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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id y24sm10767552qtv.71.2020.08.24.05.29.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Aug 2020 05:29:38 -0700 (PDT) Date: Mon, 24 Aug 2020 08:29:30 -0400 From: Qian Cai To: Rong Chen Cc: Catalin Marinas , Linus Torvalds , Matthew Wilcox , Michal Hocko , Andrew Morton , LKML , lkp@lists.01.org Subject: Re: [mm] c566586818: BUG:kernel_hang_in_early-boot_stage,last_printk:Probing_EDD(edd=off_to_disable)...ok Message-ID: <20200824122929.GA4337@lca.pw> References: <20200818002351.GC18179@shao2-debian> <20200821010132.GC4622@lca.pw> <5e286a22-921c-8e2b-14dc-7ef96e320010@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <5e286a22-921c-8e2b-14dc-7ef96e320010@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 24, 2020 at 10:47:20AM +0800, Rong Chen wrote: > > > On 8/21/20 9:01 AM, Qian Cai wrote: > > On Tue, Aug 18, 2020 at 08:23:51AM +0800, kernel test robot wrote: > > > Greeting, > > > > > > FYI, we noticed the following commit (built with gcc-9): > > > > > > commit: c5665868183fec689dbab9fb8505188b2c4f0757 ("mm: kmemleak: use the memory pool for early allocations") > > I might see one of those early boot failure before. In my case, the bare-metal > > system was reset. Can you try to narrow down to a smaller > > CONFIG_DEBUG_KMEMLEAK_MEM_POOL_SIZE (assume 0 works if your bisecting was > > correct) that works? > > Hi Qian, > > Adding CONFIG_EARLY_PRINTK=y to the kconfig file, and the boot hangs in the > below position: > > [    0.715834] Kernel command line: root=/dev/ram0 hung_task_panic=1 debug > apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 > net.ifnames=0 printk.devkmsg=on panic=-1 softlockup_panic=1 > nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 > drbd.minor_count=8 > systemd.log_level=err ignore_loglevel console=tty0 earlyprintk=ttyS0,115200 > console=ttyS0,115200 vga=normal rw rcuperf.shutdown=0 watchdog_thresh=60 > [    0.719688] sysrq: sysrq always enabled. > [    0.801005] Dentry cache hash table entries: 2097152 (order: 12, 16777216 > bytes, linear) > [    0.805588] Inode-cache hash table entries: 1048576 (order: 11, 8388608 > bytes, linear) > [    0.806464] mem auto-init: stack:off, heap alloc:on, heap free:off > [    1.080978] Memory: 12319196K/12680692K available (10243K kernel code, > 2414K rwdata, 8184K rodata, 856K init, 20772K bss, 361496K reserved, 0K > cma-reserved) > qemu-system-x86_64: terminating on signal 2 > > The problem disappeared if CONFIG_DEBUG_KMEMLEAK_MEM_POOL_SIZE=400: Interesting. Can you paste the line as show: ./scripts/faddr2line vmlinux lookup_address_in_pgd+0xd1/0x158 Also, does this happens on the latest mainline or linux-next? Looks like you were reproducing using v5.3. > > [    1.064575] Kernel command line: root=/dev/ram0 hung_task_panic=1 debug > apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 > net.ifnames=0 printk.devkmsg=on panic=-1 softlockup_panic=1 > nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 > drbd.minor_count=8 > systemd.log_level=err ignore_loglevel console=tty0 earlyprintk=ttyS0,115200 > console=ttyS0,115200 vga=normal rw rcuperf.shutdown=0 watchdog_thresh=60 > [    1.068883] sysrq: sysrq always enabled. > [    1.108720] Dentry cache hash table entries: 2097152 (order: 12, 16777216 > bytes, linear) > [    1.148852] Inode-cache hash table entries: 1048576 (order: 11, 8388608 > bytes, linear) > [    1.150271] mem auto-init: stack:off, heap alloc:on, heap free:off > [    1.835309] Memory: 12325340K/12680692K available (10243K kernel code, > 2414K rwdata, 8192K rodata, 856K init, 14628K bss, 355352K reserved, 0K > cma-reserved) > [    3.487078] general protection fault: 0000 [#1] DEBUG_PAGEALLOC PTI > [    3.488185] CPU: 0 PID: 0 Comm: swapper Not tainted > 5.3.0-11792-gc5665868183fe #1 > [    3.489581] RIP: 0010:lookup_address_in_pgd+0xd1/0x158 > [    3.490566] Code: 80 e0 01 0f 84 a7 00 00 00 49 89 f0 b8 11 ff ff 01 48 > 21 f9 49 c1 e8 12 48 c1 e0 27 41 81 e0 f8 0f 00 00 49 01 c0 49 8d 04 08 <48> > f7 00 9f ff ff ff 0f 84 34 ff ff ff c7 02 02 00 00 00 48 8b 38 > [    3.494020] RSP: 0000:ffffffff8239e700 EFLAGS: 00010086 > [    3.494959] RAX: ffff110302110d90 RBX: 0000000000000001 RCX: > ffff888302110000 > [    3.496222] RDX: ffffffff8239e72c RSI: ffff88833653b000 RDI: > ffff88833653a000 > [    3.497363] RBP: ffffffff8239e808 R08: ffff888000000d90 R09: > 0000000000346000 > [    3.498467] R10: 0000000000000001 R11: 0000000000000000 R12: > 0000000000000001 > [    3.499554] R13: 0000000000000000 R14: ffff88833653b000 R15: > 0000000000000000 > [    3.500638] FS:  0000000000000000(0000) GS:ffffffff8243d000(0000) > knlGS:0000000000000000 > [    3.501863] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [    3.503036] CR2: ffff8883447ff000 CR3: 0000000002420000 CR4: > 00000000000006b0 > [    3.504116] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [    3.505156] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > [    3.506225] Call Trace: > [    3.506597] Modules linked in: > [    3.507255] random: get_random_bytes called from init_oops_id+0x1d/0x2c > with crng_init=0 > [    3.508734] ---[ end trace 0000000000000000 ]--- > > > Best Regards, > Rong Chen