Messages in this thread | | | From | Sergey Senozhatsky <> | Date | Wed, 19 Dec 2018 00:14:55 +0900 | Subject | Re: [RFC][PATCH] printk: increase devkmsg write() ratelimit |
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On (12/18/18 16:03), Borislav Petkov wrote: > On Tue, Dec 18, 2018 at 11:55:58PM +0900, Sergey Senozhatsky wrote: > > Good question. Theoretically, there can be some interesting stuff. > > Examples: https://bugzilla.redhat.com/show_bug.cgi?id=1515373#c6 > > or https://github.com/systemd/systemd/issues/5433 > > Just like that last page says, people should use the printk.devkmsg= > option when they wanna see all messages. Normally, we do add cmdline > options to the kernel cmdline when debugging, like > > debug ignore_loglevel log_buf_len=16M ...
Right, but unlike log_buf_len, devkmsg is a bit close to a "binary" knob: either all messages or none; it's not like we can say "printk.devkmsg=100 messages per 5 * HZ max".
-ss
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