Buildresult: powerpc-fixes/mips-defconfig/mipsel-gcc5 built on Jul 28 2020, 02:22

kisskb

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Status:	OK
Date/Time:	Jul 28 2020, 02:22
Duration:	0:02:02.397475
Builder:	ka1
Revision:	powerpc/64s/hash: Fix hash_preload running with interrupts enabled (`909adfc66b9a1db21b5e8733e9ebfa6cd5135d74)`
Target:	powerpc-fixes/mips-defconfig/mipsel-gcc5
Branch:	powerpc-fixes
Compiler:	mipsel-gcc5 (mipsel-linux-gcc.br_real (Buildroot 2016.11-git-00613-ge98b4dd) 5.4.0 / GNU ld (GNU Binutils) 2.26.1)
Config:	defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify 909adfc66b9a1db21b5e8733e9ebfa6cd5135d74^{commit} 909adfc66b9a1db21b5e8733e9ebfa6cd5135d74 already have revision, skipping fetch # git checkout -q -f -B kisskb 909adfc66b9a1db21b5e8733e9ebfa6cd5135d74 # git clean -qxdf # < git log -1 # commit 909adfc66b9a1db21b5e8733e9ebfa6cd5135d74 # Author: Nicholas Piggin <npiggin@gmail.com> # Date: Mon Jul 27 16:09:47 2020 +1000 # # powerpc/64s/hash: Fix hash_preload running with interrupts enabled # # Commit 2f92447f9f96 ("powerpc/book3s64/hash: Use the pte_t address from the # caller") removed the local_irq_disable from hash_preload, but it was # required for more than just the page table walk: the hash pte busy bit is # effectively a lock which may be taken in interrupt context, and the local # update flag test must not be preempted before it's used. # # This solves apparent lockups with perf interrupting __hash_page_64K. If # get_perf_callchain then also takes a hash fault on the same page while it # is already locked, it will loop forever taking hash faults, which looks like # this: # # cpu 0x49e: Vector: 100 (System Reset) at [c00000001a4f7d70] # pc: c000000000072dc8: hash_page_mm+0x8/0x800 # lr: c00000000000c5a4: do_hash_page+0x24/0x38 # sp: c0002ac1cc69ac70 # msr: 8000000000081033 # current = 0xc0002ac1cc602e00 # paca = 0xc00000001de1f280 irqmask: 0x03 irq_happened: 0x01 # pid = 20118, comm = pread2_processe # Linux version 5.8.0-rc6-00345-g1fad14f18bc6 # 49e:mon> t # [c0002ac1cc69ac70] c00000000000c5a4 do_hash_page+0x24/0x38 (unreliable) # --- Exception: 300 (Data Access) at c00000000008fa60 __copy_tofrom_user_power7+0x20c/0x7ac # [link register ] c000000000335d10 copy_from_user_nofault+0xf0/0x150 # [c0002ac1cc69af70] c00032bf9fa3c880 (unreliable) # [c0002ac1cc69afa0] c000000000109df0 read_user_stack_64+0x70/0xf0 # [c0002ac1cc69afd0] c000000000109fcc perf_callchain_user_64+0x15c/0x410 # [c0002ac1cc69b060] c000000000109c00 perf_callchain_user+0x20/0x40 # [c0002ac1cc69b080] c00000000031c6cc get_perf_callchain+0x25c/0x360 # [c0002ac1cc69b120] c000000000316b50 perf_callchain+0x70/0xa0 # [c0002ac1cc69b140] c000000000316ddc perf_prepare_sample+0x25c/0x790 # [c0002ac1cc69b1a0] c000000000317350 perf_event_output_forward+0x40/0xb0 # [c0002ac1cc69b220] c000000000306138 __perf_event_overflow+0x88/0x1a0 # [c0002ac1cc69b270] c00000000010cf70 record_and_restart+0x230/0x750 # [c0002ac1cc69b620] c00000000010d69c perf_event_interrupt+0x20c/0x510 # [c0002ac1cc69b730] c000000000027d9c performance_monitor_exception+0x4c/0x60 # [c0002ac1cc69b750] c00000000000b2f8 performance_monitor_common_virt+0x1b8/0x1c0 # --- Exception: f00 (Performance Monitor) at c0000000000cb5b0 pSeries_lpar_hpte_insert+0x0/0x160 # [link register ] c0000000000846f0 __hash_page_64K+0x210/0x540 # [c0002ac1cc69ba50] 0000000000000000 (unreliable) # [c0002ac1cc69bb00] c000000000073ae0 update_mmu_cache+0x390/0x3a0 # [c0002ac1cc69bb70] c00000000037f024 wp_page_copy+0x364/0xce0 # [c0002ac1cc69bc20] c00000000038272c do_wp_page+0xdc/0xa60 # [c0002ac1cc69bc70] c0000000003857bc handle_mm_fault+0xb9c/0x1b60 # [c0002ac1cc69bd50] c00000000006c434 __do_page_fault+0x314/0xc90 # [c0002ac1cc69be20] c00000000000c5c8 handle_page_fault+0x10/0x2c # --- Exception: 300 (Data Access) at 00007fff8c861fe8 # SP (7ffff6b19660) is in userspace # # Fixes: 2f92447f9f96 ("powerpc/book3s64/hash: Use the pte_t address from the caller") # Reported-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> # Reported-by: Anton Blanchard <anton@ozlabs.org> # Signed-off-by: Nicholas Piggin <npiggin@gmail.com> # Reviewed-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/20200727060947.10060-1-npiggin@gmail.com # < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version # < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-ld --version # < git log --format=%s --max-count=1 909adfc66b9a1db21b5e8733e9ebfa6cd5135d74 # < make -s -j 48 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux- defconfig # < make -s -j 48 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux- help # make -s -j 48 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux- olddefconfig # make -s -j 48 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux- FIT description: Linux 5.8.0-rc2-g909adfc66b9a Created: Tue Jul 28 02:24:45 2020 Image 0 (kernel@0) Description: Linux 5.8.0-rc2-g909adfc66b9a Created: Tue Jul 28 02:24:45 2020 Type: Kernel Image Compression: gzip compressed Data Size: 4993847 Bytes = 4876.80 KiB = 4.76 MiB Architecture: MIPS OS: Linux Load Address: 0x80100000 Entry Point: 0x809319e0 Hash algo: sha1 Hash value: 82bdf19b26485b5dfdb8778d05957345bfd63e59 Image 1 (fdt@boston) Description: img,boston Device Tree Created: Tue Jul 28 02:24:45 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 3793 Bytes = 3.70 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 4799f50d688573234da6e9d7701234d394759ef4 Image 2 (fdt@ni169445) Description: NI 169445 device tree Created: Tue Jul 28 02:24:45 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 1871 Bytes = 1.83 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 51b89b31605ee62038c8468c429af091dfc75ec7 Image 3 (fdt@ocelot_pcb123) Description: MSCC Ocelot PCB123 Device Tree Created: Tue Jul 28 02:24:45 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 4639 Bytes = 4.53 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: be2724f58b66c316a61da7c11ced633f4e7e86c7 Image 4 (fdt@ocelot_pcb120) Description: MSCC Ocelot PCB120 Device Tree Created: Tue Jul 28 02:24:45 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 5198 Bytes = 5.08 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 7556b1594bd7ab9e3b3fa939d8e3e03ae58fa180 Image 5 (fdt@xilfpga) Description: MIPSfpga (xilfpga) Device Tree Created: Tue Jul 28 02:24:45 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 2708 Bytes = 2.64 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 63d058b780f65e22da30f0a183433765f1807f1d Default Configuration: 'conf@default' Configuration 0 (conf@default) Description: Generic Linux kernel Kernel: kernel@0 Configuration 1 (conf@boston) Description: Boston Linux kernel Kernel: kernel@0 FDT: fdt@boston Configuration 2 (conf@ni169445) Description: NI 169445 Linux Kernel Kernel: kernel@0 FDT: fdt@ni169445 Configuration 3 (conf@ocelot_pcb123) Description: Ocelot Linux kernel Kernel: kernel@0 FDT: fdt@ocelot_pcb123 Configuration 4 (conf@ocelot_pcb120) Description: Ocelot Linux kernel Kernel: kernel@0 FDT: fdt@ocelot_pcb120 Configuration 5 (conf@xilfpga) Description: MIPSfpga Linux kernel Kernel: kernel@0 FDT: fdt@xilfpga Completed OK # rm -rf /kisskb/build/powerpc-fixes_mips-defconfig_mipsel # Build took: 0:02:02.397475

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