Messages in this thread | | | Subject | Re: 2.4.19-pre3 s390 ret_from_fork patch | From | "Martin Schwidefsky" <> | Date | Mon, 18 Mar 2002 15:04:09 +0100 |
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>The 2.4.19-pre3 works just dandy as it is without this patch, >but it is needed for O(1) scheduler. I think Martin was going >to forward this into 2.5.x tree, where O(1) is standard. > >The problem is that schedule_tail() is supposed to unlock >runqueue, but if interrupts are enabled before that happens, >a timer tick may squeeze in and deadlock. I observed such >situation myself. > >So, I would like this to be in 2.4.19 for the sake of O(1) users. >Any objections?
No, not really. My fix for 2.5.6 simply removes the stosm because the sysc_return will disable the interrupts soon after anyway.
blue skies, Martin
Linux/390 Design & Development, IBM Deutschland Entwicklung GmbH Schönaicherstr. 220, D-71032 Böblingen, Telefon: 49 - (0)7031 - 16-2247 E-Mail: schwidefsky@de.ibm.com
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