lkml.org 
[lkml]   [2006]   [Jun]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Memory corruption in 8390.c ?
From
Date
Ar Mer, 2006-06-21 am 10:23 -0700, ysgrifennodd Ben Pfaff:
> > + memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */
> > + memcpy(buf, data, ETH_ZLEN);
>
> Is this really correct? It zeros out ETH_ZLEN bytes only to
> immediately copy over all of them again.

When I did it originally I tested with rdtsc and its actually quicker to
let it build the static memset the copy data over it than to do the
extra maths and the variable length loop.

Hence the comment


-
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: 2006-06-21 19:41    [from the cache]
©2003-2011 Jasper Spaans