From: David Laight <David.Laight@ACULAB.COM>
To: 'Joe Perches' <joe@perches.com>,
John Ogness <john.ogness@linutronix.de>,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [RFC PATCH 1/5] printk: implement pr_cont_t
Date: Thu, 20 Aug 2020 08:49:35 +0000 [thread overview]
Message-ID: <389a62f178d2482b9525f499b82e92df@AcuMS.aculab.com> (raw)
In-Reply-To: <29b6120680fbfb51936bb9100b2c9bb78385aef0.camel@perches.com>
From: Joe Perches
> Sent: 20 August 2020 09:00
>
> On Thu, 2020-08-20 at 07:44 +0000, David Laight wrote:
> > I've no idea how you'd 'size' the number of buffers.
>
> I believe they are static and assume no more than 10
> simultaneous uses of printk_begin
What I meant was how you'd work out whether 10 was
in any way appropriate.
ISTM it is either 'too many' or 'nowhere near enough'
depending on exactly what the system is doing.
And if code 'leaks' them you are in deep doo-doos.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2020-08-20 8:49 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-19 23:26 [RFC PATCH 0/5] printk: new log_cont implementation John Ogness
2020-08-19 23:26 ` [RFC PATCH 1/5] printk: implement pr_cont_t John Ogness
2020-08-20 0:33 ` Joe Perches
2020-08-20 7:44 ` David Laight
2020-08-20 7:59 ` Joe Perches
2020-08-20 8:49 ` David Laight [this message]
2020-08-20 9:18 ` John Ogness
2020-08-20 16:03 ` Joe Perches
2020-08-20 10:16 ` Petr Mladek
2020-08-20 12:33 ` David Laight
2020-08-25 13:10 ` Petr Mladek
2020-08-25 13:38 ` David Laight
2020-08-25 15:32 ` Petr Mladek
2020-08-24 2:08 ` Sergey Senozhatsky
2020-08-24 5:37 ` Sergey Senozhatsky
2020-08-19 23:26 ` [RFC PATCH 2/5] sysrq: use pr_cont_t for cont messages John Ogness
2020-08-20 1:03 ` Linus Torvalds
2020-08-20 17:48 ` Joe Perches
2020-08-20 17:53 ` Linus Torvalds
2020-08-20 22:11 ` John Ogness
2020-08-20 22:36 ` Joe Perches
2020-08-19 23:26 ` [RFC PATCH 3/5] workqueue: " John Ogness
2020-08-19 23:26 ` [RFC PATCH 4/5] locking/selftest: " John Ogness
2020-08-19 23:26 ` [RFC PATCH 5/5] lockdep: " John Ogness
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