Messages in this thread Patch in this message | | | Date | Thu, 07 May 2009 22:35:50 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [BISECTED REGRESSION] Xen: OOPSes on heavy block IO on 2.6.30-master |
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Bryan Donlan wrote: > I've bisected this problem down to the following commit; > unfortunately, there were some rather hairy interdependencies after > that point, so I wasn't able to test reverting it on top of master: > commit 93dbda7cbcd70a0bd1a99f39f44a9ccde8ab9040 > Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> > Date: Thu Feb 26 17:35:44 2009 -0800 >
Thanks for going to the trouble of bisecting this, but I'd just fixed this bug :/
The patch below should fix it.
Thanks again, J
From f26499cadfd057e4377e92ba680e16fa7bdf9422 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Date: Tue, 5 May 2009 13:08:42 -0700 Subject: [PATCH] xen/i386: reserve Xen pagetables
The Xen pagetables are no longer implicitly reserved as part of the other i386_start_kernel reservations, so make sure we explicitly reserve them. This prevents them from being released into the general kernel free page pool and reused.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 0e13477..801d042 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1799,6 +1799,11 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd, pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(swapper_pg_dir))); + reserve_early(__pa(xen_start_info->pt_base), + __pa(xen_start_info->pt_base + + xen_start_info->nr_pt_frames * PAGE_SIZE), + "XEN PAGETABLES"); + return swapper_pg_dir; } #endif /* CONFIG_X86_64 */
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