Buildresult: powerpc-fixes/tqm8xx_defconfig/powerpc-gcc4.6 built on Dec 16 2019, 23:22

kisskb

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Status:	OK
Date/Time:	Dec 16 2019, 23:22
Duration:	0:00:39.715438
Builder:	ka3
Revision:	powerpc/pseries/cmm: fix managed page counts when migrating pages between zones (`892db32b07b340b60492e8e543aedc039639eef1)`
Target:	powerpc-fixes/tqm8xx_defconfig/powerpc-gcc4.6
Branch:	powerpc-fixes
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	tqm8xx_defconfig (download)
Log:	Download original Possible warnings (2) include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 892db32b07b340b60492e8e543aedc039639eef1^{commit} 892db32b07b340b60492e8e543aedc039639eef1 already have revision, skipping fetch # git checkout -q -f -B kisskb 892db32b07b340b60492e8e543aedc039639eef1 # git clean -qxdf # < git log -1 # commit 892db32b07b340b60492e8e543aedc039639eef1 # Author: David Hildenbrand <david@redhat.com> # Date: Mon Dec 16 11:30:58 2019 +0100 # # powerpc/pseries/cmm: fix managed page counts when migrating pages between zones # # Commit 63341ab03706 (virtio-balloon: fix managed page counts when migrating # pages between zones) fixed a long existing BUG in the virtio-balloon # driver when pages would get migrated between zones. I did not try to # reproduce on powerpc, but looking at the code, the same should apply to # powerpc/cmm ever since it started using the balloon compaction # infrastructure (luckily just recently). # # In case we have to migrate a ballon page to a newpage of another zone, the # managed page count of both zones is wrong. Paired with memory offlining # (which will adjust the managed page count), we can trigger kernel crashes # and all kinds of different symptoms. # # Fix it by properly adjusting the managed page count when migrating if # the zone changed. # # We'll temporarily modify the totalram page count. If this ever becomes a # problem, we can fine tune by providing helpers that don't touch # the totalram pages (e.g., adjust_zone_managed_page_count()). # # Fixes: fe030c9b85e6 ("powerpc/pseries/cmm: Implement balloon compaction") # Signed-off-by: David Hildenbrand <david@redhat.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20191216103058.4958-1-david@redhat.com # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 892db32b07b340b60492e8e543aedc039639eef1 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_tqm8xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- tqm8xx_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_tqm8xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] Completed OK # rm -rf /kisskb/build/powerpc-fixes_tqm8xx_defconfig_powerpc-gcc4.6 # Build took: 0:00:39.715438

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