Messages in this thread |  | | Date | Mon, 01 Oct 2001 09:39:37 -0700 | From | george anzinger <> | Subject | Re: System hangs during interruptible_sleep_on_timeout() under 2.4.9 |
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"Richard B. Johnson" wrote: > > On Thu, 27 Sep 2001, Norbert Roos wrote: > > > Ingo Molnar wrote: > > > > > are you sure timer interrupts are processed while you are waiting for the > > > timeout to expire? I'd suggest to put a: > > > > > > printk("<%d>", irq); > > > > > > into arch/i386/kernel/irq.c:do_IRQ(). > > > > Until the call of interruptible_sleep_on_timeout(), timer interrupts > > were processed. Right after the call no more output is made. > > > [SNIPPED...] > > wait_queue_head_t wait_thing; > > Interruptible_sleep_on_timeount(&wait_thing, timeout), now requires > that "wait_thing" must have been initialized with: > > init_waitqueue_head(&wait_thing); > > If you didn't do this before this object was used, all bets are > off. > > Also, you cannot sleep during an interrupt or when you are holding > a spin-lock that disables interrupts.
Uh? I thought it was BAD BAD BAD form to sleep with ANY spinlocks held!
George > > > __asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */) > > > > (x ist the variable where the IRQ flags are stored) > > I'm not familiar with x86 assembler; is it possible that something can > > go wrong here? > > This is correct. The flags are pushed then popped into the > variable provided. > > Cheers, > Dick Johnson > > Penguin : Linux version 2.4.1 on an i686 machine (799.53 BogoMips). > > I was going to compile a list of innovations that could be > attributed to Microsoft. Once I realized that Ctrl-Alt-Del > was handled in the BIOS, I found that there aren't any. > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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