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Re: [Xen-devel] Re: [patch 13/26] Xen-paravirt_ops: Consistently wrap paravirt ops callsites to make them patchable
- To: Andi Kleen <ak@xxxxxxx>
- From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 20 Mar 2007 16:51:19 -0700 (PDT)
- Cc: jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, David Miller <davem@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, jbeulich@xxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, chrisw@xxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxx, "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>, anthony@xxxxxxxxxxxxx, mingo@xxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 21 Mar 2007 02:27:18 -0700
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
On Tue, 20 Mar 2007, Andi Kleen wrote:
>
> Linus is worried about the unwinder crashing -- that wouldn't help with that.
And to make it clear: this is not a theoretical worry. It happened many
times over the months the unwinder was in.
It was supposed to help debugging, but it made bugs that *would* have been
nicely debuggable without it into nightmares. So the only reason for it
existing in the first place was actually the thing that made it not work.
Linus
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