lkml.org 
[lkml]   [2010]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/3] bdi: Use parent filesystem BDI for inodes not capable of writeback
Given that we only need the per-mapping one for the bdev fs what about
doing:

/*
* Return the writeback-relevant backing device for this inode.
*
* For a normal filesystem this must always be the bdi hanging off the
* superblock, given that we only expect one bdi per filesystems in
* the per-superblock sync functions. But the block device special
* filesystem requires a quick given that it contains the internal
* I/O inodes for block devices on a single superblock. This works
* because the block deevice filesystem inodes are never user visible
* and we will never do a per-superblock sync on it.
*/
static struct backing_dev_info *inode_to_bdi(struct inode *inode)
{
if (inode->i_sb == blockdev_superblock)
return inode->i_mapping->backing_dev_info;
return inode->i_sb->s_bdi;
}

that also avoids the need for doing the bdi capabilities audit ASAP.


\
 
 \ /
  Last update: 2010-07-29 10:15    [W:0.060 / U:0.352 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site