More details on the telnet with CONFIG_PIN_TLB problems

[benh at kernel.crashing.org]

>I've committed a patch to use 'sync' before changing the PID (to flush
>any loads/stores through the MMU before we change the context) and
>'isync' afterwards to flush the shadow TLBs.  I'm guessing that isync
>flushes both shadow TLBs, not just the ITLB, and that the missing
>infomation is a documentation error.  I've sent some email to the IBM
>PPC support people to check.

Sounds good. In my local tree, I also replaced the icbi's in
flush_dcache_icache & flush_instruction_cache with iccci's to
make sure we don't have stale aliases. I haven't yet checked
glibc for this though.

Ben.


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