From 018d2ad0cccfa9bb8bee1d160c353e568484a137 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Wed, 20 Jun 2007 12:23:36 +0200 Subject: x86: change_page_attr bandaids - Disable CLFLUSH again; it is still broken. Always do WBINVD. - Always flush in the i386 case, not only when there are deferred pages. These are both brute-force inefficient fixes, to be improved next release cycle. The changes to i386 are a little more extensive than strictly needed (some dead code added), but it is more similar to the x86-64 version now and the dead code will be used soon. Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/x86_64/mm/pageattr.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'arch/x86_64/mm') diff --git a/arch/x86_64/mm/pageattr.c b/arch/x86_64/mm/pageattr.c index d653d0bf3df6..9148f4a4cec6 100644 --- a/arch/x86_64/mm/pageattr.c +++ b/arch/x86_64/mm/pageattr.c @@ -74,10 +74,11 @@ static void flush_kernel_map(void *arg) struct page *pg; /* When clflush is available always use it because it is - much cheaper than WBINVD */ - if (!cpu_has_clflush) + much cheaper than WBINVD. Disable clflush for now because + the high level code is not ready yet */ + if (1 || !cpu_has_clflush) asm volatile("wbinvd" ::: "memory"); - list_for_each_entry(pg, l, lru) { + else list_for_each_entry(pg, l, lru) { void *adr = page_address(pg); if (cpu_has_clflush) cache_flush_page(adr); -- cgit v1.2.2