Alan Cox 8155e5d561 Reduce the number of global TLB shootdowns generated by pmap_qenter(). ... Specifically, teach pmap_qenter() to recognize the case when it is being asked to replace a mapping with the very same mapping and not generate a shootdown. Unfortunately, the buffer cache commonly passes an entire buffer to pmap_qenter() when only a subset of the mappings are changing. For the extension of buffers in allocbuf() this was resulting in unnecessary shootdowns. The addition of new pages to the end of the buffer need not and did not trigger a shootdown, but overwriting the initial mappings with the very same mappings was seen as a change that necessitated a shootdown. With this change, that is no longer so. For a "buildworld" on amd64, this change eliminates 14-15% of the pmap_invalidate_range() shootdowns, and about 4% of the overall shootdowns. MFC after: 3 weeks		2010-07-10 18:22:44 +00:00
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acpica	Restore the machine check register banks on resume. For banks being	2010-06-15 18:51:41 +00:00
bios
compile
conf	Import the acpi_aibs(4) driver written by Constantine A. Murenin.	2010-06-25 15:32:46 +00:00
i386	Reduce the number of global TLB shootdowns generated by pmap_qenter().	2010-07-10 18:22:44 +00:00
ibcs2	Regenerate	2010-06-28 18:17:21 +00:00
include	Fix spacing.	2010-07-09 21:27:42 +00:00
isa	After the FPU use requires #MF working due to INT13 FPU exception handling	2010-06-23 11:21:19 +00:00
linux	Regenerate	2010-06-28 18:17:21 +00:00
pci
svr4
xbox
xen	Relax one of the new assertions in pmap_enter() a little. Specifically,	2010-06-11 15:49:39 +00:00
Makefile