Re: [PATCH][v3] rtnetlink: add rtnl_lock debug log
From: Cong Wang <hidden>
Date: 2021-05-12 18:57:39
Also in:
linux-mediatek, lkml, netdev
On Wed, May 12, 2021 at 1:38 AM Rocco.Yue [off-list ref] wrote:
On Tue, 2021-05-11 at 10:00 -0700, Cong Wang wrote:quoted
On Tue, May 11, 2021 at 4:46 AM Rocco yue [off-list ref] wrote:quoted
From: Rocco Yue <redacted> We often encounter system hangs caused by certain process holding rtnl_lock for a long time. Even if there is a lock detection mechanism in Linux, it is a bit troublesome and affects the system performance. We hope to add a lightweight debugging mechanism for detecting rtnl_lock.Any reason why this is specific to RTNL lock? To me holding a mutex lock for a long time is problematic for any mutex. I have seen some fs mutex being held for a long time caused many hung tasks in the system. Thanks.Thank you for a good question. It's a problem to hold rtnl_lock for a long time, and other locks are no exception.
Then please try to make it generic so that other mutex locks will benefit too. Thanks. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel