Buildresult: powerpc-next/parisc-defconfig/parisc-gcc8 built on Aug 3 2018, 16:43
kisskb
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Status:
OK
Date/Time:
Aug 3 2018, 16:43
Duration:
0:01:03.638391
Builder:
ka2
Revision:
powerpc/powernv: Fix concurrency issue with npu->mmio_atsd_usage (
a6fcdbf95d7907bc5d5a669adb86e6bda72d738b)
Target:
powerpc-next/parisc-defconfig/parisc-gcc8
Branch:
powerpc-next
Compiler:
parisc-gcc8
(hppa-linux-gcc (GCC) 8.1.0)
Config:
defconfig
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Log:
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Possible warnings (8)
<stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp] fs/kernfs/symlink.c:91:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation] crypto/ablkcipher.c:374:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation] crypto/ablkcipher.c:448:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation] crypto/blkcipher.c:513:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation] fs/ext4/super.c:326:2: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation] fs/ext4/super.c:330:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation] lib/kobject.c:128:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
Full Log
# git rev-parse -q --verify a6fcdbf95d7907bc5d5a669adb86e6bda72d738b^{commit} a6fcdbf95d7907bc5d5a669adb86e6bda72d738b already have revision, skipping fetch # git checkout -q -f -B kisskb a6fcdbf95d7907bc5d5a669adb86e6bda72d738b # git clean -qxdf # < git log -1 # commit a6fcdbf95d7907bc5d5a669adb86e6bda72d738b # Author: Reza Arbab <arbab@linux.ibm.com> # Date: Thu Aug 2 23:03:36 2018 -0500 # # powerpc/powernv: Fix concurrency issue with npu->mmio_atsd_usage # # We've encountered a performance issue when multiple processors stress # {get,put}_mmio_atsd_reg(). These functions contend for # mmio_atsd_usage, an unsigned long used as a bitmask. # # The accesses to mmio_atsd_usage are done using test_and_set_bit_lock() # and clear_bit_unlock(). As implemented, both of these will require # a (successful) stwcx to that same cache line. # # What we end up with is thread A, attempting to unlock, being slowed by # other threads repeatedly attempting to lock. A's stwcx instructions # fail and retry because the memory reservation is lost every time a # different thread beats it to the punch. # # There may be a long-term way to fix this at a larger scale, but for # now resolve the immediate problem by gating our call to # test_and_set_bit_lock() with one to test_bit(), which is obviously # implemented without using a store. # # Fixes: 1ab66d1fbada ("powerpc/powernv: Introduce address translation services for Nvlink2") # Signed-off-by: Reza Arbab <arbab@linux.ibm.com> # Acked-by: Alistair Popple <alistair@popple.id.au> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/hppa-linux/bin/hppa-linux-gcc --version # < git log --format=%s --max-count=1 a6fcdbf95d7907bc5d5a669adb86e6bda72d738b # < make -s -j 48 ARCH=parisc O=/kisskb/build/powerpc-next_parisc-defconfig_parisc CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/hppa-linux/bin/hppa-linux- defconfig # make -s -j 48 ARCH=parisc O=/kisskb/build/powerpc-next_parisc-defconfig_parisc CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/hppa-linux/bin/hppa-linux- /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. <stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp] /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. In function 'kernfs_get_target_path', inlined from 'kernfs_getlink.isra.0' at /kisskb/src/fs/kernfs/symlink.c:109:10, inlined from 'kernfs_iop_get_link.part.1' at /kisskb/src/fs/kernfs/symlink.c:127:10, inlined from 'kernfs_iop_get_link': /kisskb/src/fs/kernfs/symlink.c:91:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation] strncpy(s + len, kn->name, slen); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/fs/kernfs/symlink.c: In function 'kernfs_iop_get_link': /kisskb/src/fs/kernfs/symlink.c:88:14: note: length computed here int slen = strlen(kn->name); ^~~~~~~~~~~~~~~~ /kisskb/src/crypto/ablkcipher.c: In function 'crypto_ablkcipher_report': /kisskb/src/crypto/ablkcipher.c:374:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation] strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<default>", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sizeof(rblkcipher.geniv)); ~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/crypto/ablkcipher.c: In function 'crypto_givcipher_report': /kisskb/src/crypto/ablkcipher.c:448:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation] strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<built-in>", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sizeof(rblkcipher.geniv)); ~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/crypto/blkcipher.c: In function 'crypto_blkcipher_report': /kisskb/src/crypto/blkcipher.c:513:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation] strncpy(rblkcipher.geniv, alg->cra_blkcipher.geniv ?: "<default>", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sizeof(rblkcipher.geniv)); ~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/fs/ext4/super.c: In function '__save_error_info.isra.5': /kisskb/src/fs/ext4/super.c:326:2: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation] strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/fs/ext4/super.c:330:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation] strncpy(es->s_first_error_func, func, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sizeof(es->s_first_error_func)); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'fill_kobj_path', inlined from 'kobject_get_path' at /kisskb/src/lib/kobject.c:155:2: /kisskb/src/lib/kobject.c:128:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation] strncpy(path + length, kobject_name(parent), cur); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/lib/kobject.c: In function 'kobject_get_path': /kisskb/src/lib/kobject.c:125:13: note: length computed here int cur = strlen(kobject_name(parent)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ Completed OK # rm -rf /kisskb/build/powerpc-next_parisc-defconfig_parisc # Build took: 0:01:03.638391
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