Source: linux Version: 6.1.115-1 Severity: important Tags: upstream X-Debbugs-Cc: d...@debian.org
Dear maintainers, Since the last Bookworm point release, the build daemons often run into a io_uring deadlock when building chromium: [123733.312356] INFO: task iou-sqp-2625111:2625119 blocked for more than 120 seconds. [123733.313547] Not tainted 6.1.0-27-amd64 #1 Debian 6.1.115-1 [123733.314418] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [123733.315543] task:iou-sqp-2625111 state:D stack:0 pid:2625119 ppid:2625110 flags:0x00004000 [123733.315548] Call Trace: [123733.315550] <TASK> [123733.315556] __schedule+0x34d/0x9e0 [123733.315583] schedule+0x5a/0xd0 [123733.315586] schedule_preempt_disabled+0x11/0x20 [123733.315589] __mutex_lock.constprop.0+0x399/0x700 [123733.315594] io_sq_thread+0x26e/0x4e0 [123733.315600] ? cpuusage_read+0x10/0x10 [123733.315604] ? io_sqd_handle_event+0xd0/0xd0 [123733.315607] ret_from_fork+0x22/0x30 [123733.315613] </TASK> We have observed that 3 times on amd64, and once on arm64, so it's not a random issue, although so far we only observed this problem when building chromium. There was no such issue with kernel 6.1.112-1. Looking at the queued patches for 6.1.118, I noticed that this one is a possible candidate for fixing the issue: https://patchwork.kernel.org/project/io-uring/patch/20240604130527.3597-1-hagar...@amazon.com/ That said I haven't tested it. Regards Aurelien
