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authorMatthew Garrett <mjg@redhat.com>2010-04-06 16:25:14 +0400
committerJens Axboe <jens.axboe@oracle.com>2010-04-06 16:25:14 +0400
commit31373d09da5b7fe21fe6f781e92bd534a3495f00 (patch)
tree38cd9896cfc6ce106a03431658a9b98a09129034 /include/linux/backing-dev.h
parent9195291e5f05e01d67f9a09c756b8aca8f009089 (diff)
downloadlinux-31373d09da5b7fe21fe6f781e92bd534a3495f00.tar.xz
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/backing-dev.h')
-rw-r--r--include/linux/backing-dev.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index fcbc26af00e4..2742e1adfc30 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;