Buildresult: powerpc-next/pseries_defconfig+NO_MEMORY_HOTREMOVE/powerpc-gcc4.6 built on Jun 6 2018, 02:29

kisskb

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Status:	OK
Date/Time:	Jun 6 2018, 02:29
Duration:	0:02:10.277679
Builder:	ka1
Revision:	cpuidle: powernv: Fix promotion from snooze if next state disabled (`0a4ec6aa035a52c422eceb2ed51ed88392a3d6c2)`
Target:	powerpc-next/pseries_defconfig+NO_MEMORY_HOTREMOVE/powerpc-gcc4.6
Branch:	powerpc-next
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3)
Config:	pseries_defconfig+NO_MEMORY_HOTREMOVE (download)
Log:	Download original Possible warnings (12) kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] kernel/cgroup/cgroup-v1.c:1268:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] net/bridge/br_netlink.c:635:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] mm/swap_state.c:135:5: warning: 'error' may be used uninitialized in this function [-Wuninitialized] mm/hugetlb.c:1433:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] fs/nfsd/nfs4xdr.c:2041:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized] drivers/net/tun.c:1822:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] drivers/net/tun.c:1732:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 0a4ec6aa035a52c422eceb2ed51ed88392a3d6c2^{commit} 0a4ec6aa035a52c422eceb2ed51ed88392a3d6c2 already have revision, skipping fetch # git checkout -q -f -B kisskb 0a4ec6aa035a52c422eceb2ed51ed88392a3d6c2 # git clean -qxdf # < git log -1 # commit 0a4ec6aa035a52c422eceb2ed51ed88392a3d6c2 # Author: Gautham R. Shenoy <ego@linux.vnet.ibm.com> # Date: Thu May 31 17:45:09 2018 +0530 # # cpuidle: powernv: Fix promotion from snooze if next state disabled # # The commit 78eaa10f027c ("cpuidle: powernv/pseries: Auto-promotion of # snooze to deeper idle state") introduced a timeout for the snooze idle # state so that it could be eventually be promoted to a deeper idle # state. The snooze timeout value is static and set to the target # residency of the next idle state, which would train the cpuidle # governor to pick the next idle state eventually. # # The unfortunate side-effect of this is that if the next idle state(s) # is disabled, the CPU will forever remain in snooze, despite the fact # that the system is completely idle, and other deeper idle states are # available. # # This patch fixes the issue by dynamically setting the snooze timeout # to the target residency of the next enabled state on the device. # # Before Patch: # POWER8 : Only nap disabled. # $ cpupower monitor sleep 30 # sleep took 30.01297 seconds and exited with status 0 # \|Idle_Stats # PKG \|CORE\|CPU \| snoo \| Nap \| Fast # 0\| 8\| 0\| 96.41\| 0.00\| 0.00 # 0\| 8\| 1\| 96.43\| 0.00\| 0.00 # 0\| 8\| 2\| 96.47\| 0.00\| 0.00 # 0\| 8\| 3\| 96.35\| 0.00\| 0.00 # 0\| 8\| 4\| 96.37\| 0.00\| 0.00 # 0\| 8\| 5\| 96.37\| 0.00\| 0.00 # 0\| 8\| 6\| 96.47\| 0.00\| 0.00 # 0\| 8\| 7\| 96.47\| 0.00\| 0.00 # # POWER9: Shallow states (stop0lite, stop1lite, stop2lite, stop0, stop1, # stop2) disabled: # $ cpupower monitor sleep 30 # sleep took 30.05033 seconds and exited with status 0 # \|Idle_Stats # PKG \|CORE\|CPU \| snoo \| stop \| stop \| stop \| stop \| stop \| stop \| stop \| stop # 0\| 16\| 0\| 89.79\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00 # 0\| 16\| 1\| 90.12\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00 # 0\| 16\| 2\| 90.21\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00 # 0\| 16\| 3\| 90.29\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00 # # After Patch: # POWER8 : Only nap disabled. # $ cpupower monitor sleep 30 # sleep took 30.01200 seconds and exited with status 0 # \|Idle_Stats # PKG \|CORE\|CPU \| snoo \| Nap \| Fast # 0\| 8\| 0\| 16.58\| 0.00\| 77.21 # 0\| 8\| 1\| 18.42\| 0.00\| 75.38 # 0\| 8\| 2\| 4.70\| 0.00\| 94.09 # 0\| 8\| 3\| 17.06\| 0.00\| 81.73 # 0\| 8\| 4\| 3.06\| 0.00\| 95.73 # 0\| 8\| 5\| 7.00\| 0.00\| 96.80 # 0\| 8\| 6\| 1.00\| 0.00\| 98.79 # 0\| 8\| 7\| 5.62\| 0.00\| 94.17 # # POWER9: Shallow states (stop0lite, stop1lite, stop2lite, stop0, stop1, # stop2) disabled: # # $ cpupower monitor sleep 30 # sleep took 30.02110 seconds and exited with status 0 # \|Idle_Stats # PKG \|CORE\|CPU \| snoo \| stop \| stop \| stop \| stop \| stop \| stop \| stop \| stop # 0\| 0\| 0\| 0.69\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 9.39\| 89.70 # 0\| 0\| 1\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.05\| 93.21 # 0\| 0\| 2\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 89.93 # 0\| 0\| 3\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 0.00\| 93.26 # # Fixes: 78eaa10f027c ("cpuidle: powernv/pseries: Auto-promotion of snooze to deeper idle state") # Cc: stable@vger.kernel.org # v4.2+ # Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> # Reviewed-by: Balbir Singh <bsingharora@gmail.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 0a4ec6aa035a52c422eceb2ed51ed88392a3d6c2 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_defconfig+NO_MEMORY_HOTREMOVE_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- pseries_defconfig # Added to kconfig CONFIG_MEMORY_HOTPLUG=y # Added to kconfig CONFIG_MEMORY_HOTREMOVE=n # yes \n \| make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_defconfig+NO_MEMORY_HOTREMOVE_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- oldconfig yes: standard output: Broken pipe yes: write error # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_defconfig+NO_MEMORY_HOTREMOVE_powerpc 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:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount': /kisskb/src/kernel/cgroup/cgroup-v1.c:1268:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/bridge/br_netlink.c: In function 'br_afspec': /kisskb/src/net/bridge/br_netlink.c:635:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/swap_state.c: In function '__add_to_swap_cache': /kisskb/src/mm/swap_state.c:135:5: warning: 'error' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page': /kisskb/src/mm/hugetlb.c:1433:5: warning: 'page' 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:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:340:21: note: 'pdeo' was declared here /kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc': /kisskb/src/fs/nfsd/nfs4xdr.c:2041:9: warning: 'str' 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:1822:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1732:46: warning: 'linear' 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:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here Completed OK # rm -rf /kisskb/build/powerpc-next_pseries_defconfig+NO_MEMORY_HOTREMOVE_powerpc # Build took: 0:02:10.277679

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