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BUG [preempt-rt] stapio:4521 task might have lost a preemption check!
- From: Kiran <kiran at linux dot vnet dot ibm dot com>
- To: systemtap at sources dot redhat dot com
- Cc: sripathik at in dot ibm dot com
- Date: Tue, 16 Jun 2009 16:22:34 +0530
- Subject: BUG [preempt-rt] stapio:4521 task might have lost a preemption check!
Hi,
When I run systemtap example scripts on the mainline RT kernel
2.6.29.4-rt16 on power machine, I get the following bug
BUG: stapio:4521 task might have lost a preemption check!
Call Trace:
[c0000000e0ba3930] [c0000000000122e8] .show_stack+0x94/0x198 (unreliable)
[c0000000e0ba39e0] [c000000000012414] .dump_stack+0x28/0x3c
[c0000000e0ba3a60] [c0000000000a688c] .preempt_enable_no_resched+0x68/0x84
[c0000000e0ba3ae0] [d0000000017368d0] .enter_be_probe+0x278/0x29c [stap_828d9711d4343f96e62db9359ace031f_8344]
[c0000000e0ba3b80] [d000000001737520] ._stp_ctl_write_cmd+0x5f8/0x7c8 [stap_828d9711d4343f96e62db9359ace031f_8344]
[c0000000e0ba3cd0] [c00000000016de10] .vfs_write+0xf0/0x1c4
[c0000000e0ba3d80] [c00000000016e01c] .SyS_write+0x6c/0xb8
[c0000000e0ba3e30] [c000000000008570] syscall_exit+0x0/0x40
Any pointers on how to resolve this bug would be helpful.
--
Thanks,
Kiran