John Baldwin wrote:
On Tuesday 24 January 2006 19:34, Craig Boston wrote:
On Tue, Jan 24, 2006 at 10:43:49AM -0500, John Baldwin wrote:
What if you do a read of the lapic before the write? Maybe doing 'x =
lapic->eoi; lapic->eoi = 0;'?
Reading the lapic before the write has no effect.
Reading the lapic after the write makes it work.
Hmm, perhaps the read forces the write to post? Scott?
Either that, or the read imposes enough delay to let whatever was
happening during the DELAY call work. I find it hard to believe that
uncached writes would get delayed like this. I've lost the original
posting on this, could you provide the dmesg and computer make/model
again?
Scott
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