lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <YyS2aoPoC2TznZHO@boqun-archlinux> Date: Fri, 16 Sep 2022 10:46:18 -0700 From: Boqun Feng <boqun.feng@...il.com> To: Waiman Long <longman@...hat.com> Cc: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, Shaokun Zhang <zhangshaokun@...ilicon.com>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, Petr Mladek <pmladek@...e.com>, Andrew Morton <akpm@...ux-foundation.org>, Ben Dooks <ben.dooks@...ive.com>, Rasmus Villemoes <linux@...musvillemoes.dk>, Luis Chamberlain <mcgrof@...nel.org>, Xiaoming Ni <nixiaoming@...wei.com>, John Ogness <john.ogness@...utronix.de>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH (repost)] locking/lockdep: add debug_show_all_lock_holders() On Fri, Sep 16, 2022 at 10:51:14AM -0400, Waiman Long wrote: [...] > > > > I'm expecting lockdep to continue working without calling printk() even after > > one of problem patterns (e.g. circular locking dependency) was printk()ed, so that > > debug_show_all_locks()/debug_show_all_lock_holders() can call printk() when needed. > > > > Changing debug_locks behavior is a future patch. For now, this patch alone > > will help debugging Greg's usb.git#usb-testing tree which is generating > > many "INFO: task hung in" reports. The default behavior today does make sense: if the system has one deadlock it should be fixed first before searching out another. So I expect that changing debug_locks behavior would be configurable and we keep the default as today. > > Boqun is actually working on a modularization patch to make some lockdep > checking still active even after a lockdep bug is reported. I think he will > take into consideration about this request. > Yes, this is one of the "problems" I try to resolve while cleaning up the lockdep. Regards, Boqun > Cheers, > Longman >
Powered by blists - more mailing lists