# 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 # 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 # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20191216103058.4958-1-david@redhat.com # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 892db32b07b340b60492e8e543aedc039639eef1 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/include/linux/kernel.h:11:0, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/module.h:12, from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) ^ /kisskb/src/include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: note: in expansion of macro 'IS_ERR_VALUE' if (IS_ERR_VALUE(fep->ring_mem_addr)) ^ /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc8e5bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc7ddb8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6138254 Bytes = 5994.39 KiB = 5.85 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168566 Bytes = 6023.99 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168530 Bytes = 6023.96 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6172568 Bytes = 6027.90 KiB = 5.89 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168566 Bytes = 6023.99 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6171261 Bytes = 6026.62 KiB = 5.89 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168534 Bytes = 6023.96 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168548 Bytes = 6023.97 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168247 Bytes = 6023.68 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6172538 Bytes = 6027.87 KiB = 5.89 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168246 Bytes = 6023.68 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:02 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6172423 Bytes = 6027.76 KiB = 5.89 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:03 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168237 Bytes = 6023.67 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:03 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168671 Bytes = 6024.09 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:03 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168683 Bytes = 6024.10 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.5.0-rc1-g892db32b07b3 Created: Mon Dec 16 23:29:03 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6168548 Bytes = 6023.97 KiB = 5.88 MiB Load Address: 00d00000 Entry Point: 00d002a4 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc-gcc5 # Build took: 0:02:11.777710