Buildresult: powerpc-next/pseries_defconfig+NO_SPLPAR/powerpc-gcc4.6 built on Mar 18 2020, 03:01

kisskb

Revisions | Branches | Compilers | Configs | Build Results | Build Failures |

Status:	OK
Date/Time:	Mar 18 2020, 03:01
Duration:	0:02:35.014025
Builder:	ka1
Revision:	powerpc/hash64/devmap: Use H_PAGE_THP_HUGE when setting up huge devmap PTE entries (`ba25b5ebe96a63940a12d9f8d73edebfcaad470c)`
Target:	powerpc-next/pseries_defconfig+NO_SPLPAR/powerpc-gcc4.6
Branch:	powerpc-next
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	pseries_defconfig+NO_SPLPAR (download)
Log:	Download original Possible warnings (14) kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] kernel/trace/trace_events.c:2040:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] mm/hugetlb.c:1426:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized] drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] net/core/devlink.c:4619:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] drivers/net/tun.c:1836:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] drivers/net/tun.c:1749:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] net/bridge/br_netlink.c:571:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] fs/nfsd/nfs4xdr.c:2151:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized] fs/io_uring.c:5824:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] 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/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 ba25b5ebe96a63940a12d9f8d73edebfcaad470c # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_defconfig+NO_SPLPAR_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- pseries_defconfig # Added to kconfig CONFIG_PPC_SPLPAR=n # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_defconfig+NO_SPLPAR_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- help # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_defconfig+NO_SPLPAR_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- olddefconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_defconfig+NO_SPLPAR_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /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] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:72:12: 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/trace/trace_events.c: In function 'event_create_dir': /kisskb/src/kernel/trace/trace_events.c:2040:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:228:19: note: 'i' was declared here /kisskb/src/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec': /kisskb/src/fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page': /kisskb/src/mm/hugetlb.c:1426:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/usb/core/devio.c: In function 'async_completed': /kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/core/devlink.c: In function 'devlink_fmsg_prepare_skb': /kisskb/src/net/core/devlink.c:4619:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c: In function 'tun_get_user': /kisskb/src/drivers/net/tun.c:1836:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1749:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/bridge/br_netlink.c: In function 'br_process_vlan_info': /kisskb/src/net/bridge/br_netlink.c:571:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char': /kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc': /kisskb/src/fs/nfsd/nfs4xdr.c:2151:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/io_uring.c: In function '__io_sqe_files_update': /kisskb/src/fs/io_uring.c:5824:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] Completed OK # rm -rf /kisskb/build/powerpc-next_pseries_defconfig+NO_SPLPAR_powerpc-gcc4.6 # Build took: 0:02:35.014025

© Michael Ellerman 2006-2018.