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| author | Matthew Garrett <mjg@redhat.com> | 2010-04-06 14:25:14 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2010-04-06 14:25:14 +0200 |
| commit | 31373d09da5b7fe21fe6f781e92bd534a3495f00 (patch) | |
| tree | 38cd9896cfc6ce106a03431658a9b98a09129034 /include/linux/backing-dev.h | |
| parent | 9195291e5f05e01d67f9a09c756b8aca8f009089 (diff) | |
| download | kernel_samsung_tuna-31373d09da5b7fe21fe6f781e92bd534a3495f00.zip kernel_samsung_tuna-31373d09da5b7fe21fe6f781e92bd534a3495f00.tar.gz kernel_samsung_tuna-31373d09da5b7fe21fe6f781e92bd534a3495f00.tar.bz2 | |
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.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index fcbc26a..2742e1a 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; |