Re: [PATCH] mm,page_alloc: softlockup on warn_alloc on
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: 2017-09-16 04:12:45
Johannes Weiner wrote:
On Fri, Sep 15, 2017 at 05:58:49PM +0800, wang Yu wrote:quoted
From: "yuwang.yuwang" <redacted> I found a softlockup when running some stress testcase in 4.9.x, but i think the mainline have the same problem. call trace: [365724.502896] NMI watchdog: BUG: soft lockup - CPU#31 stuck for 22s! [jbd2/sda3-8:1164]We've started seeing the same thing on 4.11. Tons and tons of allocation stall warnings followed by the soft lock-ups.
Forgot to comment. Since you are able to reproduce the problem (aren't you?), please try setting 1 to /proc/sys/kernel/softlockup_all_cpu_backtrace so that we can know what other CPUs are doing. It does not need to patch kernels. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>