Re: How to debug VM trouble?
Re: How to debug VM trouble?
- Subject: Re: How to debug VM trouble?
- From: Michael Smith <email@hidden>
- Date: Thu, 24 Jan 2008 15:47:01 -0800
On Jan 24, 2008, at 1:31 PM, Michael Crawford wrote:
We were suspecting for a while that the bug was in the OS X kernel.
We're going to do whatever it takes to find the real source of
trouble. If it turns out that we later conclude that it is in fact in
Apple's code, I'll be sure to file a bug report and post the number to
this thread.
Michael,
If you have a reduced version of your tool that you can attach to the
bug, I'm sure that will help. As a general rule, kernel memory
starvation should not result in system calls that could be deferred
instead returning errors, although per Rick's thread a while back on
this list it is a nontrivial thing to get the right behaviour in the
face of the heavy layering within the kernel.
What I'm saying is that the miscompares you're seeing may well be a
tool bug, but the filesystem operations returning ENOMEM feels to me
like a kernel bug, and you should file accordingly.
= Mike
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