Messages in this thread | | | Date | Sun, 13 Jul 2008 11:38:05 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH] x86_64: fix delayed signals |
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Linus Torvalds wrote: > > On Sat, 12 Jul 2008, Andi Kleen wrote: >> Linus, the fact that is not explained by your theory is why >> Ctrl-Z+kill works but Ctrl-C doesn't. > > Umm. Read the reports more carefully. Many of the complaints are about ^Z > too.
At least the original report was about Ctrl-C only versus Ctrl-Z.
I see the problem regularly myself that Ctrl-C doesn't work, but Ctrl-Z+kill does (although I unfortunately cannot reproduce it on demand). But it was with programs who shouldn't catch Ctrl-C, like find. I confirmed with ltrace that at least my version of find doesn't catch any signals.
Take the original report for example:
http://marc.info/?l=linux-kernel&m=121464952615807&w=2
It also had trouble interrupting find:
$ find / >/dev/null find: `/boot/lost+found': Permission denied ^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C
but Ctrl-Z+kill worked immediately.
> The reason? It's quite common to catch ^C in order to do cleanup.
Yes I understand that, but I don't think it's the case here.
I'm afraid it's more a "has a simple explanation that is wrong" case here.
Or we might be talking about multiple different bugs.
-Andi
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