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Message-ID: <20180414023516.GA17806@tigerII.localdomain> Date: Sat, 14 Apr 2018 11:35:16 +0900 From: Sergey Senozhatsky <sergey.senozhatsky@...il.com> To: Steven Rostedt <rostedt@...dmis.org> Cc: Petr Mladek <pmladek@...e.com>, Sergey Senozhatsky <sergey.senozhatsky@...il.com>, akpm@...ux-foundation.org, linux-mm@...ck.org, Peter Zijlstra <peterz@...radead.org>, Jan Kara <jack@...e.cz>, Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>, Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>, Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] printk: Ratelimit messages printed by console drivers On (04/13/18 10:12), Steven Rostedt wrote: > > > The interval is set to one hour. It is rather arbitrary selected time. > > It is supposed to be a compromise between never print these messages, > > do not lockup the machine, do not fill the entire buffer too quickly, > > and get information if something changes over time. > > > I think an hour is incredibly long. We only allow 100 lines per hour for > printks happening inside another printk? > > I think 5 minutes (at most) would probably be plenty. One minute may be > good enough. Besides 100 lines is absolutely not enough for any real lockdep splat. My call would be - up to 1000 lines in a 1 minute interval. -ss
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