Buildresult: linus/sparc64-defconfig/sparc64-gcc11 built on Sep 3 2023, 02:28

kisskb

Revisions | Branches | Compilers | Configs | Build Results | Build Failures |

Status:	OK
Date/Time:	Sep 3 2023, 02:28
Duration:	0:00:54.811787
Builder:	ka4
Revision:	mm/pagewalk: fix bootstopping regression from extra pte_unmap() (`ee40d543e97d23d3392d8fb1ec9972eb4e9c7611)`
Target:	linus/sparc64-defconfig/sparc64-gcc11
Branch:	linus
Compiler:	sparc64-gcc11 (sparc64-linux-gcc (GCC) 11.3.0 / GNU ld (GNU Binutils) 2.38)
Config:	defconfig (download)
Log:	Download original Possible warnings (2) <stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp] WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned. Full Log # git rev-parse -q --verify ee40d543e97d23d3392d8fb1ec9972eb4e9c7611^{commit} ee40d543e97d23d3392d8fb1ec9972eb4e9c7611 already have revision, skipping fetch # git checkout -q -f -B kisskb ee40d543e97d23d3392d8fb1ec9972eb4e9c7611 # git clean -qxdf # < git log -1 # commit ee40d543e97d23d3392d8fb1ec9972eb4e9c7611 # Author: Hugh Dickins <hughd@google.com> # Date: Sat Sep 2 08:29:30 2023 -0700 # # mm/pagewalk: fix bootstopping regression from extra pte_unmap() # # Mikhail reports early-6.6-based Fedora Rawhide not booting: "rcu_preempt # detected expedited stalls", minutes wait, and then hung_task splat while # kworker trying to synchronize_rcu_expedited(). Nothing logged to disk. # # He bisected to my 6.6 a349d72fd9ef ("mm/pgtable: add rcu_read_lock() and # rcu_read_unlock()s"): but the one to blame is my 6.5 commit to fix the # espfix "bad pmd" warnings when booting x86_64 with CONFIG_EFI_PGT_DUMP=y. # # Gaah, that added an "addr >= TASK_SIZE" check to avoid pte_offset_map(), # but failed to add the equivalent check when choosing to pte_unmap(). # # It's not a problem on 6.5 (for different reasons, it's harmless on both # 64-bit and 32-bit), but becomes a bootstopper on 6.6 with the unbalanced # rcu_read_unlock() - RCU has a WARN_ON_ONCE for that, but it would have # scrolled off Mikhail's console too quickly. # # Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> # Closes: https://lore.kernel.org/linux-mm/CABXGCsNi8Tiv5zUPNXr6UJw6qV1VdaBEfGqEAMkkXE3QPvZuAQ@mail.gmail.com/ # Fixes: 8b1cb4a2e819 ("mm/pagewalk: fix EFI_PGT_DUMP of espfix area") # Fixes: a349d72fd9ef ("mm/pgtable: add rcu_read_lock() and rcu_read_unlock()s") # Signed-off-by: Hugh Dickins <hughd@google.com> # Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sparc64-linux/bin/sparc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version # < git log --format=%s --max-count=1 ee40d543e97d23d3392d8fb1ec9972eb4e9c7611 # make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_defconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sparc64-linux/bin/sparc64-linux- defconfig # < make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_defconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sparc64-linux/bin/sparc64-linux- help # make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_defconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sparc64-linux/bin/sparc64-linux- olddefconfig # make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_defconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sparc64-linux/bin/sparc64-linux- <stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp] WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned. Is "_mcount" prototyped in <asm/asm-prototypes.h>? kernel: arch/sparc/boot/image is ready kernel: arch/sparc/boot/zImage is ready Completed OK # rm -rf /kisskb/build/linus_defconfig_sparc64-gcc11 # Build took: 0:00:54.811787

© Michael Ellerman 2006-2018.