Alan Cox a971139680 Correct a long-standing error in _pmap_unwire_pte_hold() affecting ... multiprocessors. Specifically, the error is conditioning the call to pmap_invalidate_page() on whether the pmap is active on the current CPU. This call must be unconditional. Regardless of whether the pmap is active on the CPU performing _pmap_unwire_pte_hold(), it could be active on another CPU. For example, a call to pmap_remove_all() by the page daemon could result in a call to _pmap_unwire_pte_hold() with the pmap inactive on the current CPU and active on another CPU. In such circumstances, failing to call pmap_invalidate_page() results in a stale TLB entry on the other CPU that still maps the now deallocated page table page. What happens next is typically a mysterious panic in pmap_enter() by the other CPU, either "pmap_enter: attempted pmap_enter on 4MB page" or "pmap_enter: pte vanished, va: 0x%lx". Both occur because the former page table page has been recycled and allocated to a new purpose. Consequently, it no longer contains zeroes. See also Peter's i386/i386/pmap.c revision 1.448 and the related e-mail thread last year. Many thanks to the engineers at Sandvine for providing clear and concise information until all of the pieces of the puzzle fell into place and for testing an earlier patch. MT5 Candidate		2004-09-22 05:01:48 +00:00
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acpica	Be sure to always unlock the sx lock when exiting the sysctl function.	2004-08-24 17:53:25 +00:00
bios	Clarify SDT feature word bits.	2004-08-31 21:51:51 +00:00
compile
conf	Put in a commented out ispfw device under isp and note that this is usually	2004-09-19 00:52:22 +00:00
cpufreq	o Fix whitespace bug introduced in the previous commit.	2004-08-23 10:09:29 +00:00
i386	Correct a long-standing error in _pmap_unwire_pte_hold() affecting	2004-09-22 05:01:48 +00:00
ibcs2	Regenerate after fcntl() wrappers were marked MP safe.	2004-08-24 20:24:34 +00:00
include	Fix breakpoint handling for i386.	2004-09-15 23:26:49 +00:00
isa	Add new a function isa_dma_init() which returns an errno when it fails	2004-09-15 12:09:50 +00:00
linux	Regen.	2004-09-06 09:33:30 +00:00
pci	Consistently use __inline instead of __inline__ as the former is an empty macro	2004-07-04 16:11:03 +00:00
svr4	Attempt to make the proper changes here for the proc.h commit:	2004-01-05 00:29:00 +00:00
Makefile