Performance testing w BackupExec, comments requested.

Jeremy Allison jra at
Wed Jan 25 20:20:01 GMT 2006

On Wed, Jan 25, 2006 at 03:18:15PM -0500, derrell at wrote:
> Jeremy Allison <jra at> writes:
> >> >Now I realize this is not a real world test, and it's not a very good
> >> >benchmark, but why not turn sendfile back on for kernels later then
> >> >2.6.15?
> >
> > Good point ! The problem is how do we know what kernel we're
> > running on.....
> Here's one option:
> The uname(2) system call conforms to SVr4, SVID, POSIX, and X/OPEN but is not
> available in BSD4.3.  If this call exists (configure test) and the "sysname"
> field is "Linux" and the "release" field, parsed from a string like
> 2.6.8-2-686, shows the release to be greater than 2.6.15, then enable else
> disable.

Ugh. That's *horrible* :-). Tempting though.... :-).

No, this really is something vendors should address (IMHO).


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