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

From: Hugh Dickins
Date: Sat Apr 28 2007 - 01:20:44 EST

On Sat, 28 Apr 2007, Nick Piggin wrote:
> 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).

I'm puzzled by that remark: the ia64 flush_icache_range always has
a virtual address, it uses the kernel virtual address; it takes no
interest in whether there's a user virtual address.

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