Re: Fwd: Re: buildworld panics with yesterday's kernel ...

[Hiten Pandya <hmp@xxxxxxxxxxxxx>]

Matthew Dillon wrote:
>     Andrew, I fixed it.  I was calling pmap_qremove() with a bad argument
>     in pmap_unmapdev().  It was totally my fault.  Damn. :-)
>
>     I've committed an update to i386/i386/pmap.c, also included below.
>
>     Note that the filesystem corruption you were getting prior to this
>     commit was related to the same pmap_unmapdev code... the original
>     FBsd code failed to remove the pte's that had been installed, which
>     can corrupt kernel_map.  The older incarnation of the FP code could
>     also cause corruption.  Since ACPICA and ACPICA5 are the only ones
>     that actually call pmap_unmapdev(), this tended to result in corruption
>     for people running acpica which is why it was so hard to track down.
>     I had added the qremove to remove the pte's and fix the corruption,
>     but I got the arguments wrong :-(.

	Hmm, very interesting.  I was see'ing HTTP corruption on one
	of David's SMP test machines, which has ACPI but could not
	figure out the cause... quite Strange. :-)

		-Hiten
		hmp@xxxxxxxxxxxxx