diff options
| author | Jeff Moyer <jmoyer@redhat.com> | 2012-12-05 20:17:21 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-12-05 20:17:21 +0100 |
| commit | 8fa72d234da9b6b473bbb1f74d533663e4996e6b (patch) | |
| tree | 536b8d2cf5aa3f0baee3aa0d89e602733be3df56 /include | |
| parent | c304a51bf42a7ce48f430a371e1213472c89e13d (diff) | |
bdi: add a user-tunable cpu_list for the bdi flusher threads
In realtime environments, it may be desirable to keep the per-bdi
flusher threads from running on certain cpus. This patch adds a
cpu_list file to /sys/class/bdi/* to enable this. The default is to tie
the flusher threads to the same numa node as the backing device (though
I could be convinced to make it a mask of all cpus to avoid a change in
behaviour).
Thanks to Jeremy Eder for the original idea.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/backing-dev.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 2a9a9abc912..238521a1984 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -18,6 +18,7 @@ #include <linux/writeback.h> #include <linux/atomic.h> #include <linux/sysctl.h> +#include <linux/mutex.h> struct page; struct device; @@ -105,6 +106,9 @@ struct backing_dev_info { struct timer_list laptop_mode_wb_timer; + cpumask_t *flusher_cpumask; /* used for writeback thread scheduling */ + struct mutex flusher_cpumask_lock; + #ifdef CONFIG_DEBUG_FS struct dentry *debug_dir; struct dentry *debug_stats; |