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[Xen-devel] [patch] pae/smp fix
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] [patch] pae/smp fix |
| From: | Gerd Knorr <kraxel@xxxxxxx> |
| Date: | Tue, 9 Aug 2005 12:54:34 +0200 |
| Delivery-date: | Tue, 09 Aug 2005 10:58:20 +0000 |
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Hi,
We'll have to make the pmd's writable on release ...
For the UP case the mm_umpin() in _arch_exit_mmap() is
good enougth, for SMP it isn't ...
Gerd
--- arch/xen/i386/mm/pgtable.c.smp 2005-08-09 12:48:31.992742653 +0200
+++ arch/xen/i386/mm/pgtable.c 2005-08-09 12:48:50.853202203 +0200
@@ -359,6 +359,7 @@
if (PTRS_PER_PMD > 1) {
for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
+ make_page_writable(pmd);
kmem_cache_free(pmd_cache, pmd);
}
if (!HAVE_SHARED_KERNEL_PMD) {
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