Re: i386-show-unhandled-signals-v3

[Andrew Morton <akpm@linux-foundation.org>]

On Wed, 25 Jul 2007 16:40:06 -0700
masouds@google.com (Masoud Asgharifard Sharbiani) wrote:

> > Look: if there's a way in which an unprivileged user can trigger a printk
> > we fix it, end of story.  I don't know why this even slightly
> > controversial.
> > 
> 
> Fair enough. Here it is:

My favourite words.

> ---------------
> Hello,
> This patch makes the i386 behave the same way that x86_64 does when a
> segfault happens. A line gets printed to the kernel log so that tools
> that need to check for failures can behave more uniformly between
> different kernels. Like x86_64, it can be disabled by setting
> debug.show_unhandled_signals sysctl variable to 0 (or by doing
> echo 0 > /proc/sys/debug/show_unhandled_signals)

Do we really need the ratelimiting?  If the admin turns this on then he's
presumably prepared for the consequences.

I guess "yes", as people (even distros) are likely to turn this on and
forget about it.

The patch is larger than I expected, ho hum.