# git rev-parse -q --verify b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40^{commit} b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40 already have revision, skipping fetch # git checkout -q -f -B kisskb b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40 # git clean -qxdf # < git log -1 # commit b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40 # Author: Nathan Fontenot # Date: Tue Oct 2 10:35:59 2018 -0500 # # powerpc/pseries: Track LMB nid instead of using device tree # # When removing memory we need to remove the memory from the node # it was added to instead of looking up the node it should be in # in the device tree. # # During testing we have seen scenarios where the affinity for a # LMB changes due to a partition migration or PRRN event. In these # cases the node the LMB exists in may not match the node the device # tree indicates it belongs in. This can lead to a system crash # when trying to DLPAR remove the LMB after a migration or PRRN # event. The current code looks up the node in the device tree to # remove the LMB from, the crash occurs when we try to offline this # node and it does not have any data, i.e. node_data[nid] == NULL. # # 36:mon> e # cpu 0x36: Vector: 300 (Data Access) at [c0000001828b7810] # pc: c00000000036d08c: try_offline_node+0x2c/0x1b0 # lr: c0000000003a14ec: remove_memory+0xbc/0x110 # sp: c0000001828b7a90 # msr: 800000000280b033 # dar: 9a28 # dsisr: 40000000 # current = 0xc0000006329c4c80 # paca = 0xc000000007a55200 softe: 0 irq_happened: 0x01 # pid = 76926, comm = kworker/u320:3 # # 36:mon> t # [link register ] c0000000003a14ec remove_memory+0xbc/0x110 # [c0000001828b7a90] c00000000006a1cc arch_remove_memory+0x9c/0xd0 (unreliable) # [c0000001828b7ad0] c0000000003a14e0 remove_memory+0xb0/0x110 # [c0000001828b7b20] c0000000000c7db4 dlpar_remove_lmb+0x94/0x160 # [c0000001828b7b60] c0000000000c8ef8 dlpar_memory+0x7e8/0xd10 # [c0000001828b7bf0] c0000000000bf828 handle_dlpar_errorlog+0xf8/0x160 # [c0000001828b7c60] c0000000000bf8cc pseries_hp_work_fn+0x3c/0xa0 # [c0000001828b7c90] c000000000128cd8 process_one_work+0x298/0x5a0 # [c0000001828b7d20] c000000000129068 worker_thread+0x88/0x620 # [c0000001828b7dc0] c00000000013223c kthread+0x1ac/0x1c0 # [c0000001828b7e30] c00000000000b45c ret_from_kernel_thread+0x5c/0x80 # # To resolve this we need to track the node a LMB belongs to when # it is added to the system so we can remove it from that node instead # of the node that the device tree indicates it should belong to. # # Signed-off-by: Nathan Fontenot # Signed-off-by: Michael Ellerman # < /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 b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- randconfig KCONFIG_SEED=0xB0D29862 # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_BUILD_DOCSRC=n # Added to kconfig CONFIG_MODULE_SIG=n # Added to kconfig CONFIG_CPU_BIG_ENDIAN=y # Added to kconfig CONFIG_PPC64=y # Added to kconfig CONFIG_PPC_DISABLE_WERROR=y # Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=y # Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y # Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n # Added to kconfig CONFIG_GCC_PLUGINS=n # Added to kconfig CONFIG_LD_HEAD_STUB_CATCH=y # Added to kconfig # yes \n | make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- oldconfig yes: standard output: Broken pipe # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- :1478:2: warning: #warning syscall pidfd_send_signal not implemented [-Wcpp] :1481:2: warning: #warning syscall io_uring_setup not implemented [-Wcpp] :1484:2: warning: #warning syscall io_uring_enter not implemented [-Wcpp] :1487:2: warning: #warning syscall io_uring_register not implemented [-Wcpp] cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:187:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/printk/printk.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /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:337:21: note: 'pdeo' was declared here /kisskb/src/fs/proc/inode.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl': /kisskb/src/lib/mpi/mpicoder.c:352:8: warning: 'buff' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/mpi/mpicoder.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/kernel/futex.c: In function 'futex_atomic_op_inuser': /kisskb/src/kernel/futex.c:1668:3: warning: 'oldval' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/futex.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/i2c/i2c-core-base.c: In function 'i2c_generic_scl_recovery': /kisskb/src/drivers/i2c/i2c-core-base.c:235:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/i2c/i2c-core-base.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/input/mouse/cyapa_gen3.c: In function 'cyapa_gen3_set_power_mode': /kisskb/src/drivers/input/mouse/cyapa_gen3.c:927:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/input/mouse/cyapa_gen3.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/input/mouse/cyapa.c: In function 'cyapa_irq': /kisskb/src/drivers/input/mouse/cyapa.c:717:27: warning: 'error' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/input/mouse/cyapa.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/misc/cxl/native.c: In function 'native_irq_wait': /kisskb/src/drivers/misc/cxl/native.c:1248:2: warning: 'ph' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/misc/cxl/native.c:1248:2: warning: 'dsisr' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/mtd/ubi/eba.c: In function 'try_write_vid_and_data': /kisskb/src/drivers/mtd/ubi/eba.c:1001:7: warning: 'opnum' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/misc/cxl/native.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/mtd/ubi/eba.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/video/backlight/adp8860_bl.c: In function 'adp8860_bl_ambient_light_level_show': /kisskb/src/drivers/video/backlight/adp8860_bl.c:579:10: warning: 'ret_val' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/video/backlight/adp8860_bl.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/lib/rhashtable.c: In function 'rhashtable_rehash_one': /kisskb/src/lib/rhashtable.c:264:2: warning: 'next' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/gpu/drm/scheduler/sched_main.c: In function 'drm_sched_resubmit_jobs': /kisskb/src/drivers/gpu/drm/scheduler/sched_main.c:476:20: warning: 'guilty_context' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/scheduler/sched_main.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_connector_check': /kisskb/src/drivers/gpu/drm/drm_atomic.c:420:38: warning: 'crtc_state' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/drm_atomic.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function 'dm_determine_update_type_for_commit': /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:5860:10: warning: missing braces around initializer [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:5860:10: warning: (near initialization for 'stream_update.src') [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c: In function 'g94_i2c_aux_xfer': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c:160:31: warning: 'stat' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c: In function 'gm200_i2c_aux_xfer': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c:160:31: warning: 'stat' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c: In function 'generic_reg_wait': /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:244:11: warning: 'reg_val' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c: In function 'gk104_top_oneinit': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:104:1: warning: 'inst' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:104:1: warning: 'type' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c: At top level: cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized" [enabled by default] WARNING: vmlinux.o(.text+0x32ba): Section mismatch in reference from the variable start_here_multiplatform to the function .init.text:.early_setup() The function start_here_multiplatform() references the function __init .early_setup(). This is often because start_here_multiplatform lacks a __init annotation or the annotation of .early_setup is wrong. Completed OK # rm -rf /kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 # Build took: 0:04:09.006642