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| author | Andi Kleen <ak@suse.de> | 2007-06-20 12:23:36 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-20 14:27:26 -0700 |
| commit | 018d2ad0cccfa9bb8bee1d160c353e568484a137 (patch) | |
| tree | b50362cead47a3b472a6b645a9e7dd0262a757f9 /arch/x86_64 | |
| parent | 55181000cd60334fe920c65ffbcdfe0e3f1de406 (diff) | |
| download | linux-3.10-018d2ad0cccfa9bb8bee1d160c353e568484a137.tar.gz linux-3.10-018d2ad0cccfa9bb8bee1d160c353e568484a137.tar.bz2 linux-3.10-018d2ad0cccfa9bb8bee1d160c353e568484a137.zip | |
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.c | 7 |
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); |