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GFS2: Make writeback more responsive to system conditions

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This patch adds writeback_control to writing back the AIL
list. This means that we can then take advantage of the
information we get in ->write_inode() in order to set off
some pre-emptive writeback.

In addition, the AIL code is cleaned up a bit to make it
a bit simpler to understand.

There is still more which can usefully be done in this area,
but this is a good start at least.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse
2011-04-18 14:18:09 +01:00
parent f42ab08529
commit 4667a0ec32
8 changed files with 102 additions and 94 deletions
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2
fs/gfs2/inode.h
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@ -102,7 +102,7 @@ extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
u64 *no_formal_ino,
unsigned int blktype);
extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int nonblock);
extern int gfs2_inode_refresh(struct gfs2_inode *ip);