Re: utrace, RCU and ia64

2007-04-17 Thread Alexey Dobriyan
[double freeing of struct utrace leading to oops in __rcu_process_callbacks] Hi, Roland, utrace debugging you've put into 2.6.21-rc6-mm1 helped. Two double-frees reproduced: 1) BUG at kernel/utrace.c:176 rcu_utrace_free utrace_reap utrace_release_task release_task

Re: utrace, RCU and ia64

2007-03-29 Thread Roland McGrath
Thanks for the reports. I have a handle on a bug that probably is at fault, and I'm working on a fix. Thanks, Roland - 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-in

utrace, RCU and ia64

2007-03-29 Thread Alexey Dobriyan
Hi, Roland, Andrew. Something really sick is going on with combination of utrace, RCU and ia64. Below are quickly reproducable oops happenning on 8-way SMP, my lame-o attempts to decode it, and test program itself. I checked 2.6.21-rc5 which was OK, 2.6.21-rc5 + linux-2.6.21-current