4c0e268adf
TLB shootdown requirements. Otherwise a CPU may not get the needed TLB invalidation. The PTE valid and access flags can not be used here to avoid TLB shootdowns unless sf->cpumask == all_cpus. ( Otherwise some CPUs may still hold an even older entry in the TLB) Since sf_buf_alloc mappings are normally always used this is also not really useful and presetting accessed and modified allows the CPU to speculatively load the entry into the TLB. Both bugs can cause random data corruption. MFC after: 3 days |
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acpica | ||
bios | ||
compile | ||
conf | ||
cpufreq | ||
i386 | ||
ibcs2 | ||
include | ||
isa | ||
linux | ||
pci | ||
svr4 | ||
Makefile |