Hi , I work for Montavista (Cavium Inc) as a Technical Lead . I want to push some of the kernel patches to rt community (2.6.32 kernel 2.6.33 rt patch) , so that It will go to the main line These patches are reviewed and approved by our system Architect. I request you to include in the main line . These issues were reported during econa board bringup at montavista.
Problem Description: Using cge60-econa-cns3420-2.6.32, the kernel failed to boot with the following error: Internal error: Oops: 817 [#1] from cpu 1 PREEMPT SMP last sysfs file: /sys/devices/virtual/bdi/0:19/uevent Modules linked in: hmac ctr deflate CPU: 1 Tainted: G W (2.6.32.46.cge #1) PC is at vfp_notifier+0x48/0xbc LR is at vfp_notifier+0x44/0xbc pc : [] lr : [] psr: 60000013 sp : aeee1d30 ip : aeee1d50 fp : aeee1d4c r10: af8d6460 r9 : ffffffff r8 : af88c000 r7 : a05ba584 r6 : af88c000 r5 : 00000001 r4 : 40000000 r3 : 00000000 r2 : 00000000 r1 : 40000000 r0 : aeee0230 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 00c5787d Table: 2eeec00a DAC: 00000017 Process grep (pid: 1710, stack limit = 0xaeee0270) Stack: from cpu 1 (0xaeee1d30 to 0xaeee2000) Root Cause: On the SMP architecture, last_VFP_context[cpu] becomes NULL because it gets released on a different CPU. How Solved: Fixed by exiting the thread instead of releasing the thread in the vfp_notifier. I request you to include the above patch to the main line kernel . If any questions please contact me at [email protected] ([email protected]) Regards, Shaiju. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
