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Message-ID: <20131006073638.GA20710@localhost> Date: Sun, 6 Oct 2013 15:36:38 +0800 From: Fengguang Wu <fengguang.wu@...el.com> To: Mike Galbraith <bitbucket@...ine.de> Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org Subject: Re: [x86] BUG: unable to handle kernel paging request at 08000060 Hi Mike, On Sun, Oct 06, 2013 at 09:27:41AM +0200, Mike Galbraith wrote: > On Sun, 2013-10-06 at 07:47 +0800, Fengguang Wu wrote: > > Hi Peter, > > > > Here is another bisect on a different kconfig. > > No explosions here, it gives my compiler a terminal tummy ache. Thanks for looking into this! My gcc is wfg@bee /lkp% gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.8.1-3' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --with-arch-32=i586 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.8.1 (Debian 4.8.1-3) Thanks, Fengguang > marge:/usr/local/src/kernel/linux-3.x-tip # make net/sunrpc/xprtsock.o > make[1]: Nothing to be done for `all'. > make[1]: Nothing to be done for `relocs'. > CHK include/config/kernel.release > CHK include/generated/uapi/linux/version.h > CHK include/generated/utsrelease.h > CC arch/x86/kernel/asm-offsets.s > GEN include/generated/asm-offsets.h > CALL scripts/checksyscalls.sh > <stdin>:1220:2: warning: #warning syscall kcmp not implemented [-Wcpp] > <stdin>:1223:2: warning: #warning syscall finit_module not implemented [-Wcpp] > CC [M] net/sunrpc/xprtsock.o > net/sunrpc/xprtsock.c: In function ‘xs_setup_tcp’: > net/sunrpc/xprtsock.c:2844:1: internal compiler error: in advance_target_bb, at sched-rgn.c:3486 > Please submit a full bug report, > with preprocessed source if appropriate. > See <http://bugs.opensuse.org/> for instructions. > make[1]: *** [net/sunrpc/xprtsock.o] Error 1 > make: *** [net/sunrpc/xprtsock.o] Error 2 > > marge:/usr/local/src/kernel/linux-3.x-tip # gcc -v > Using built-in specs. > COLLECT_GCC=gcc > COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/4.6/lto-wrapper > Target: x86_64-suse-linux > Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.6 --enable-ssp --disable-libssp --disable-plugin --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-version-specific-runtime-libs --program-suffix=-4.6 --enable-linux-futex --without-system-libunwind --with-arch-32=i586 --with-tune=generic --build=x86_64-suse-linux > Thread model: posix > gcc version 4.6.2 (SUSE Linux) > > marge:/usr/local/src/kernel/linux-3.x-tip # git bisect good > 0c44c2d0f459cd7e275242b72f500137c4fa834d is the first bad commit > commit 0c44c2d0f459cd7e275242b72f500137c4fa834d > Author: Peter Zijlstra <peterz@...radead.org> > Date: Wed Sep 11 15:19:24 2013 +0200 > > x86: Use asm goto to implement better modify_and_test() functions > > Linus suggested using asm goto to get rid of the typical SETcc + TEST > instruction pair -- which also clobbers an extra register -- for our > typical modify_and_test() functions. > > Because asm goto doesn't allow output fields it has to include an > unconditinal memory clobber when it changes a memory variable to force > a reload. > > Luckily all atomic ops already imply a compiler barrier to go along > with their memory barrier semantics. > > Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org> > Signed-off-by: Peter Zijlstra <peterz@...radead.org> > Link: http://lkml.kernel.org/n/tip-0mtn9siwbeo1d33bap1422se@git.kernel.org > Signed-off-by: Ingo Molnar <mingo@...nel.org> > > :040000 040000 512c7965864218ef5a40569f80dd617fc75b60f9 22c5286cc1aa1e336c8b0d7efba08f3f3eff0640 M arch > > git bisect start > # good: [1da177e4c3f41524e886b7f1b8a0c1fc7321cac2] Linux-2.6.12-rc2 > git bisect good 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 > # bad: [5e08c0bc7c26ef5cd1626cf3d56c428d6aa61679] Merge branch 'x86/urgent' > git bisect bad 5e08c0bc7c26ef5cd1626cf3d56c428d6aa61679 > # good: [b9f399594d12e353dcb609c25219bdaa76c2a050] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 > git bisect good b9f399594d12e353dcb609c25219bdaa76c2a050 > # good: [be3eed2e96340d3c7a4d1ea1d63e7bd6095d1e34] netfilter: nf_ct_h323: fix usage of MODULE_ALIAS_NFCT_HELPER > git bisect good be3eed2e96340d3c7a4d1ea1d63e7bd6095d1e34 > # good: [ecd9883724b78cc72ed92c98bcb1a46c764fff21] ipv6: fix race condition regarding dst->expires and dst->from. > git bisect good ecd9883724b78cc72ed92c98bcb1a46c764fff21 > # good: [359d786b0402bac88d5bd6ad5a02c2a773f1b9f9] Merge tag 'at91-cleanup' of git://github.com/at91linux/linux-at91 into next/cleanup > git bisect good 359d786b0402bac88d5bd6ad5a02c2a773f1b9f9 > # good: [97473630c78e687deb59284b19d09a095d38bc36] Merge remote-tracking branch 'asoc/topic/mxs' into asoc-next > git bisect good 97473630c78e687deb59284b19d09a095d38bc36 > # good: [cc998ff8811530be521f6b316f37ab7676a07938] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next > git bisect good cc998ff8811530be521f6b316f37ab7676a07938 > # good: [b0dd663b60944a3ce86430fa35549fb37968bda0] netpoll: Should handle ETH_P_ARP other than ETH_P_IP in netpoll_neigh_reply > git bisect good b0dd663b60944a3ce86430fa35549fb37968bda0 > # good: [c31eeaced22ce8bd61268a3c595d542bb38c0a4f] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net > git bisect good c31eeaced22ce8bd61268a3c595d542bb38c0a4f > # good: [9c295bdf93935584839e8b1de23e97898a6b76a0] kvm tools: Add kvm__trigger_irq() > git bisect good 9c295bdf93935584839e8b1de23e97898a6b76a0 > # good: [efee6ad6b0aa0899ccad0f379b83ce9c3287dad5] kvm tools: use bitwise 'and' in kvm-ipc > git bisect good efee6ad6b0aa0899ccad0f379b83ce9c3287dad5 > # good: [305c6f0770c0420f2c618778517647649c813d23] kvm tools: arm: consolidate CPU node generation > git bisect good 305c6f0770c0420f2c618778517647649c813d23 > # bad: [d229a4718e80e8ba0fed36a2702af343ddc71b6c] Merge branch 'x86/uv' > git bisect bad d229a4718e80e8ba0fed36a2702af343ddc71b6c > # bad: [67208898949a3647597f64788147a013906552ef] Merge branch 'timers/core' > git bisect bad 67208898949a3647597f64788147a013906552ef > # bad: [75f93fed50c2abadbab6ef546b265f51ca975b27] sched: Revert need_resched() to look at TIF_NEED_RESCHED > git bisect bad 75f93fed50c2abadbab6ef546b265f51ca975b27 > # bad: [0c44c2d0f459cd7e275242b72f500137c4fa834d] x86: Use asm goto to implement better modify_and_test() functions > git bisect bad 0c44c2d0f459cd7e275242b72f500137c4fa834d > # good: [40a0c68ca9b49fb3e7292c1bae035ba5bcb27903] Merge branch 'sched/urgent' into sched/core > git bisect good 40a0c68ca9b49fb3e7292c1bae035ba5bcb27903 > # good: [9bd721c55c8a886b938a45198aab0ccb52f1f7fa] sched/balancing: Consider max cost of idle balance per sched domain > git bisect good 9bd721c55c8a886b938a45198aab0ccb52f1f7fa > # good: [4314895165623879937f46d767673654662b570c] sched: Micro-optimize by dropping unnecessary task_rq() calls > git bisect good 4314895165623879937f46d767673654662b570c > # first bad commit: [0c44c2d0f459cd7e275242b72f500137c4fa834d] x86: Use asm goto to implement better modify_and_test() functions > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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