Buildresult: linus/s390-allnoconfig/s390x-gcc4.6 built on Jan 29 2019, 06:05
kisskb
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Status:
OK
Date/Time:
Jan 29 2019, 06:05
Duration:
0:00:11.852385
Builder:
ka1
Revision:
Revert "mm, memory_hotplug: initialize struct pages for the full memory section" (
4aa9fc2a435abe95a1e8d7f8c7b3d6356514b37a)
Target:
linus/s390-allnoconfig/s390x-gcc4.6
Branch:
linus
Compiler:
s390x-gcc4.6
(s390x-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:
allnoconfig
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Log:
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Possible warnings (3)
kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] arch/s390/mm/pgtable.c:413:15: warning: 'pmd_alloc_map' defined but not used [-Wunused-function] arch/s390/kernel/machine_kexec.c:145:22: warning: 'do_start_kdump' defined but not used [-Wunused-function]
Full Log
# git rev-parse -q --verify 4aa9fc2a435abe95a1e8d7f8c7b3d6356514b37a^{commit} 4aa9fc2a435abe95a1e8d7f8c7b3d6356514b37a already have revision, skipping fetch # git checkout -q -f -B kisskb 4aa9fc2a435abe95a1e8d7f8c7b3d6356514b37a # git clean -qxdf # < git log -1 # commit 4aa9fc2a435abe95a1e8d7f8c7b3d6356514b37a # Author: Michal Hocko <mhocko@suse.com> # Date: Fri Jan 25 19:08:58 2019 +0100 # # Revert "mm, memory_hotplug: initialize struct pages for the full memory section" # # This reverts commit 2830bf6f05fb3e05bc4743274b806c821807a684. # # The underlying assumption that one sparse section belongs into a single # numa node doesn't hold really. Robert Shteynfeld has reported a boot # failure. The boot log was not captured but his memory layout is as # follows: # # Early memory node ranges # node 1: [mem 0x0000000000001000-0x0000000000090fff] # node 1: [mem 0x0000000000100000-0x00000000dbdf8fff] # node 1: [mem 0x0000000100000000-0x0000001423ffffff] # node 0: [mem 0x0000001424000000-0x0000002023ffffff] # # This means that node0 starts in the middle of a memory section which is # also in node1. memmap_init_zone tries to initialize padding of a # section even when it is outside of the given pfn range because there are # code paths (e.g. memory hotplug) which assume that the full worth of # memory section is always initialized. # # In this particular case, though, such a range is already intialized and # most likely already managed by the page allocator. Scribbling over # those pages corrupts the internal state and likely blows up when any of # those pages gets used. # # Reported-by: Robert Shteynfeld <robert.shteynfeld@gmail.com> # Fixes: 2830bf6f05fb ("mm, memory_hotplug: initialize struct pages for the full memory section") # Cc: stable@kernel.org # Signed-off-by: Michal Hocko <mhocko@suse.com> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-ld --version # < git log --format=%s --max-count=1 4aa9fc2a435abe95a1e8d7f8c7b3d6356514b37a # < make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-allnoconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux- allnoconfig # make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-allnoconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/s390/mm/pgtable.c:413:15: warning: 'pmd_alloc_map' defined but not used [-Wunused-function] /kisskb/src/arch/s390/kernel/machine_kexec.c:145:22: warning: 'do_start_kdump' defined but not used [-Wunused-function] Completed OK # rm -rf /kisskb/build/linus_s390-allnoconfig_s390x # Build took: 0:00:11.852385
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