Messages in this thread | | | Date | Fri, 04 Oct 2002 13:12:58 -0700 | From | Dave Hansen <> | Subject | Re: [PATCH] 4KB stack + irq stack for x86 |
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Dave Hansen wrote: > I fixed the problems that I was having. thread_info->preempt_count is > now used to store softirq state, unlike in 2.5.20. Preempt count was > not preserved once the switch to the interrupt stack occurred. This > caused two nested softirqs and a deadlock. It is fixed now.
That'll teach me to get excited and send a patch. Sorry about the "Only in"'s. I also think that there is still a small race window in the code that I sent. I think that the old preempt_count need to be placed into the new thread_info's preempt_count _before_ the stack switch occurs.
-- Dave Hansen haveblue@us.ibm.com
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