Re: [PATCH] perf record: Delete file if a failure occurs writing theperf data file

[Peter Zijlstra]

On Tue, Nov 12, 2013 at 07:51:16AM -0700, David Ahern wrote:
> > From man mmap:
> >        SIGBUS Attempted access to a portion of the buffer that
> >        does not correspond  to  the  file (for  example, beyond
> >        the end of the file, ...

SIGBUS is basically the std fail for any fault; there's a ton more
reasons than listed in that manpage.

Failing to dirty a page due to -ENOSPACE is one reason we'll
trigger SIGBUS -- as you already found in that memcpy to mmap() instead
of write() patch.


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