Re: Fw: [PATCH] ia64: race flushing icache in do_no_page path

From: Nick Piggin
Date: Fri Apr 27 2007 - 23:05:36 EST

Nick Piggin wrote:

What if you were to say remove all the PG_arch_1 code, and do something
really simple like flush icache in flush_dcache_page? Would performance
suffer horribly?

OIC, you need a virtual address to evict the icache, so you can't
flush at flush_dcache time? Or does ia64 have an instruction to
flush the whole icache? (it would be worth testing, to see how much
performance suffers).

SUSE Labs, Novell Inc.
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