Re: Patch for Retry based AIO-DIO (Was AIO and DIO testing on 2.6.0-test7-mm1)

[Dan Kegel]

Andrew Morton wrote:
> Suparna Bhattacharya <suparna@xxxxxxxxxx> wrote:
>
> > It turns out that backing out gcc-Os.patch (on RH 9) or switching 
> > to a system with an older compiler version made those errors go away.
>
>
> Ho hum, so we have our answer.
>
> Adrian, how do you feel about slotting this under CONFIG_EMBEDDED?

I dunno about Adrian, but I'd rest easier either way
if we knew which optimization in -Os causes the problem,
and whether this is a compiler bug.

http://gcc.gnu.org/onlinedocs/gcc-3.3.1/gcc/Optimize-Options.html#Optimize%20Options
has a nice list of the optimizations performed by -O2, but
the list for -Os is a bit fuzzy, darn it.
- Dan

p.s. For the curious, the url of that patch seems to be
ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.0-test8/2.6.0-test8-mm1/broken-out/gcc-Os.patch

--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045

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