On Sat, Feb 15, 2025 at 01:34:33PM +0100, Malte Schröder wrote: > Hi, > I am getting stuff freezing randomly since 6.14-rc. I do not have a clear way to When you say "since 6.14-rc", what exactly do you mean? 6.13 is fine and 6.14-rc2 is broken? Or some other version? > [19136.543931] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: > [19136.543938] rcu: Tasks blocked on level-1 rcu_node (CPUs 16-31): P314703 > [19136.543943] rcu: (detected by 29, t=21002 jiffies, g=8366533, q=26504 ncpus=32) > [19136.543946] task:KIO::WorkerThre state:R running task stack:0 pid:314703 tgid:314656 ppid:3984 task_flags:0x400040 flags:0x00004006 > [19136.543951] Call Trace: > [19136.543953] <TASK> > [19136.543958] __schedule+0x784/0x1520 > [19136.543963] ? __schedule+0x784/0x1520 > [19136.543966] ? __schedule+0x784/0x1520 > [19136.543969] preempt_schedule_irq+0x52/0x90 > [19136.543972] raw_irqentry_exit_cond_resched+0x2f/0x40 > [19136.543975] irqentry_exit+0x3e/0x50 > [19136.543977] irqentry_exit+0x3e/0x50 > [19136.543979] ? sysvec_apic_timer_interrupt+0x48/0x90 > [19136.543982] ? asm_sysvec_apic_timer_interrupt+0x1f/0x30 > [19136.543985] ? local_clock_noinstr+0x10/0xc0 > [19136.543987] ? local_clock+0x14/0x30 > [19136.543990] ? __lock_acquire+0x1fd/0x6c0 > [19136.543995] ? local_clock+0x14/0x30 > [19136.543997] ? lock_release+0x120/0x470 > [19136.544000] ? find_get_entries+0x76/0x2e0 > [19136.544004] ? find_get_entries+0xfb/0x2e0 > [19136.544006] ? find_get_entries+0x76/0x2e0 > [19136.544011] ? shmem_undo_range+0x35f/0x520 > [19136.544027] ? shmem_evict_inode+0x135/0x290 This seems very similar to all of these syzbot reports: https://lore.kernel.org/linux-bcachefs/Z6-o5A4Y-rf7Hq8j@xxxxxxxxxxxxxxxxxxxx/ Fortunately, syzbot thinks it's bisected one of them: https://lore.kernel.org/linux-bcachefs/67b0bf29.050a0220.6f0b7.0010.GAE@xxxxxxxxxx/ Can you confirm?
