* Cleancache [PATCH 5/7] (was Transcendent Memory): btrfs hooks
@ 2010-04-22 13:29 Dan Magenheimer
0 siblings, 0 replies; 2+ messages in thread
From: Dan Magenheimer @ 2010-04-22 13:29 UTC (permalink / raw)
To: chris.mason, viro, akpm, adilger, tytso, mfasheh, joel.becker,
matthew, linux-btrfs, linux-kernel, linux-fsdevel, linux-ext4,
ocfs2-devel, linux-mm, ngupta, jeremy, JBeulich, kurt.hackel,
npiggin, dave.mccracken, riel
(Sorry for resend... Mail server DNS problems sending to some recipients)
Cleancache [PATCH 5/7] (was Transcendent Memory): btrfs hooks
Filesystems must explicitly enable cleancache. Also, btrfs
uses its own readpage which must be hooked.
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat:
extent_io.c | 9 +++++++++
super.c | 2 ++
2 files changed, 11 insertions(+)
--- linux-2.6.34-rc5/fs/btrfs/super.c 2010-04-19 17:29:56.000000000 -0600
+++ linux-2.6.34-rc5-cleancache/fs/btrfs/super.c 2010-04-21 10:08:39.000000000 -0600
@@ -39,6 +39,7 @@
#include <linux/miscdevice.h>
#include <linux/magic.h>
#include <linux/slab.h>
+#include <linux/cleancache.h>
#include "compat.h"
#include "ctree.h"
#include "disk-io.h"
@@ -477,6 +478,7 @@ static int btrfs_fill_super(struct super
sb->s_root = root_dentry;
save_mount_options(sb, data);
+ sb->cleancache_poolid = cleancache_init_fs(PAGE_SIZE);
return 0;
fail_close:
--- linux-2.6.34-rc5/fs/btrfs/extent_io.c 2010-04-19 17:29:56.000000000 -0600
+++ linux-2.6.34-rc5-cleancache/fs/btrfs/extent_io.c 2010-04-21 10:07:31.000000000 -0600
@@ -10,6 +10,7 @@
#include <linux/swap.h>
#include <linux/writeback.h>
#include <linux/pagevec.h>
+#include <linux/cleancache.h>
#include "extent_io.h"
#include "extent_map.h"
#include "compat.h"
@@ -2030,6 +2031,13 @@ static int __extent_read_full_page(struc
set_page_extent_mapped(page);
+ if (!PageUptodate(page)) {
+ if (cleancache_get_page(page) == 1) {
+ BUG_ON(blocksize != PAGE_SIZE);
+ goto out;
+ }
+ }
+
end = page_end;
lock_extent(tree, start, end, GFP_NOFS);
@@ -2146,6 +2154,7 @@ static int __extent_read_full_page(struc
cur = cur + iosize;
page_offset += iosize;
}
+out:
if (!nr) {
if (!PageError(page))
SetPageUptodate(page);
--
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Cleancache [PATCH 5/7] (was Transcendent Memory): btrfs hooks
@ 2010-04-22 12:15 Dan Magenheimer
0 siblings, 0 replies; 2+ messages in thread
From: Dan Magenheimer @ 2010-04-22 12:15 UTC (permalink / raw)
To: adilger, akpm, chris.mason, dave.mccracken, JBeulich, jeremy,
joel.becker, kurt.hackel, linux-btrfs, linux-ext4, linux-fsdevel,
linux-kernel, linux-mm, matthew, mfasheh, ngupta, npiggin,
ocfs2-devel, riel, tytso, viro
Cleancache [PATCH 5/7] (was Transcendent Memory): btrfs hooks
Filesystems must explicitly enable cleancache. Also, btrfs
uses its own readpage which must be hooked.
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat:
extent_io.c | 9 +++++++++
super.c | 2 ++
2 files changed, 11 insertions(+)
--- linux-2.6.34-rc5/fs/btrfs/super.c 2010-04-19 17:29:56.000000000 -0600
+++ linux-2.6.34-rc5-cleancache/fs/btrfs/super.c 2010-04-21 10:08:39.000000000 -0600
@@ -39,6 +39,7 @@
#include <linux/miscdevice.h>
#include <linux/magic.h>
#include <linux/slab.h>
+#include <linux/cleancache.h>
#include "compat.h"
#include "ctree.h"
#include "disk-io.h"
@@ -477,6 +478,7 @@ static int btrfs_fill_super(struct super
sb->s_root = root_dentry;
save_mount_options(sb, data);
+ sb->cleancache_poolid = cleancache_init_fs(PAGE_SIZE);
return 0;
fail_close:
--- linux-2.6.34-rc5/fs/btrfs/extent_io.c 2010-04-19 17:29:56.000000000 -0600
+++ linux-2.6.34-rc5-cleancache/fs/btrfs/extent_io.c 2010-04-21 10:07:31.000000000 -0600
@@ -10,6 +10,7 @@
#include <linux/swap.h>
#include <linux/writeback.h>
#include <linux/pagevec.h>
+#include <linux/cleancache.h>
#include "extent_io.h"
#include "extent_map.h"
#include "compat.h"
@@ -2030,6 +2031,13 @@ static int __extent_read_full_page(struc
set_page_extent_mapped(page);
+ if (!PageUptodate(page)) {
+ if (cleancache_get_page(page) == 1) {
+ BUG_ON(blocksize != PAGE_SIZE);
+ goto out;
+ }
+ }
+
end = page_end;
lock_extent(tree, start, end, GFP_NOFS);
@@ -2146,6 +2154,7 @@ static int __extent_read_full_page(struc
cur = cur + iosize;
page_offset += iosize;
}
+out:
if (!nr) {
if (!PageError(page))
SetPageUptodate(page);
--
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