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authorAndi Kleen <ak@suse.de>2007-06-20 12:23:36 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-20 14:27:26 -0700
commit018d2ad0cccfa9bb8bee1d160c353e568484a137 (patch)
treeb50362cead47a3b472a6b645a9e7dd0262a757f9 /arch/x86_64
parent55181000cd60334fe920c65ffbcdfe0e3f1de406 (diff)
downloadlinux-2.6.34-ux500-018d2ad0cccfa9bb8bee1d160c353e568484a137.tar.gz
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 <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/mm/pageattr.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86_64/mm/pageattr.c b/arch/x86_64/mm/pageattr.c
index d653d0bf3df..9148f4a4cec 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);