From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Zhou Guanghui <zhouguanghui1@huawei.com>,
Will Deacon <will@kernel.org>, Sasha Levin <sashal@kernel.org>,
joro@8bytes.org, iommu@lists.linux-foundation.org
Subject: [PATCH AUTOSEL 5.4 14/37] iommu/arm-smmu-v3: fix event handling soft lockup
Date: Fri, 1 Apr 2022 10:44:23 -0400 [thread overview]
Message-ID: <20220401144446.1954694-14-sashal@kernel.org> (raw)
In-Reply-To: <20220401144446.1954694-1-sashal@kernel.org>
From: Zhou Guanghui <zhouguanghui1@huawei.com>
[ Upstream commit 30de2b541af98179780054836b48825fcfba4408 ]
During event processing, events are read from the event queue one
by one until the queue is empty.If the master device continuously
requests address access at the same time and the SMMU generates
events, the cyclic processing of the event takes a long time and
softlockup warnings may be reported.
arm-smmu-v3 arm-smmu-v3.34.auto: event 0x0a received:
arm-smmu-v3 arm-smmu-v3.34.auto: 0x00007f220000280a
arm-smmu-v3 arm-smmu-v3.34.auto: 0x000010000000007e
arm-smmu-v3 arm-smmu-v3.34.auto: 0x00000000034e8670
watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [irq/268-arm-smm:247]
Call trace:
_dev_info+0x7c/0xa0
arm_smmu_evtq_thread+0x1c0/0x230
irq_thread_fn+0x30/0x80
irq_thread+0x128/0x210
kthread+0x134/0x138
ret_from_fork+0x10/0x1c
Kernel panic - not syncing: softlockup: hung tasks
Fix this by calling cond_resched() after the event information is
printed.
Signed-off-by: Zhou Guanghui <zhouguanghui1@huawei.com>
Link: https://lore.kernel.org/r/20220119070754.26528-1-zhouguanghui1@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iommu/arm-smmu-v3.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index ef6af714a7e6..02c2fb551f38 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1708,6 +1708,7 @@ static irqreturn_t arm_smmu_evtq_thread(int irq, void *dev)
dev_info(smmu->dev, "\t0x%016llx\n",
(unsigned long long)evt[i]);
+ cond_resched();
}
/*
--
2.34.1
next prev parent reply other threads:[~2022-04-01 15:04 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-01 14:44 [PATCH AUTOSEL 5.4 01/37] drm: Add orientation quirk for GPD Win Max Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 02/37] ath5k: fix OOB in ath5k_eeprom_read_pcal_info_5111 Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 03/37] drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 04/37] ptp: replace snprintf with sysfs_emit Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 05/37] powerpc: dts: t104xrdb: fix phy type for FMAN 4/5 Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 06/37] bpf: Make dst_port field in struct bpf_sock 16-bit wide Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 07/37] scsi: mvsas: Replace snprintf() with sysfs_emit() Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 08/37] scsi: bfa: " Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 09/37] power: supply: axp20x_battery: properly report current when discharging Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 10/37] ipv6: make mc_forwarding atomic Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 11/37] powerpc: Set crashkernel offset to mid of RMA region Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 12/37] drm/amdgpu: Fix recursive locking warning Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 13/37] PCI: aardvark: Fix support for MSI interrupts Sasha Levin
2022-04-01 14:44 ` Sasha Levin [this message]
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 15/37] usb: ehci: add pci device support for Aspeed platforms Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 16/37] PCI: pciehp: Add Qualcomm quirk for Command Completed erratum Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 17/37] power: supply: axp288-charger: Set Vhold to 4.4V Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 18/37] ipv4: Invalidate neighbour for broadcast address upon address addition Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 19/37] dm ioctl: prevent potential spectre v1 gadget Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 20/37] drm/amdkfd: make CRAT table missing message informational only Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 21/37] scsi: pm8001: Fix pm8001_mpi_task_abort_resp() Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 22/37] scsi: aha152x: Fix aha152x_setup() __setup handler return value Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 23/37] net/smc: correct settings of RMB window update limit Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 24/37] mips: ralink: fix a refcount leak in ill_acc_of_setup() Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 25/37] macvtap: advertise link netns via netlink Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 26/37] tuntap: add sanity checks about msg_controllen in sendmsg Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 27/37] iommu/iova: Improve 32-bit free space estimate Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 28/37] bnxt_en: Eliminate unintended link toggle during FW reset Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 29/37] MIPS: fix fortify panic when copying asm exception handlers Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 30/37] powerpc/code-patching: Pre-map patch area Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 31/37] scsi: libfc: Fix use after free in fc_exch_abts_resp() Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 32/37] usb: dwc3: omap: fix "unbalanced disables for smps10_out1" on omap5evm Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 33/37] xtensa: fix DTC warning unit_address_format Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 34/37] Bluetooth: Fix use after free in hci_send_acl Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 35/37] netlabel: fix out-of-bounds memory accesses Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 36/37] init/main.c: return 1 from handled __setup() functions Sasha Levin
2022-04-01 14:44 ` [PATCH AUTOSEL 5.4 37/37] minix: fix bug when opening a file with O_DIRECT Sasha Levin
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