lkml.org 
[lkml]   [2003]   [Oct]   [16]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateWed, 15 Oct 2003 21:51:34 -0700
From"David S. Miller" <>
SubjectRe: [SCSI] Set max_phys_segments to sg_tablesize
On Wed, 15 Oct 2003 15:37:22 +0300
<mika.penttila@kolumbus.fi> wrote:

> >It does matter if the driver can't cope with it.
> 
> But this fix may hurt performance with well behaving drivers in
> iommu systems. It's better to fix the broken drivers I think. 

That's absolutely correct.

If you add Herbert's change, you will effectively turn off all
of the IOMMU coalescing benefits we designed into the block layer.
Please don't apply it, fix the broken drivers instead.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:49    [from the cache]
©2003-2008