On Wed, Nov 29, 2023 at 6:32 PM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > On Wed, Nov 29, 2023 at 05:33:33PM +0800, Zhengyuan Liu wrote: > > Hi, all > > > > We are encountering a perf related soft lockup as shown below: > > > > [25023823.265138] watchdog: BUG: soft lockup - CPU#29 stuck for 45s! > > [YD:3284696] > > [25023823.275772] net_failover virtio_scsi failover > > [25023823.276750] CPU: 29 PID: 3284696 Comm: YD Kdump: loaded Not > > tainted 4.19.90-23.18.v2101.ky10.aarch64 #1 > ^^^^^^^^^^^^^^^^^^^ > > That is some unholy ancient kernel. Please see if you can reproduce on > something recent. Sorry for the late reply since my company mail server has some trouble. I don't have a reproducer, It's an online server and happens once every few months. >From our analysis, the recent kernel shouldn't have this problem after commit bd27568117664（“perf: Rewrite core context handling”). But LTS branches such as v4.19 and v5.4 will be used for a long time, so I think it's worth fixing this problem. Thanks,
