Re: [PATCH] ia64: disable preemption in udelay()

From: John Hawkes <hawkes_at_sgi.com>
Date: 2005-12-17 05:39:34
From: "Luck, Tony" <tony.luck@intel.com>
...
> A good question ... I'm going to put John's change in as-is for now so
> that 2.6.15 can benefit from the reduced code size of the out-of-line
> and avoid the ugly bug when preemption is enabled on a drifty system.

Okay, but I'll propose some changes to that soon, probably using Robin Holt's
suggestions.  I'm concerned about the impact of interrupts outside of the
inner loop and inside the outer loop, which would increase the effective delay
time.

John Hawkes

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Received on Sat Dec 17 05:41:59 2005

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