[PLD 3.x (Th): Bug 94] New: test process hangs in sched_setaffinity()

[btsadmin at pld-linux.org]

http://bugs.pld-linux.org/show_bug.cgi?id=94

           Summary: test process hangs in sched_setaffinity()
           Product: PLD 3.x (Th)
           Version: unspecified
          Platform: All
        OS/Version: PLD Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Core system
        AssignedTo: bugs at pld-linux.org
        ReportedBy: arekm at pld-linux.org
                CC: shadzik at pld-linux.org
   Estimated Hours: 0.0


User-Agent:       Opera/9.50 (X11; Linux i686; U; en)
Build Identifier: kernel-3:2.6.22.16-4.x86_64

Test process stucks in D state:

#include <stdio.h>
#include <sched.h>

int main( void )
{
        cpu_set_t cpu;
        int cpus = 0;
        int ret;
        ret = sched_getaffinity(getpid(), sizeof(cpu), &cpu);
        printf( "cpus = %d, ret = %d\n", cpu, ret );
        sched_setaffinity(getpid(), sizeof(cpu), &cpu);
        printf( "ret = %d\n" );
        return ret;
}

In

Feb  2 20:54:15 arm kernel: a.out         D 0000000000000000     0 17966      1
(NOTLB)
Feb  2 20:54:15 arm kernel: ffff81002c915e68 0000000000000082 ffff810028b00358
0000000000000000
Feb  2 20:54:15 arm kernel: ffffffff80657780 ffffffff80657780 ffffffff806599e0
ffffffff80657780
Feb  2 20:54:15 arm kernel: ffffffff80657780 ffff81000100ea00 ffff81000100ea08
0000000000000000
Feb  2 20:54:15 arm kernel: Call Trace:
Feb  2 20:54:15 arm kernel: [<ffffffff8024f969>] remove_wait_queue+0x19/0x60
Feb  2 20:54:15 arm kernel: [<ffffffff804a1169>]
__mutex_lock_slowpath+0xa9/0x260
Feb  2 20:54:15 arm kernel: [<ffffffff80281434>] cpuset_cpus_allowed+0x14/0x50
Feb  2 20:54:15 arm kernel: [<ffffffff8028279f>]
cpuset_set_cpus_affinity+0x5f/0x80
Feb  2 20:54:15 arm kernel: [<ffffffff80231d4b>] sched_setaffinity+0x10b/0x130
Feb  2 20:54:15 arm kernel: [<ffffffff80231dad>]
sys_sched_setaffinity+0x3d/0x60
Feb  2 20:54:15 arm kernel: [<ffffffff8020a40c>] tracesys+0xdc/0xe1


Reproducible: Always

Steps to Reproduce:
1.
2.
3.


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