search for: no_context

...ll of a sudden, I'm not sure if an upgrade caused this problem. Here's what I got from backtracing: PID: 8136 TASK: ffff8803341aead0 CPU: 2 COMMAND: "" #0 [ffff880028283610] panic at ffffffff815286b8 #1 [ffff880028283690] oops_end at ffffffff8152c8a2 #2 [ffff8800282836c0] no_context at ffffffff81046c1b #3 [ffff880028283710] __bad_area_nosemaphore at ffffffff81046ea5 #4 [ffff880028283760] bad_area_nosemaphore at ffffffff81046f73 #5 [ffff880028283770] __do_page_fault at ffffffff810476d1 #6 [ffff880028283890] do_page_fault at ffffffff8152e7be #7 [ffff8800282838c0] page_fault...

...qd/1 Tainted: G D 3.2.23 #131 [ 100.973270] Call Trace: [ 100.973273] [<ffffffff816674ae>] panic+0x91/0x1a2 [ 100.973278] [<ffffffff8100adb2>] ? check_events+0x12/0x20 [ 100.973282] [<ffffffff81673b0a>] oops_end+0xea/0xf0 [ 100.973286] [<ffffffff81666e6b>] no_context+0x214/0x223 [ 100.973291] [<ffffffff8113cf94>] ? kmem_cache_free+0x104/0x110 [ 100.973295] [<ffffffff8166704b>] __bad_area_nosemaphore+0x1d1/0x1f0 [ 100.973299] [<ffffffff8166707d>] bad_area_nosemaphore+0x13/0x15 [ 100.973304] [<ffffffff816763fb>] do_page_fault+0x35b...

...524.584847] [<c043da92>] ? do_exit+0x1d0/0x62c Feb 10 10:59:45 testbox kernel: [ 524.584850] [<c043bf68>] ? kmsg_dump+0x3a/0xb6 Feb 10 10:59:45 testbox kernel: [ 524.584853] [<c07d555b>] ? oops_end+0xa2/0xa8 Feb 10 10:59:45 testbox kernel: [ 524.584858] [<c07cc31f>] ? no_context+0x128/0x130 Feb 10 10:59:45 testbox kernel: [ 524.584861] [<c07cc441>] ? __bad_area_nosemaphore+0x11a/0x122 Feb 10 10:59:45 testbox kernel: [ 524.584884] [<f81fdd20>] ? btrfs_block_rsv_release+0x51/0x57 [btrfs] Feb 10 10:59:45 testbox kernel: [ 524.584888] [<c07cc460>] ? bad...

...3c6068f80 CPU: 7 COMMAND: "kworker/u16:26" #0 [ffffc900039f76a0] machine_kexec at ffffffff810481fc #1 [ffffc900039f76f0] __crash_kexec at ffffffff81109e3a #2 [ffffc900039f77b0] crash_kexec at ffffffff8110adc9 #3 [ffffc900039f77c8] oops_end at ffffffff8101d059 #4 [ffffc900039f77e8] no_context at ffffffff81055ce5 #5 [ffffc900039f7838] do_page_fault at ffffffff81056c5b #6 [ffffc900039f7860] page_fault at ffffffff81690a88 [exception RIP: report_bug+93] RIP: ffffffff8167227d RSP: ffffc900039f7918 RFLAGS: 00010002 RAX: ffffffffa0229905 RBX: ffffffffa020af0f RCX: 00000000000...

...<ffffffff8103c5c6>] do_exit+0x6d/0x77e [ 0.000000] [<ffffffff8133d43f>] ? _raw_spin_unlock_irqrestore+0x11/0x13 [ 0.000000] [<ffffffff8103ac55>] ? kmsg_dump+0x11e/0x139 [ 0.000000] [<ffffffff8100b936>] oops_end+0x8f/0x94 [ 0.000000] [<ffffffff810239cc>] no_context+0x1f4/0x203 [ 0.000000] [<ffffffff81023b65>] __bad_area_nosemaphore+0x18a/0x1ad [ 0.000000] [<ffffffff81023b96>] bad_area_nosemaphore+0xe/0x10 [ 0.000000] [<ffffffff81023f10>] do_page_fault+0x115/0x229 [ 0.000000] [<ffffffff8133daf5>] page_fault+0x25/0x30 [...

...<ffffffff8103c5c6>] do_exit+0x6d/0x77e [ 0.000000] [<ffffffff8133d43f>] ? _raw_spin_unlock_irqrestore+0x11/0x13 [ 0.000000] [<ffffffff8103ac55>] ? kmsg_dump+0x11e/0x139 [ 0.000000] [<ffffffff8100b936>] oops_end+0x8f/0x94 [ 0.000000] [<ffffffff810239cc>] no_context+0x1f4/0x203 [ 0.000000] [<ffffffff81023b65>] __bad_area_nosemaphore+0x18a/0x1ad [ 0.000000] [<ffffffff81023b96>] bad_area_nosemaphore+0xe/0x10 [ 0.000000] [<ffffffff81023f10>] do_page_fault+0x115/0x229 [ 0.000000] [<ffffffff8133daf5>] page_fault+0x25/0x30 [...

...id: 0 Tainted: G W --------------- T 2.6.32-30-pve #1 >> [ 7.775735] Call Trace: >> [ 7.775735] [<ffffffff81072bd9>] ? add_taint+0x69/0x70 >> [ 7.775735] [<ffffffff8155c443>] ? oops_end+0x53/0xf0 >> [ 7.775735] [<ffffffff8154f0c7>] ? no_context+0x1eb/0x216 >> [ 7.775735] [<ffffffff810cc22e>] ? is_module_text_address+0xe/0x20 >> [ 7.775735] [<ffffffff8154f260>] ? __bad_area_nosemaphore+0x16e/0x18d >> [ 7.775735] [<ffffffff8154f292>] ? bad_area_nosemaphore+0x13/0x15 >> [ 7.775735] [&...

...========================== --- linux-2.6.13.orig/arch/i386/mm/fault.c 2005-08-24 09:30:53.000000000 -0700 +++ linux-2.6.13/arch/i386/mm/fault.c 2005-08-24 09:43:27.000000000 -0700 @@ -562,6 +562,15 @@ vmalloc_fault: pte_k = pte_offset_kernel(pmd_k, address); if (!pte_present(*pte_k)) goto no_context; + + /* + * We have just updated this root with a copy of the kernel + * pmd. To return without flushing would introduce a fault + * loop if running on a hypervisor which uses queued page + * table updates. + */ + update_mmu_cache(vma, address, pte_k); + return; } } Index: linux-...

...========================== --- linux-2.6.13.orig/arch/i386/mm/fault.c 2005-08-24 09:30:53.000000000 -0700 +++ linux-2.6.13/arch/i386/mm/fault.c 2005-08-24 09:43:27.000000000 -0700 @@ -562,6 +562,15 @@ vmalloc_fault: pte_k = pte_offset_kernel(pmd_k, address); if (!pte_present(*pte_k)) goto no_context; + + /* + * We have just updated this root with a copy of the kernel + * pmd. To return without flushing would introduce a fault + * loop if running on a hypervisor which uses queued page + * table updates. + */ + update_mmu_cache(vma, address, pte_k); + return; } } Index: linux-...

Hi, I just want to know if somebody use 2.6.31.4 xenified kernel (aka OpenSUSE) in production? We have been testing it on new Nehalem Xeon server for few weeks w/o any problem. But as soon we tried it on production machine - after several production domUs started - hard OS failure. We had to switch back to 2.6.18.8 - xen stock kernel. Peter _______________________________________________

...ND: "kworker/u16:26" > #0 [ffffc900039f76a0] machine_kexec at ffffffff810481fc > #1 [ffffc900039f76f0] __crash_kexec at ffffffff81109e3a > #2 [ffffc900039f77b0] crash_kexec at ffffffff8110adc9 > #3 [ffffc900039f77c8] oops_end at ffffffff8101d059 > #4 [ffffc900039f77e8] no_context at ffffffff81055ce5 > #5 [ffffc900039f7838] do_page_fault at ffffffff81056c5b > #6 [ffffc900039f7860] page_fault at ffffffff81690a88 > [exception RIP: report_bug+93] > RIP: ffffffff8167227d RSP: ffffc900039f7918 RFLAGS: 00010002 > RAX: ffffffffa0229905 RBX: ffffffffa...

....474098] [<ffffffff8106fca7>] do_exit+0x6a7/0xa20 [ 0.474098] [<ffffffff810be9f8>] ? console_unlock+0x1e8/0x3f0 [ 0.474098] [<ffffffff81d69c60>] ? vty_init+0x174/0x174 [ 0.474098] [<ffffffff8168f4ac>] oops_end+0x9c/0xe0 [ 0.474098] [<ffffffff81683092>] no_context+0x27e/0x28b [ 0.474098] [<ffffffff81d69c60>] ? vty_init+0x174/0x174 [ 0.474098] [<ffffffff81683112>] __bad_area_nosemaphore+0x73/0x1ca [ 0.474098] [<ffffffff813173af>] ? add_uevent_var+0x6f/0x110 [ 0.474098] [<ffffffff81d69c60>] ? vty_init+0x174/0x174 [ 0....

....474098] [<ffffffff8106fca7>] do_exit+0x6a7/0xa20 [ 0.474098] [<ffffffff810be9f8>] ? console_unlock+0x1e8/0x3f0 [ 0.474098] [<ffffffff81d69c60>] ? vty_init+0x174/0x174 [ 0.474098] [<ffffffff8168f4ac>] oops_end+0x9c/0xe0 [ 0.474098] [<ffffffff81683092>] no_context+0x27e/0x28b [ 0.474098] [<ffffffff81d69c60>] ? vty_init+0x174/0x174 [ 0.474098] [<ffffffff81683112>] __bad_area_nosemaphore+0x73/0x1ca [ 0.474098] [<ffffffff813173af>] ? add_uevent_var+0x6f/0x110 [ 0.474098] [<ffffffff81d69c60>] ? vty_init+0x174/0x174 [ 0....

...OS-6.5: crash> bt PID: 106074 TASK: ffff8839c1e32ae0 CPU: 4 COMMAND: "flushd4[cbd-sd-" #0 [ffff8839c2a91900] machine_kexec at ffffffff81038fa9 #1 [ffff8839c2a91960] crash_kexec at ffffffff810c5992 #2 [ffff8839c2a91a30] oops_end at ffffffff81515c90 #3 [ffff8839c2a91a60] no_context at ffffffff81049f1b #4 [ffff8839c2a91ab0] __bad_area_nosemaphore at ffffffff8104a1a5 #5 [ffff8839c2a91b00] bad_area_nosemaphore at ffffffff8104a273 #6 [ffff8839c2a91b10] __do_page_fault at ffffffff8104a9bf #7 [ffff8839c2a91c30] do_page_fault at ffffffff81517bae #8 [ffff8839c2a91c60]...

I''m sure everyone has seen the drop of VMI patches for Linux at this point, but just in case, the link is included below. I''ve read this version of the VMI spec and have made my way through most of the patches. While I wasn''t really that impressed with the first spec wrt Xen, the second version seems to be much more palatable. Specifically, the code inlining and

...5.020828] [<ffffffff8130a563>] ? printk+0x4e/0x5b [ 5.020835] [<ffffffff81051f7b>] ? do_exit+0x72/0x6b5 [ 5.020839] [<ffffffff8100ec72>] ? check_events+0x12/0x20 [ 5.020845] [<ffffffff8130d1bd>] ? oops_end+0xaf/0xb4 [ 5.020851] [<ffffffff8103338c>] ? no_context+0x1e9/0x1f8 [ 5.020856] [<ffffffff81033541>] ? __bad_area_nosemaphore+0x1a6/0x1ca [ 5.020860] [<ffffffff8130e541>] ? do_page_fault+0x2b/0x2fc [ 5.020865] [<ffffffff8130c695>] ? page_fault+0x25/0x30 [ 5.020870] [<ffffffff810badce>] ? __alloc_pages_nodemask+0x8...

...7.775735] Pid: 297, comm: mount veid: 0 Tainted: G W --------------- T 2.6.32-30-pve #1 [ 7.775735] Call Trace: [ 7.775735] [<ffffffff81072bd9>] ? add_taint+0x69/0x70 [ 7.775735] [<ffffffff8155c443>] ? oops_end+0x53/0xf0 [ 7.775735] [<ffffffff8154f0c7>] ? no_context+0x1eb/0x216 [ 7.775735] [<ffffffff810cc22e>] ? is_module_text_address+0xe/0x20 [ 7.775735] [<ffffffff8154f260>] ? __bad_area_nosemaphore+0x16e/0x18d [ 7.775735] [<ffffffff8154f292>] ? bad_area_nosemaphore+0x13/0x15 [ 7.775735] [<ffffffff81047bee>] ? __do_page...

...-rc5/arch/i386/mm/fault.c =================================================================== --- linux-2.6.16-rc5.orig/arch/i386/mm/fault.c 2006-03-10 12:55:05.000000000 -0800 +++ linux-2.6.16-rc5/arch/i386/mm/fault.c 2006-03-10 15:57:08.000000000 -0800 @@ -552,6 +552,13 @@ vmalloc_fault: goto no_context; set_pmd(pmd, *pmd_k); + /* + * Needed. We have just updated this root with a copy of + * the kernel pmd. To return without flushing would + * introduce a fault loop. + */ + update_mmu_cache(NULL, pmd, pmd_k->pmd); + pte_k = pte_offset_kernel(pmd_k, address); if (!pte_pres...

...-rc5/arch/i386/mm/fault.c =================================================================== --- linux-2.6.16-rc5.orig/arch/i386/mm/fault.c 2006-03-10 12:55:05.000000000 -0800 +++ linux-2.6.16-rc5/arch/i386/mm/fault.c 2006-03-10 15:57:08.000000000 -0800 @@ -552,6 +552,13 @@ vmalloc_fault: goto no_context; set_pmd(pmd, *pmd_k); + /* + * Needed. We have just updated this root with a copy of + * the kernel pmd. To return without flushing would + * introduce a fault loop. + */ + update_mmu_cache(NULL, pmd, pmd_k->pmd); + pte_k = pte_offset_kernel(pmd_k, address); if (!pte_pres...

...gt;] do_exit+0x244/0x6da Jun 10 14:50:23 mithrandir kernel: [40871.732005] [<ffffffff810335c9>] ? kmsg_dump+0xcb/0xda Jun 10 14:50:23 mithrandir kernel: [40871.732005] [<ffffffff8100492e>] oops_end+0x89/0x8e Jun 10 14:50:23 mithrandir kernel: [40871.732005] [<ffffffff81396a4c>] no_context+0x1fe/0x20d Jun 10 14:50:23 mithrandir kernel: [40871.732005] [<ffffffffa0d9397f>] ? lookup_extent_mapping+0xaf/0xc2 [btrfs] Jun 10 14:50:23 mithrandir kernel: [40871.732005] [<ffffffff81396be9>] __bad_area_nosemaphore+0x18e/0x1b1 Jun 10 14:50:23 mithrandir kernel: [40871.732005] [&l...