Buildresult: powerpc-next/ia64-defconfig/ia64-gcc4.9 built on Mar 18 2020, 03:55

kisskb

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Status:	OK
Date/Time:	Mar 18 2020, 03:55
Duration:	0:02:13.911322
Builder:	ka3
Revision:	powerpc/hash64/devmap: Use H_PAGE_THP_HUGE when setting up huge devmap PTE entries (`ba25b5ebe96a63940a12d9f8d73edebfcaad470c)`
Target:	powerpc-next/ia64-defconfig/ia64-gcc4.9
Branch:	powerpc-next
Compiler:	ia64-gcc4.9 (ia64-linux-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	defconfig (download)
Log:	Download original Possible warnings (5) <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value] arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value] drivers/gpu/drm/drm_dp_mst_topology.c:5400:9: warning: missing braces around initializer [-Wmissing-braces] drivers/gpu/drm/drm_dp_mst_topology.c:5400:9: warning: (near initialization for 'desc.ident') [-Wmissing-braces] Full Log # git rev-parse -q --verify ba25b5ebe96a63940a12d9f8d73edebfcaad470c^{commit} ba25b5ebe96a63940a12d9f8d73edebfcaad470c already have revision, skipping fetch # git checkout -q -f -B kisskb ba25b5ebe96a63940a12d9f8d73edebfcaad470c # git clean -qxdf # < git log -1 # commit ba25b5ebe96a63940a12d9f8d73edebfcaad470c # Author: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> # Date: Fri Mar 13 15:18:42 2020 +0530 # # powerpc/hash64/devmap: Use H_PAGE_THP_HUGE when setting up huge devmap PTE entries # # H_PAGE_THP_HUGE is used to differentiate between a THP hugepage and # hugetlb hugepage entries. The difference is WRT how we handle hash # fault on these address. THP address enables MPSS in segments. We want # to manage devmap hugepage entries similar to THP pt entries. Hence use # H_PAGE_THP_HUGE for devmap huge PTE entries. # # With current code while handling hash PTE fault, we do set is_thp = # true when finding devmap PTE huge PTE entries. # # Current code also does the below sequence we setting up huge devmap # entries. # # entry = pmd_mkhuge(pfn_t_pmd(pfn, prot)); # if (pfn_t_devmap(pfn)) # entry = pmd_mkdevmap(entry); # # In that case we would find both H_PAGE_THP_HUGE and PAGE_DEVMAP set # for huge devmap PTE entries. This results in false positive error like # below. # # kernel BUG at /home/kvaneesh/src/linux/mm/memory.c:4321! # Oops: Exception in kernel mode, sig: 5 [#1] # LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries # Modules linked in: # CPU: 56 PID: 67996 Comm: t_mmap_dio Not tainted 5.6.0-rc4-59640-g371c804dedbc #128 # .... # NIP [c00000000044c9e4] __follow_pte_pmd+0x264/0x900 # LR [c0000000005d45f8] dax_writeback_one+0x1a8/0x740 # Call Trace: # str_spec.74809+0x22ffb4/0x2d116c (unreliable) # dax_writeback_one+0x1a8/0x740 # dax_writeback_mapping_range+0x26c/0x700 # ext4_dax_writepages+0x150/0x5a0 # do_writepages+0x68/0x180 # __filemap_fdatawrite_range+0x138/0x180 # file_write_and_wait_range+0xa4/0x110 # ext4_sync_file+0x370/0x6e0 # vfs_fsync_range+0x70/0xf0 # sys_msync+0x220/0x2e0 # system_call+0x5c/0x68 # # This is because our pmd_trans_huge check doesn't exclude _PAGE_DEVMAP. # # To make this all consistent, update pmd_mkdevmap to set # H_PAGE_THP_HUGE and pmd_trans_huge check now excludes _PAGE_DEVMAP # correctly. # # Fixes: ebd31197931d ("powerpc/mm: Add devmap support for ppc64") # Cc: stable@vger.kernel.org # v4.13+ # Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20200313094842.351830-1-aneesh.kumar@linux.ibm.com # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-ld --version # < git log --format=%s --max-count=1 ba25b5ebe96a63940a12d9f8d73edebfcaad470c # < make -s -j 80 ARCH=ia64 O=/kisskb/build/powerpc-next_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux- defconfig # < make -s -j 80 ARCH=ia64 O=/kisskb/build/powerpc-next_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux- help # make -s -j 80 ARCH=ia64 O=/kisskb/build/powerpc-next_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux- olddefconfig # make -s -j 80 ARCH=ia64 O=/kisskb/build/powerpc-next_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux- <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] In file included from /kisskb/src/arch/ia64/include/uapi/asm/intrinsics.h:22:0, from /kisskb/src/arch/ia64/include/asm/intrinsics.h:11, from /kisskb/src/arch/ia64/include/asm/bitops.h:19, from /kisskb/src/include/linux/bitops.h:29, from /kisskb/src/include/linux/kernel.h:12, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/preempt.h:11, from /kisskb/src/include/linux/spinlock.h:51, from /kisskb/src/include/linux/seqlock.h:36, from /kisskb/src/include/linux/time.h:6, from /kisskb/src/fs/nfs/read.c:11: /kisskb/src/fs/nfs/read.c: In function 'nfs_read_completion': /kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value] ((__typeof__((ptr))) __xchg((unsigned long) (x), (ptr), sizeof((ptr)))) ^ /kisskb/src/fs/nfs/read.c:196:5: note: in expansion of macro 'xchg' xchg(&nfs_req_openctx(req)->error, error); ^ /kisskb/src/fs/nfs/read.c: In function 'nfs_readpage': /kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value] ((__typeof__((ptr))) __xchg((unsigned long) (x), (ptr), sizeof((ptr)))) ^ /kisskb/src/fs/nfs/read.c:353:2: note: in expansion of macro 'xchg' xchg(&ctx->error, 0); ^ /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c: In function 'drm_dp_mst_dsc_aux_for_port': /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:5400:9: warning: missing braces around initializer [-Wmissing-braces] struct drm_dp_desc desc = { 0 }; ^ /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:5400:9: warning: (near initialization for 'desc.ident') [-Wmissing-braces] No errors detected in 21897 functions. Completed OK # rm -rf /kisskb/build/powerpc-next_ia64-defconfig_ia64-gcc4.9 # Build took: 0:02:13.911322

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