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authorMatthew Garrett <mjg@redhat.com>2010-04-06 14:25:14 +0200
committerJens Axboe <jens.axboe@oracle.com>2010-04-06 14:25:14 +0200
commit31373d09da5b7fe21fe6f781e92bd534a3495f00 (patch)
tree38cd9896cfc6ce106a03431658a9b98a09129034 /include/linux
parent9195291e5f05e01d67f9a09c756b8aca8f009089 (diff)
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laptop-mode: Make flushes per-device
One of the features of laptop-mode is that it forces a writeout of dirty pages if something else triggers a physical read or write from a device. The current implementation flushes pages on all devices, rather than only the one that triggered the flush. This patch alters the behaviour so that only the recently accessed block device is flushed, preventing other disks being spun up for no terribly good reason. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/backing-dev.h3
-rw-r--r--include/linux/writeback.h4
2 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index fcbc26af00e..2742e1adfc3 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/sched.h>
+#include <linux/timer.h>
#include <linux/writeback.h>
#include <asm/atomic.h>
@@ -88,6 +89,8 @@ struct backing_dev_info {
struct device *dev;
+ struct timer_list laptop_mode_wb_timer;
+
#ifdef CONFIG_DEBUG_FS
struct dentry *debug_dir;
struct dentry *debug_stats;
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 36520ded3e0..eb38a2c645f 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -96,8 +96,10 @@ static inline void inode_sync_wait(struct inode *inode)
/*
* mm/page-writeback.c
*/
-void laptop_io_completion(void);
+void laptop_io_completion(struct backing_dev_info *info);
void laptop_sync_completion(void);
+void laptop_mode_sync(struct work_struct *work);
+void laptop_mode_timer_fn(unsigned long data);
void throttle_vm_writeout(gfp_t gfp_mask);
/* These are exported to sysctl. */