lkml.org 
[lkml]   [2007]   [Jun]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Change in default vm_dirty_ratio


On Thu, 21 Jun 2007, Matt Mackall wrote:
>
> Perhaps we want to throw some sliding window algorithms at it. We can
> bound requests and total I/O and if requests get retired too slowly we
> can shrink the windows. Alternately, we can grow the window if we're
> retiring things within our desired timeframe.

I suspect that would tend to be a good way to go. But it almost certainly
has to be per-device, which implies that somebody would have to do some
major coding/testing on this..

The vm_dirty_ratio thing is a global value, and I think we need that
regardless (for the independent issue of memory deadlocks etc), but if we
*additionally* had a per-device throttle that was based on some kind of
adaptive thing, we could probably raise the global (hard) vm_dirty_ratio a
lot.

Linus
-
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: 2007-06-22 01:11    [W:1.206 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site