aboutsummaryrefslogtreecommitdiffstats
path: root/arch/i386/mm
diff options
context:
space:
mode:
authorZachary Amsden <zach@vmware.com>2007-08-21 21:30:36 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-22 14:10:47 -0400
commit8b14cb9953c6b569327e9372718cff09a98f9589 (patch)
treeb4eeaa2cb428fc6471c0f124cb8bb9e23de03273 /arch/i386/mm
parentcb00e99c0abd844b884c64c6b54aa3b7d345ebb1 (diff)
Fix lazy mode vmalloc synchronization for paravirt
Touching vmalloc memory in the middle of a lazy mode update can generate a kernel PDE update, which must be flushed immediately. The fix is to leave lazy mode when doing a vmalloc sync. Signed-off-by: Zachary Amsden <zach@vmware.com> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/i386/mm')
-rw-r--r--arch/i386/mm/fault.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c
index 01ffdd4964f0..fcb38e7f3543 100644
--- a/arch/i386/mm/fault.c
+++ b/arch/i386/mm/fault.c
@@ -249,9 +249,10 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
249 pmd_k = pmd_offset(pud_k, address); 249 pmd_k = pmd_offset(pud_k, address);
250 if (!pmd_present(*pmd_k)) 250 if (!pmd_present(*pmd_k))
251 return NULL; 251 return NULL;
252 if (!pmd_present(*pmd)) 252 if (!pmd_present(*pmd)) {
253 set_pmd(pmd, *pmd_k); 253 set_pmd(pmd, *pmd_k);
254 else 254 arch_flush_lazy_mmu_mode();
255 } else
255 BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k)); 256 BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
256 return pmd_k; 257 return pmd_k;
257} 258}