On Tue, Nov 20, 2007 at 06:51:14AM +1100, Benjamin Herrenschmidt wrote:
>
> On Mon, 2007-11-19 at 00:38 -0800, David Miller wrote:
> > From: Benjamin Herrenschmidt <[email protected]>
> > Date: Mon, 19 Nov 2007 16:35:23 +1100
> >
> > > I'm not sure what is the best way to fix that. Internally, I've done
> > > some test whacking some ____cacheline_aligned in the scsi_cmnd data
> > > structure to verify I no longer get random SLAB corruption when using my
> > > USB but that significantly bloats the size of the structure on archs
> > > such as ppc64 that don't need it and have a large cache line size.
> > >
> > > Unfortunately, I don't think there's any existing Kconfig symbol or arch
> > > provided #define to tell us that we are on a non-coherent arch afaik
> > > that could be used to make that conditional.
> > >
> > > Another option would be to kmalloc the buffer (wasn't it the case before
> > > btw ?) but I suppose some people will scream at the idea due to how the
> > > command pools are done...
> >
> > You could make a ____dma_cacheline_aligned and use that.
> > It seems pretty reasonable.
>
> I was thinking about that. What archs would need it ? arm, mips, what
> else ?
older parisc
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessary a
good idea. [ RFC1925, 2.3 ]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
