Commit-ID: e803b01ba7932a24773fa603a333827904b3492f Gitweb: http://git.kernel.org/tip/e803b01ba7932a24773fa603a333827904b3492f Author: Vegard Nossum <vegard.nossum@xxxxxxxxx> AuthorDate: Sat, 28 Feb 2009 09:29:56 +0100 Commit: Vegard Nossum <vegard.nossum@xxxxxxxxx> CommitDate: Sat, 28 Feb 2009 09:29:56 +0100 kmemcheck: disable CPA self-test CPA tests the present bit of ptes -- a recipe for disaster when kmemcheck is used. It somehow results in our PTEs becoming inaccessible: ERROR: kmemcheck: Fatal error Pid: 1, comm: swapper Tainted: G W 2.6.29-rc6-00892-g9b7ff38-dirty #342 945P-A RIP: 0010:[<ffffffff8023998b>] [<ffffffff8023998b>] kmemcheck_pte_lookup+0x3b/0x50 RSP: 0018:ffff88003f87f788 EFLAGS: 00010046 RAX: ffffc00000000fff RBX: ffffffff81577f2d RCX: 00003ffffffff000 RDX: ffff88003d9b7bb8 RSI: 0000000000000000 RDI: 000000003d9b7063 RBP: ffff88003f87f798 R08: 00000000000000a5 R09: 0000000000000000 R10: ffff88003d9981c0 R11: 0000000000000010 R12: ffffffff802ce7ac R13: ffffffff81577000 R14: 0000000000000004 R15: ffff88003f87f8d8 FS: 0000000000000000(0000) GS:ffff880002701000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: ffff88003f804d60 CR3: 0000000000201000 CR4: 00000000000006a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 [<ffffffff8023817a>] kmemcheck_error_save_bug+0xba/0x100 [<ffffffff80239301>] kmemcheck_access+0xd1/0x4a0 [<ffffffff8023975d>] kmemcheck_fault+0x8d/0x90 [<ffffffff80231f24>] do_page_fault+0x2b4/0x450 [<ffffffff8103a075>] page_fault+0x25/0x30 [<ffffffff80239aa8>] kmemcheck_shadow_lookup+0x28/0x60 [<ffffffff8023941e>] kmemcheck_access+0x1ee/0x4a0 [<ffffffff8023973a>] kmemcheck_fault+0x6a/0x90 [<ffffffff80231f24>] do_page_fault+0x2b4/0x450 [<ffffffff8103a075>] page_fault+0x25/0x30 [<ffffffff80351efc>] sysfs_new_dirent+0x10c/0x120 Will need some more time to figure out this one. This is a temporary fix until we can figure out how to make CPA self-test and kmemcheck compatible. Signed-off-by: Vegard Nossum <vegard.nossum@xxxxxxxxx> --- arch/x86/Kconfig.debug | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index c2c1fb6..42720d2 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -263,6 +263,7 @@ config DEBUG_BOOT_PARAMS config CPA_DEBUG bool "CPA self-test code" depends on DEBUG_KERNEL + depends on !KMEMCHECK ---help--- Do change_page_attr() self-tests every 30 seconds. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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