From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 20 May 2007 18:12:00 +0200 From: Folkert van Heusden Subject: Re: signals logged / [RFC] log out-of-virtual-memory events Message-ID: <20070520161159.GD22452@vanheusden.com> References: <464C81B5.8070101@users.sourceforge.net> <464C9D82.60105@redhat.com> <200705181347.14256.ak@suse.de> <20070520001418.GJ14578@vanheusden.com> <464FC6AA.2060805@cosmosbay.com> <20070520112111.GN14578@vanheusden.com> <20070520090809.4f42d71d@freepuppy> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20070520090809.4f42d71d@freepuppy> Sender: owner-linux-mm@kvack.org Return-Path: To: Stephen Hemminger Cc: Eric Dumazet , Jan Engelhardt , Andi Kleen , Rik van Riel , righiandr@users.sourceforge.net, LKML , linux-mm@kvack.org List-ID: > > > >>>>I do not see such on i386, so why for x86_64? > > > >>>So that you know that one of your programs crashed. That's a feature. > > > >>This feature could be handy for i386 too. > > > >Since 2.6.18.2 I use this patch. With 2.6.21.1 it still applies altough > > > >with a small offsets. Works like a charm. > > > > > > > >Signed-off by: Folkert van Heusden > > > >--- linux-2.6.18.2/kernel/signal.c 2006-11-04 02:33:58.000000000 +0100 > > > >+++ linux-2.6.18.2.new/kernel/signal.c 2006-11-17 15:59:13.000000000 +0100 > > ... > > > >+ sig, t -> pid, t -> uid, t -> gid, t -> comm); > > > > > > Please check line 219 of Documentation/CodingStyle, Section 3.1: Spaces > > > and no space around the '.' and "->" structure member operators. > > New version without the spaces around '->' and a nice 'unlikely' added. > > Signed-off by: Folkert van Heusden > > --- linux-2.6.18.2/kernel/signal.c 2006-11-04 02:33:58.000000000 +0100 > > +++ linux-2.6.18.2.new/kernel/signal.c 2006-11-17 15:59:13.000000000 +0100 > > @@ -706,6 +706,15 @@ > > struct sigqueue * q = NULL; > > int ret = 0; > > > > + if (unlikely(sig == SIGQUIT || sig == SIGILL || sig == SIGTRAP || > > + sig == SIGABRT || sig == SIGBUS || sig == SIGFPE || > > + sig == SIGSEGV || sig == SIGXCPU || sig == SIGXFSZ || > > + sig == SIGSYS || sig == SIGSTKFLT)) > > + { > > + printk(KERN_WARNING "Sig %d send to %d owned by %d.%d (%s)\n", > > + sig, t->pid, t->uid, t->gid, t->comm); > > + } > > + > > /* > > * fast-pathed signals for kernel-internal things like SIGSTOP > > * or SIGKILL. > > Would turning that into a switch() generate better code. Doubt it: in the worst case you still nee to check for each possibility. Furthermore a.f.a.i.k. with switch you cannot do 'unlinkely()'. Folkert van Heusden -- MultiTail er et flexible tool for a kontrolere Logfiles og commandoer. Med filtrer, farger, sammenforinger, forskeliger ansikter etc. http://www.vanheusden.com/multitail/ ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org