lkml.org 
[lkml]   [2009]   [Sep]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC][PATCH 5/7] writeback: use 64MB MAX_WRITEBACK_PAGES
On Wed, Sep 09, 2009 at 10:51:46PM +0800, Wu Fengguang wrote:
> + * The maximum number of pages to writeout in a single periodic/background
> + * writeback operation. 64MB means I_SYNC may be hold for up to 1 second.
> + * This is not a big problem since we normally do kind of trylock on I_SYNC
> + * for non-data-integrity writes. Userspace tasks doing throttled writeback
> + * do not use this value.

What's your justification for using 64MB? Where are you getting 1
second from? On a fast RAID array 64MB can be written in much less
than 1 second.

More generally, I assume your patches conflict with Jens' per-bdi patches?

- Ted


\
 
 \ /
  Last update: 2009-09-10 01:33    [W:0.098 / U:0.140 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site