lkml.org 
[lkml]   [2001]   [Nov]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] lp.c, eexpress.c jiffies cleanup
On Nov 06, 2001  21:37 +0000, Philip Blundell wrote:
> In message <20011106141521.R3957@lynx.no>, Andreas Dilger writes:
> >I agree. It seems very ugly. I looked at a few drivers which loop 1 or 2
> >jiffies, but to busy-loop for 1/10th of a second, or even 20 seconds
> >is terribly bad.
>
> Those timeouts are only a last resort. If the card is working properly
> the loop will terminate much sooner.

Well, if the card is working properly, then you don't need the timeouts
at all. Clearly, if they are needed, then either they should be more
realistic in length (1/10th isn't bad, but 20 seconds?), or after a
"reasonable" short timeout, it should sleep for an interval and check
afterwards. Sucking all CPU for 20 seconds and locking everything else
out isn't an acceptable method IMHO.

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/

-
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 13:12    [W:0.087 / U:0.552 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site