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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-08-17 15:35:31 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-08-23 17:52:17 +0200 |
| commit | 328731876451a837f56e66ffa11de053ed5daf73 (patch) | |
| tree | 83a64eb62544e21474a18baf5f3d056d51b48a29 /arch | |
| parent | xen/p2m: When revectoring deal with holes in the P2M array. (diff) | |
| download | linux-328731876451a837f56e66ffa11de053ed5daf73.tar.xz linux-328731876451a837f56e66ffa11de053ed5daf73.zip | |
xen/mmu: If the revector fails, don't attempt to revector anything else.
If the P2M revectoring would fail, we would try to continue on by
cleaning the PMD for L1 (PTE) page-tables. The xen_cleanhighmap
is greedy and erases the PMD on both boundaries. Since the P2M
array can share the PMD, we would wipe out part of the __ka
that is still used in the P2M tree to point to P2M leafs.
This fixes it by bypassing the revectoring and continuing on.
If the revector fails, a nice WARN is printed so we can still
troubleshoot this.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/xen/mmu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 5b2cb54425ce..cb9db72b33f8 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1238,7 +1238,8 @@ static void __init xen_pagetable_setup_done(pgd_t *base) memblock_free(__pa(xen_start_info->mfn_list), size); /* And revector! Bye bye old array */ xen_start_info->mfn_list = new_mfn_list; - } + } else + goto skip; } /* At this stage, cleanup_highmap has already cleaned __ka space * from _brk_limit way up to the max_pfn_mapped (which is the end of @@ -1259,6 +1260,7 @@ static void __init xen_pagetable_setup_done(pgd_t *base) * anything at this stage. */ xen_cleanhighmap(MODULES_VADDR, roundup(MODULES_VADDR, PUD_SIZE) - 1); #endif +skip: #endif xen_post_allocator_init(); } |