the printk after it in asterisk gets executed).
Note that the hang goes away if either setscheduler or setuid is removed.
#include <sched.h>
int main(void) { struct sched_param sched = {.sched_priority = 10};
sched_setscheduler(0, SCHED_RR, &sched); setuid(106); return 0; }
Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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