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[23.128.96.18]) by mx.google.com with ESMTP id gb17si5482373ejc.171.2020.12.18.13.31.36; Fri, 18 Dec 2020 13:31:59 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725813AbgLRVak (ORCPT + 99 others); Fri, 18 Dec 2020 16:30:40 -0500 Received: from outpost1.zedat.fu-berlin.de ([130.133.4.66]:33483 "EHLO outpost1.zedat.fu-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725836AbgLRVai (ORCPT ); Fri, 18 Dec 2020 16:30:38 -0500 Received: from inpost2.zedat.fu-berlin.de ([130.133.4.69]) by outpost.zedat.fu-berlin.de (Exim 4.94) with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (envelope-from ) id 1kqNJr-000dfM-3d; Fri, 18 Dec 2020 22:29:47 +0100 Received: from p5b13a238.dip0.t-ipconnect.de ([91.19.162.56] helo=[192.168.178.139]) by inpost2.zedat.fu-berlin.de (Exim 4.94) with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (envelope-from ) id 1kqNJq-003t0R-Pt; Fri, 18 Dec 2020 22:29:47 +0100 Subject: Re: [PATCH v2 05/15] ia64: convert to legacy_timer_tick To: Arnd Bergmann , linux-kernel@vger.kernel.org Cc: Thomas Gleixner , Arnd Bergmann , Russell King , Tony Luck , Fenghua Yu , Greg Ungerer , Finn Thain , Philip Blundell , Joshua Thompson , Sam Creasey , "James E.J. Bottomley" , Helge Deller , Daniel Lezcano , John Stultz , Stephen Boyd , Linus Walleij , linux-ia64@vger.kernel.org, Parisc List , linux-m68k , Linux ARM , Mike Rapoport , Anatoly Pugachev References: <20201030151758.1241164-1-arnd@kernel.org> <20201030151758.1241164-6-arnd@kernel.org> From: John Paul Adrian Glaubitz Message-ID: <59efce0e-a28d-9424-82ca-fb7f3a1b9c29@physik.fu-berlin.de> Date: Fri, 18 Dec 2020 22:29:45 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 MIME-Version: 1.0 In-Reply-To: <20201030151758.1241164-6-arnd@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Original-Sender: glaubitz@physik.fu-berlin.de X-Originating-IP: 91.19.162.56 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Arnd! On 10/30/20 4:17 PM, Arnd Bergmann wrote: > ia64 is the only architecture that calls xtime_update() in a loop, > once for each jiffie that has passed since the last event. > > Before commit 3171a0305d62 ("[PATCH] simplify update_times (avoid > jiffies/jiffies_64 aliasing problem)") in 2006, it could not actually do > this any differently, but now it seems simpler to just pass the number > of jiffies that passed in the meantime. > > While this loses the ability process interrupts in the middle of > the timer tick by calling local_irq_enable(), doing so is fairly > peculiar anyway and it seems better to just do what everyone > else does here. This broke the hpsa block device driver on my HP RX2600. I'm seeing this backtrace now: [ 905.883273] usb 1-2: SerialNumber: A60020000001 [ 905.918170] sda: sda1 sda2 sda3 [ 905.920107] sd 0:1:0:0: [sda] Attached SCSI disk [ 905.944102] usb-storage 1-2:1.0: USB Mass Storage device detected [ 905.944102] scsi host1: usb-storage 1-2:1.0 [ 905.944102] usbcore: registered new interface driver usb-storage [ 905.944117] usbcore: registered new interface driver uas [ 905.948117] scsi 1:0:0:0: CD-ROM TEAC DV-W28EAW H.0C PQ: 0 ANSI: 0 [ 905.952013] usb 2-1: new full-speed USB device number 2 using ohci-pci [ 905.956102] sr 1:0:0:0: Power-on or device reset occurred [ 905.968107] sr 1:0:0:0: [sr0] scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray [ 905.968107] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 906.028013] ioc0: LSISAS1068 B0: Capabilities={Initiator} [ 906.028110] tg3 0000:01:02.0 eth0: Tigon3 [partno(BCM95700A6) rev 2100] (PCIX:66MHz:64-bit) MAC address 00:17:a4:99:2d:09 [ 906.026167] usb 2-1: New USB device found, idVendor=03f0, idProduct=1126, bcdDevice= 0.01 [ 906.028110] tg3 0000:01:02.0 eth0: attached PHY is 5704 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[0]) [ 906.028110] tg3 0000:01:02.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1] [ 906.030214] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=63 [ 906.032240] tg3 0000:01:02.0 eth0: dma_rwctrl[769f0000] dma_mask[64-bit] [ 906.036102] GSI 30 (level, low) -> CPU 2 (0x0200) vector 67 [ 906.034186] usb 2-1: Product: Virtual Management Device [ 906.038235] usb 2-1: Manufacturer: HP [ 906.040017] usb 2-1: SerialNumber: 0017a499dd1c [ 906.056108] hid: raw HID events driver (C) Jiri Kosina [ 906.080013] usbcore: registered new interface driver usbhid [ 906.080013] usbhid: USB HID core driver [ 906.080107] input: HP Virtual Management Device as /devices/pci0000:00/0000:00:02.0/usb2/2-1/2-1:1.0/0003:03F0:1126.0001/input/input2 [ 906.088110] hid-generic 0003:03F0:1126.0001: input,hidraw0: USB HID v1.11 Keyboard [HP Virtual Management Device] on usb-0000:00:02.0-1/input0 [ 906.088110] input: HP Virtual Management Device as /devices/pci0000:00/0000:00:02.0/usb2/2-1/2-1:1.1/0003:03F0:1126.0002/input/input3 [ 906.092110] hid-generic 0003:03F0:1126.0002: input,hidraw1: USB HID v1.01 Mouse [HP Virtual Management Device] on usb-0000:00:02.0-1/input1 [ 906.104104] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.108288] hpsa 0000:05:00.0: device is ready. [ 906.108288] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.152107] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.170926] hpsa 0000:05:00.0: device is ready. [ 906.170926] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.218925] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.222925] hpsa 0000:05:00.0: device is ready. [ 906.222925] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.266926] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.272016] hpsa 0000:05:00.0: device is ready. [ 906.272016] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.272107] scsi host2: ioc0: LSISAS1068 B0, FwRev=010f0000h, Ports=1, MaxQ=511, IRQ=62 [ 906.324110] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.330925] hpsa 0000:05:00.0: device is ready. [ 906.330925] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.378925] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.382926] hpsa 0000:05:00.0: device is ready. [ 906.382926] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.386926] tg3 0000:01:02.1 eth1: Tigon3 [partno(BCM95700A6) rev 2100] (PCIX:66MHz:64-bit) MAC address 00:17:a4:99:2d:08 [ 906.386926] tg3 0000:01:02.1 eth1: attached PHY is 5704 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[0]) [ 906.388016] tg3 0000:01:02.1 eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1] [ 906.388016] tg3 0000:01:02.1 eth1: dma_rwctrl[769f0000] dma_mask[64-bit] [ 906.396108] tg3 0000:01:02.1 enp1s2f1: renamed from eth1 [ 906.408107] tg3 0000:01:02.0 enp1s2f0: renamed from eth0 Begin: Loading essential drivers ... done. Begin: Running /scripts/init-premount ... done. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done. Begin: Running /scripts/local-premount ... done. Begin: Will now check root file system ... fsck from util-linux 2.36 [/sbin/fsck.ext4 (1) -- /dev/sda2] fsck.ext4 -a -C0 /dev/sda2 /dev/sda2: clean, 317994/2068416 files, 6480495/8257536 blocks [ 906.666923] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 906.670923] hpsa 0000:05:00.0: device is ready. [ 906.670923] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 done. [ 906.722166] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [ 906.722166] rcu: 2-....: (3 ticks this GP) idle=fe6/1/0x4000000000000000 softirq=693/698 fqs=4 [ 906.722166] (detected by 0, t=6115 jiffies, g=465, q=80) [ 906.722166] Task dump for CPU 2: [ 906.722166] task:modprobe state:R running task stack: 0 pid: 162 ppid: 146 flags:0x00000002 [ 906.722166] [ 906.722166] Call Trace: [ 906.722166] [<0000000000000fd6>] 0xfd6 [ 906.722166] sp=e000010046d27c70 bsp=e000010046d20e80 [ 906.782168] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [ 906.782168] rcu: 2-....: (18 ticks this GP) idle=fe6/1/0x4000000000000000 softirq=693/698 fqs=18 [ 906.782168] (detected by 0, t=22157 jiffies, g=465, q=80) [ 906.782168] Task dump for CPU 2: [ 906.782168] task:modprobe state:R running task stack: 0 pid: 162 ppid: 146 flags:0x00000002 [ 906.782168] [ 906.782168] Call Trace: [ 906.782168] [<0000001d00000065>] 0x1d00000065 [ 906.782168] sp=e000010046d27c70 bsp=e000010046d20d48 [ 906.844107] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null) done. Begin: Running /scripts/local-bottom ... done. Begin: Running /scripts/init-bottom ... done. [ 906.978917] Not activating Mandatory Access Control as /sbin/tomoyo-init does not exist. [ 907.726923] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.734923] hpsa 0000:05:00.0: device is ready. [ 907.734923] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.790923] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.802923] hpsa 0000:05:00.0: device is ready. [ 907.802923] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.860014] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.886923] hpsa 0000:05:00.0: device is ready. [ 907.886923] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.930923] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.942923] hpsa 0000:05:00.0: device is ready. [ 907.942923] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.976107] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 907.982923] hpsa 0000:05:00.0: device is ready. [ 907.982923] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.106923] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.110923] hpsa 0000:05:00.0: device is ready. [ 908.110923] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.256014] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.258922] hpsa 0000:05:00.0: device is ready. [ 908.258922] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.428014] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.434923] hpsa 0000:05:00.0: device is ready. [ 908.434923] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.710922] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.714922] hpsa 0000:05:00.0: device is ready. [ 908.714922] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.754922] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.758922] hpsa 0000:05:00.0: device is ready. [ 908.758922] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 908.788106] systemd[1]: Inserted module 'autofs4' [ 908.972107] systemd[1]: systemd 246.6-5 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +ZSTD -SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=hybrid) [ 908.976013] systemd[1]: Detected architecture ia64. Welcome to Debian GNU/Linux bullseye/sid! [ 909.020014] systemd[1]: Set hostname to . [ 909.178923] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 909.182922] hpsa 0000:05:00.0: device is ready. [ 909.182922] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 909.242922] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 909.254922] hpsa 0000:05:00.0: device is ready. [ 909.254922] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 909.322922] hpsa 0000:05:00.0: scsi 0:1:0:0: resetting logical Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 909.334922] hpsa 0000:05:00.0: device is ready. [ 909.334922] hpsa 0000:05:00.0: scsi 0:1:0:0: reset logical completed successfully Direct-Access HP LOGICAL VOLUME RAID-0 SSDSmartPathCap- En- Exp=1 [ 909.360108] INFO: task systemd-sysv-ge:200 blocked for more than 127 seconds. [ 909.360108] Not tainted 5.10.0+ #130 [ 909.360108] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 909.360108] task:systemd-sysv-ge state:D stack: 0 pid: 200 ppid: 189 flags:0x00000000 [ 909.364108] [ 909.364108] Call Trace: [ 909.364423] [] __schedule+0x890/0x21e0 [ 909.364423] sp=e0000100487d7b70 bsp=e0000100487d1748 [ 909.368423] [] schedule+0xa0/0x240 [ 909.368423] sp=e0000100487d7b90 bsp=e0000100487d16e0 [ 909.368558] [] io_schedule+0x70/0xa0 [ 909.368558] sp=e0000100487d7b90 bsp=e0000100487d16c0 [ 909.372290] [] bit_wait_io+0x20/0xe0 [ 909.372290] sp=e0000100487d7b90 bsp=e0000100487d1698 [ 909.374168] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [ 909.376290] [] __wait_on_bit+0xc0/0x1c0 [ 909.376290] sp=e0000100487d7b90 bsp=e0000100487d1648 [ 909.374168] rcu: 3-....: (2 ticks this GP) idle=19e/1/0x4000000000000002 softirq=1581/1581 fqs=2 [ 909.374168] (detected by 0, t=5661 jiffies, g=1089, q=3) [ 909.376290] [] out_of_line_wait_on_bit+0x120/0x140 [ 909.376290] sp=e0000100487d7b90 bsp=e0000100487d1610 [ 909.374168] Task dump for CPU 3: [ 909.374168] task:khungtaskd state:R running task Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaubitz@debian.org `. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913