From: Willy Tarreau <w@1wt.eu>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
Antonio SJ Musumeci <trapexit@spawn.link>,
Miklos Szeredi <miklos@szeredi.hu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
stable <stable@vger.kernel.org>
Subject: Re: BUG_ON() in workingset_node_shadows_dec() triggers
Date: Wed, 5 Oct 2016 23:09:00 +0200 [thread overview]
Message-ID: <20161005210900.GB8116@1wt.eu> (raw)
In-Reply-To: <CA+55aFxMf+-0B4oEqAiRcNm5A=S1eFu0ugRJUJX02K4yA_xNjg@mail.gmail.com>
On Wed, Oct 05, 2016 at 12:18:51PM -0700, Linus Torvalds wrote:
> Quite frankly, I wouldn't do a sed-script pass to actually change
> existing users. I'd just change how the BUG() implementation itself
> works. Not make it a direct WARN_ON(), but perhaps something like
>
> - use WARN_ON() with a global rate limiter (we do *not* want BUG
> cascades, but re-enable the warning after a few minutes)
That's interesting, I had exactly this discussion at kernel recipes
last week with someone complaining that when warnings scroll, you
only see the last ones while only the first one is useful. I guess
in most situations we don't even need a rate limiter, just print a
single dump and wait 2 minutes or so for the person in front of the
screen to have the time to take a photo.
> - have some kernel command line option for the server people to allow
> them to just force a reboot for it
Good point for not doing the sed.
> Hmm?
>
> Anybody want to play with it?
Many people will be much more efficient than me at doing it and even
testing it so I won't volunteer here.
Willy
next prev parent reply other threads:[~2016-10-05 21:13 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-04 4:00 BUG_ON() in workingset_node_shadows_dec() triggers Linus Torvalds
2016-10-04 4:07 ` Andrew Morton
2016-10-04 4:12 ` Linus Torvalds
2016-10-04 7:03 ` Raymond Jennings
2016-10-04 16:03 ` Linus Torvalds
2016-10-04 8:02 ` Greg KH
2016-10-04 9:32 ` Johannes Weiner
2016-10-05 1:21 ` Linus Torvalds
2016-10-05 9:25 ` Johannes Weiner
2016-10-05 9:31 ` Johannes Weiner
2016-10-05 10:40 ` Jan Kara
2016-10-05 16:10 ` Linus Torvalds
2016-10-05 17:00 ` [PATCH] checkpatch: extend BUG warning Joe Perches
2016-10-05 17:07 ` Linus Torvalds
2016-10-05 2:43 ` BUG_ON() in workingset_node_shadows_dec() triggers Paul Gortmaker
2016-10-05 3:29 ` Linus Torvalds
2016-10-05 5:44 ` Willy Tarreau
2016-10-05 15:52 ` Linus Torvalds
2016-10-05 19:06 ` Willy Tarreau
2016-10-05 19:18 ` Linus Torvalds
2016-10-05 21:09 ` Willy Tarreau [this message]
2016-10-05 21:14 ` Kees Cook
2016-10-05 21:46 ` Linus Torvalds
2016-10-05 22:17 ` Kees Cook
2016-10-05 22:29 ` Linus Torvalds
2016-10-06 22:07 ` Kees Cook
2016-10-06 22:29 ` Linus Torvalds
2016-10-06 23:05 ` Kees Cook
2016-10-06 23:59 ` Linus Torvalds
2016-10-07 5:48 ` Willy Tarreau
2016-10-07 17:16 ` Kees Cook
2016-10-07 17:21 ` Linus Torvalds
2016-10-07 17:33 ` Kees Cook
2016-10-07 18:26 ` Willy Tarreau
2016-10-06 1:59 ` Dave Chinner
2016-10-06 2:12 ` Linus Torvalds
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