lkml.org 
[lkml]   [2010]   [Jun]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH 0/6] Do not call ->writepage[s] from direct reclaim and use a_ops->writepages() where possible
On Wed, Jun 16, 2010 at 12:59:54PM -0400, Rik van Riel wrote:
> __GFP_IO can wait for filesystem activity

Hmm I think it's for submitting I/O, not about waiting. At some point
you may not enter the FS because of the FS locks you already hold
(like within writepage itself), but you can still submit I/O through
blkdev layer.

> __GFP_FS can kick off new filesystem activity

Yes that's for dcache/icache/writepage or anything that can reenter
the fs locks and deadlock IIRC.


\
 
 \ /
  Last update: 2010-06-16 19:07    [W:6.568 / U:0.556 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site