lkml.org 
[lkml]   [2004]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Possibly wrong BIO usage in ide_multwrite
On Mon, Jan 05 2004, Bartlomiej Zolnierkiewicz wrote:
> On Monday 05 of January 2004 17:49, Jens Axboe wrote:
> > On Mon, Jan 05 2004, Bartlomiej Zolnierkiewicz wrote:
> > > > calling end_request with a null sector count, ide_end_request will then
> > > > take hard_nr_sectors which will end the whole request even if only one
> > > > bio was finished, huh? Am I missing something here?
> > >
> > > No, it is used mainly to fail requests.
> > >
> > > This hack should be later removed with care
> > > (there is some strange comment about locking).
> >
> > IIRC, it's due to it not always being safe to inspect rq state outside
> > of ide_lock. So that makes 0 a magic value that just means 'end the
> > first chunk' for ide_end_request().
>
> Why/when it is not safe to do?

You would need to read hwgroup->rq.

--
Jens Axboe

-
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 13:59    [W:1.408 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site