Messages in this thread | | | Date | Sun, 05 May 2002 02:24:07 +0200 | From | Martin Dalecki <> | Subject | Re: 2.5.13 IDE and preemptible kernel problems |
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Użytkownik Linus Torvalds napisał: > > On Fri, 3 May 2002, Martin Dalecki wrote: > > >>Uz.ytkownik Andi Kleen napisa?: >> >>>Hi, >>> >>>When booting an preemptible kernel 2.5.13 kernel on x86-64 I get >>>very quickly an scheduling in interrupt BUG. It looks like the >>>preempt_count becomes 0 inside the ATA interrupt handler. This >>>could happen when save_flags/restore_flags and friends are unmatched >>>and you have too many flags restores in IDE. >> >>Thank you for pointing out. I will re check it. > > > Martin, may I suggest that the next line of cleanups should be to remove > all vestiges of the old global interrupt locking from the IDE driver? > Including, for example, the crap "PCI method 1" access stuff in CMD640x.. > > Also, if you turn on spinlock debugging, that tends to help find the > really silly things faster (leaving the harder races to be solved by > brainforce ;)
OK, lest's make a deal you do the following and - realize immediately that there is a need for single argument time_past() or whatever and I turn spinlock debugging on :-).
[root@kozaczek linux]# find ./ -name "*.[ch]" -exec grep time_after /dev/null {} \; | wc 265 1638 21285 [root@kozaczek linux]# find ./ -name "*.[ch]" -exec grep time_after /dev/null {} \; | grep jiffies | wc 239 1497 19080 [root@kozaczek linux]#
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