Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753487Ab3JIMTR (ORCPT ); Wed, 9 Oct 2013 08:19:17 -0400 Received: from mga11.intel.com ([192.55.52.93]:59456 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751897Ab3JIMTP (ORCPT ); Wed, 9 Oct 2013 08:19:15 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.90,1063,1371106800"; d="s'?scan'208";a="408250140" Date: Wed, 9 Oct 2013 20:19:11 +0800 From: Fengguang Wu To: Oleg Nesterov Cc: Linus Torvalds , Peter Zijlstra , Ingo Molnar , Linux Kernel Mailing List Subject: Re: [x86] BUG: unable to handle kernel paging request at 00740060 Message-ID: <20131009121911.GA18770@localhost> References: <20131005234430.GA22485@localhost> <20131008143400.GA14721@redhat.com> <20131009080459.GA2298@localhost> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="cNdxnHkX5QqsyA0e" Content-Disposition: inline In-Reply-To: <20131009080459.GA2298@localhost> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8873 Lines: 309 --cNdxnHkX5QqsyA0e Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > > Fengguang, I do not think this will help, but just in case. Could you > > show the result of > > > > $ kernel/task_work.s Update: I recompiled the kernel with gcc 4.4.7 and find it booting fine! Attached is the new kernel/task_work.s. Thanks, Fengguang --cNdxnHkX5QqsyA0e Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="task_work.s" .file "task_work.c" # GNU C (Debian 4.4.7-4) version 4.4.7 (x86_64-linux-gnu) # compiled by GNU C version 4.4.7, GMP version 5.1.1, MPFR version 3.1.1-p2. # warning: GMP header version 5.1.1 differs from library version 5.0.2. # GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 # options passed: -nostdinc -I/c/wfg/tip/arch/x86/include # -Iarch/x86/include/generated -I/c/wfg/tip/include -Iinclude # -I/c/wfg/tip/arch/x86/include/uapi -Iarch/x86/include/generated/uapi # -I/c/wfg/tip/include/uapi -Iinclude/generated/uapi -I/c/wfg/tip/kernel # -Ikernel -imultilib 32 -imultiarch i386-linux-gnu -D__KERNEL__ # -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 # -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 # -DKBUILD_STR(s)=#s -DKBUILD_BASENAME=KBUILD_STR(task_work) # -DKBUILD_MODNAME=KBUILD_STR(task_work) -isystem # /usr/lib/gcc/x86_64-linux-gnu/4.4.7/include -include # /c/wfg/tip/include/linux/kconfig.h -MD kernel/.task_work.s.d # /c/wfg/tip/kernel/task_work.c -m32 -msoft-float -mregparm=3 # -mpreferred-stack-boundary=2 -march=winchip2 -maccumulate-outgoing-args # -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -auxbase-strip # kernel/task_work.s -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs # -Werror-implicit-function-declaration -Wno-format-security # -Wno-sign-compare -Wframe-larger-than=1024 -Wdeclaration-after-statement # -Wno-pointer-sign -p -fno-strict-aliasing -fno-common # -fno-delete-null-pointer-checks -freg-struct-return -fno-pic # -ffreestanding -fno-asynchronous-unwind-tables -fno-stack-protector # -fno-omit-frame-pointer -fno-optimize-sibling-calls -fno-strict-overflow # -fconserve-stack -fverbose-asm # options enabled: -falign-loops -fargument-alias -fauto-inc-dec # -fbranch-count-reg -fcaller-saves -fcprop-registers -fcrossjumping # -fcse-follow-jumps -fdefer-pop -fdwarf2-cfi-asm -fearly-inlining # -feliminate-unused-debug-types -fexpensive-optimizations # -fforward-propagate -ffunction-cse -fgcse -fgcse-lm # -fguess-branch-probability -fident -fif-conversion -fif-conversion2 # -findirect-inlining -finline -finline-functions-called-once # -finline-small-functions -fipa-cp -fipa-pure-const -fipa-reference # -fira-share-save-slots -fira-share-spill-slots -fivopts # -fkeep-static-consts -fleading-underscore -fmath-errno -fmerge-constants # -fmerge-debug-strings -fmove-loop-invariants -foptimize-register-move # -fpeephole -fpeephole2 -fprofile -freg-struct-return -fregmove # -freorder-blocks -freorder-functions -frerun-cse-after-loop # -fsched-interblock -fsched-spec -fsched-stalled-insns-dep -fsigned-zeros # -fsplit-ivs-in-unroller -fsplit-wide-types -fthread-jumps # -ftoplevel-reorder -ftrapping-math -ftree-builtin-call-dce -ftree-ccp # -ftree-ch -ftree-copy-prop -ftree-copyrename -ftree-cselim -ftree-dce # -ftree-dominator-opts -ftree-dse -ftree-fre -ftree-loop-im # -ftree-loop-ivcanon -ftree-loop-optimize -ftree-parallelize-loops= # -ftree-pre -ftree-reassoc -ftree-scev-cprop -ftree-sink -ftree-sra # -ftree-switch-conversion -ftree-ter -ftree-vect-loop-version -ftree-vrp # -funit-at-a-time -fvect-cost-model -fverbose-asm # -fzero-initialized-in-bss -m32 -m96bit-long-double # -maccumulate-outgoing-args -malign-stringops -mfused-madd -mglibc # -mieee-fp -mno-fancy-math-387 -mno-red-zone -mno-sse4 -mpush-args -msahf # -mtls-direct-seg-refs # Compiler executable checksum: f7c11247ad5a53a602823d9bd673a474 .section .rodata.str1.1,"aMS",@progbits,1 .LC0: .string "/c/wfg/tip/kernel/task_work.c" .text .p2align 4,,15 .globl task_work_run .type task_work_run, @function task_work_run: pushl %ebp # movl %esp, %ebp #, pushl %edi # pushl %esi # pushl %ebx # call mcount #APP # 14 "/c/wfg/tip/arch/x86/include/asm/current.h" 1 movl current_task,%edi #, task # 0 "" 2 #NO_APP leal 904(%edi), %ebx #, D.18648 .p2align 4,,15 .L15: movl (%ebx), %edx #* D.18648, work testl %edx, %edx # work je .L17 #, .L2: xorl %ecx, %ecx # head.458 .L3: movl %edx, %eax # work, __ret #APP # 99 "/c/wfg/tip/kernel/task_work.c" 1 cmpxchgl %ecx,(%ebx) # head.458,* D.18648 # 0 "" 2 #NO_APP cmpl %eax, %edx # __ret, work jne .L15 #, testl %edx, %edx # work je .L10 #, .p2align 4,,15 .L12: #APP # 656 "/c/wfg/tip/arch/x86/include/asm/processor.h" 1 rep; nop # 0 "" 2 #NO_APP movl 960(%edi), %eax # .pi_lock.raw_lock.slock, D.18658 testl %eax, %eax # D.18658 je .L12 #, xorl %esi, %esi # head jmp .L8 # .p2align 4,,15 .L18: movl %edx, %esi # work, head movl %eax, %edx # next, work .L8: movl (%edx), %eax # .next, next movl %esi, (%edx) # head, .next testl %eax, %eax # next jne .L18 #, jmp .L9 # .p2align 4,,15 .L17: testb $4, 12(%edi) #, .flags je .L2 #, movl $work_exited, %ecx #, head.458 jmp .L3 # .p2align 4,,15 .L19: movl %esi, %edx # work.461, work movl (%esi), %esi # .next, work.461 .L9: movl %edx, %eax # work, call *4(%edx) # .func xorl %ecx, %ecx # movl $125, %edx #, movl $.LC0, %eax #, call __might_sleep # call _cond_resched # testl %esi, %esi # work.461 jne .L19 #, jmp .L15 # .p2align 4,,15 .L10: popl %ebx # popl %esi # popl %edi # popl %ebp # ret .size task_work_run, .-task_work_run .p2align 4,,15 .globl task_work_cancel .type task_work_cancel, @function task_work_cancel: pushl %ebp # movl %esp, %ebp #, pushl %edi # pushl %esi # pushl %ebx # subl $4, %esp #, call mcount movl %edx, %edi # func, func leal 904(%eax), %esi #, pprev addl $960, %eax #, movl %eax, -16(%ebp) #, %sfp call _raw_spin_lock_irqsave # movl %eax, %edx #, flags jmp .L28 # .p2align 4,,15 .L29: movl %ebx, %esi # work, pprev .L28: movl (%esi), %ebx #* pprev, work testl %ebx, %ebx # work je .L23 #, cmpl %edi, 4(%ebx) # func, .func jne .L29 #, movl (%ebx), %ecx # .next, __new movl %ebx, %eax # work, __ret #APP # 69 "/c/wfg/tip/kernel/task_work.c" 1 cmpxchgl %ecx,(%esi) # __new,* pprev # 0 "" 2 #NO_APP cmpl %eax, %ebx # __ret, work jne .L28 #, .p2align 4,,15 .L23: movl -16(%ebp), %eax # %sfp, call _raw_spin_unlock_irqrestore # movl %ebx, %eax # work, popl %edx # popl %ebx # popl %esi # popl %edi # popl %ebp # ret .size task_work_cancel, .-task_work_cancel .p2align 4,,15 .globl task_work_add .type task_work_add, @function task_work_add: pushl %ebp # movl %esp, %ebp #, pushl %edi # pushl %esi # pushl %ebx # subl $12, %esp #, call mcount movl %eax, -20(%ebp) # task, %sfp movl %edx, -16(%ebp) # work, %sfp movb %cl, -21(%ebp) # notify, %sfp movl %eax, %edi # task, D.18562 addl $904, %edi #, D.18562 .p2align 4,,15 .L33: movl (%edi), %esi #* D.18562, head cmpl $work_exited, %esi #, head sete %al #, tmp72 xorl %ebx, %ebx # D.18565 movb %al, %bl # tmp72, D.18565 xorl %ecx, %ecx # movl %ebx, %edx # D.18565, movl $______f.18543, %eax #, call ftrace_likely_update # testl %ebx, %ebx # D.18565 jne .L38 #, movl -16(%ebp), %eax # %sfp, movl %esi, (%eax) # head, .next movl %esi, %eax # head, __ret movl -16(%ebp), %edx # %sfp, #APP # 34 "/c/wfg/tip/kernel/task_work.c" 1 cmpxchgl %edx,(%edi) #,* D.18562 # 0 "" 2 #NO_APP cmpl %eax, %esi # __ret, head jne .L33 #, cmpb $0, -21(%ebp) # %sfp je .L37 #, movl -20(%ebp), %edx # %sfp, movl 4(%edx), %eax # .stack, .stack #APP # 208 "/c/wfg/tip/arch/x86/include/asm/bitops.h" 1 bts $1, 8(%eax); setc %dl #,, c # 0 "" 2 #NO_APP .L37: xorl %eax, %eax # D.18573 addl $12, %esp #, popl %ebx # popl %esi # popl %edi # popl %ebp # ret .p2align 4,,15 .L38: movl $-3, %eax #, D.18573 addl $12, %esp #, popl %ebx # popl %esi # popl %edi # popl %ebp # ret .size task_work_add, .-task_work_add .section _ftrace_annotated_branch,"aw",@progbits .align 4 .type ______f.18543, @object .size ______f.18543, 20 ______f.18543: # func: .long __func__.18544 # file: .long .LC0 # line: .long 31 .zero 8 .local work_exited .comm work_exited,8,4 .section .rodata .type __func__.18544, @object .size __func__.18544, 14 __func__.18544: .string "task_work_add" .ident "GCC: (Debian 4.4.7-4) 4.4.7" .section .note.GNU-stack,"",@progbits --cNdxnHkX5QqsyA0e-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/