lkml.org 
[lkml]   [2005]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH][5/?] count writeback pages in nr_scanned
On Thu, Jan 06, 2005 at 04:06:34PM +1100, Nick Piggin wrote:
> Yeah I guess that isn't a bad idea.
>
> Doesn't that have the theoretical problem of slowing down reclaim
> of dirty pages backed by fast devices when you have slow devices
> writing?

Andrew just suggested to wait on any random page. That's a minor
modification to that logic. Effectively it's stupid to wait on a
specific random page, when we can wait wait on _any_ random page to
complete the writeback I/O.

With locking done right by setting the state to uninterruptible and
then registering in the new waitqueue when we know at least one page has
PG_writeback set, we can then drop the HZ anti-deadlock hacks too.
-
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 14:09    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site