Thread (25 messages) 25 messages, 9 authors, 2003-01-30

Re: Linus rollup

From: Andrew Morton <hidden>
Date: 2003-01-29 10:25:55

"David S. Miller" [off-list ref] wrote:
   From: Russell King [off-list ref]
   Date: Wed, 29 Jan 2003 09:59:49 +0000
   
   	/* This function must be called with interrupts disabled
   
   which hasn't been true for some time, and is even less true now that
   local IRQs don't get disabled.  Does this matter... for UP?

I disable local IRQs during gettimeofday() on sparc.

These locks definitely need to be taken with IRQs disabled.
Why isn't x86 doing that?
Darned if I know.  Looks like Andrea's kernel will deadlock if
arch/i386/kernel/time.c:timer_interrupt() takes i8253_lock
while that cpu is holding the same lock in do_slow_gettimeoffset().

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