Revision ca71ba4d0cfcf5f7a8e9b24339547b5a72299f80 authored by John Baldwin on 26 January 2010, 20:58:09 UTC, committed by John Baldwin on 26 January 2010, 20:58:09 UTC
Optimize the cache flushing done when changing caching attributes of pages by doing nothing for CPUs that support self-snooping and using CLFLUSH instead of a full cache invalidate when possible. - On i386 take care of possible mappings of the page by sf buffer by utilizing the mapping for clflush, otherwise map the page transiently. Amd64 uses the direct map. - Do not use CLFLUSH on Intel CPUs due to problems with flushing the local APIC range by default. This can be further controlled via the hw.clflush_disable loader tunable. A setting of 1 disables the use of CLFLUSH. A setting of 0 allows CLFLUSH to be used for Intel CPUs when CPUID_SS is not present. Approved by: re (kib)
1 parent a6a19cb
File | Mode | Size |
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amd64 | ||
arm | ||
boot | ||
bsm | ||
cam | ||
cddl | ||
compat | ||
conf | ||
contrib | ||
crypto | ||
ddb | ||
dev | ||
fs | ||
gdb | ||
geom | ||
gnu | ||
i386 | ||
i4b | ||
ia64 | ||
isa | ||
kern | ||
libkern | ||
modules | ||
net | ||
net80211 | ||
netatalk | ||
netgraph | ||
netinet | ||
netinet6 | ||
netipsec | ||
netipx | ||
netnatm | ||
netncp | ||
netsmb | ||
nfs | ||
nfs4client | ||
nfsclient | ||
nfsserver | ||
nlm | ||
opencrypto | ||
pc98 | ||
pccard | ||
pci | ||
powerpc | ||
rpc | ||
security | ||
sparc64 | ||
sun4v | ||
sys | ||
tools | ||
ufs | ||
vm | ||
xdr | ||
Makefile | -rw-r--r-- | 1.4 KB |
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