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| author | Ian Campbell <ian.campbell@citrix.com> | 2009-11-21 14:32:49 +0300 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-12-03 22:14:51 +0300 |
| commit | fa24ba62ea2869308ffc9f0b286ac9650b4ca6cb (patch) | |
| tree | 7b7ffaaf3d99dde280ef75d83813ed110113338f /arch | |
| parent | 3905bb2aa7bb801b31946b37a4635ebac4009051 (diff) | |
| download | linux-fa24ba62ea2869308ffc9f0b286ac9650b4ca6cb.tar.xz | |
xen: correctly restore pfn_to_mfn_list_list after resume
pvops kernels >= 2.6.30 can currently only be saved and restored once. The
second attempt to save results in:
ERROR Internal error: Frame# in pfn-to-mfn frame list is not in pseudophys
ERROR Internal error: entry 0: p2m_frame_list[0] is 0xf2c2c2c2, max 0x120000
ERROR Internal error: Failed to map/save the p2m frame list
I finally narrowed it down to:
commit cdaead6b4e657f960d6d6f9f380e7dfeedc6a09b
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Date: Fri Feb 27 15:34:59 2009 -0800
xen: split construction of p2m mfn tables from registration
Build the p2m_mfn_list_list early with the rest of the p2m table, but
register it later when the real shared_info structure is in place.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
The unforeseen side-effect of this change was to cause the mfn list list to not
be rebuilt on resume. Prior to this change it would have been rebuilt via
xen_post_suspend() -> xen_setup_shared_info() -> xen_setup_mfn_list_list().
Fix by explicitly calling xen_build_mfn_list_list() from xen_post_suspend().
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stable Kernel <stable@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/xen/mmu.c | 2 | ||||
| -rw-r--r-- | arch/x86/xen/suspend.c | 2 | ||||
| -rw-r--r-- | arch/x86/xen/xen-ops.h | 1 |
3 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 3bf7b1d250ce..bf4cd6bfe959 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -185,7 +185,7 @@ static inline unsigned p2m_index(unsigned long pfn) } /* Build the parallel p2m_top_mfn structures */ -static void __init xen_build_mfn_list_list(void) +void xen_build_mfn_list_list(void) { unsigned pfn, idx; diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c index 95be7b434724..6343a5d8e93c 100644 --- a/arch/x86/xen/suspend.c +++ b/arch/x86/xen/suspend.c @@ -27,6 +27,8 @@ void xen_pre_suspend(void) void xen_post_suspend(int suspend_cancelled) { + xen_build_mfn_list_list(); + xen_setup_shared_info(); if (suspend_cancelled) { diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index 32529326683d..f9153a300bce 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -25,6 +25,7 @@ extern struct shared_info *HYPERVISOR_shared_info; void xen_setup_mfn_list_list(void); void xen_setup_shared_info(void); +void xen_build_mfn_list_list(void); void xen_setup_machphys_mapping(void); pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn); void xen_ident_map_ISA(void); |