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. 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 <[email protected]> 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 <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Ingo Molnar <[email protected]> :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 [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
