redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

Btrfs: set ioprio of scrub readahead to idle 

Reduce ioprio class of scrub readahead threads to idle priority.
This setting is fixed. This priority has shown the best performance
during all measurements.

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
wifi-calibration
Stefan Behrens 2012-02-03 11:20:04 +01:00 committed by Josef Bacik
parent 5bdbeb2187
commit 3d136a1131
2 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/btrfs/ctree.h
View File

@ -173,6 +173,9 @@ static int btrfs_csum_sizes[] = { 4, 0 };
#define BTRFS_FT_XATTR 8
#define BTRFS_FT_MAX 9
/* ioprio of readahead is set to idle */
#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
/*
* The key defines the order in the tree, and so it also defines (optimal)
* block layout.

5
fs/btrfs/reada.c
View File

@ -718,13 +718,18 @@ static void reada_start_machine_worker(struct btrfs_work *work)
{
struct reada_machine_work *rmw;
struct btrfs_fs_info *fs_info;
int old_ioprio;
rmw = container_of(work, struct reada_machine_work, work);
fs_info = rmw->fs_info;
kfree(rmw);
old_ioprio = IOPRIO_PRIO_VALUE(task_nice_ioclass(current),
task_nice_ioprio(current));
set_task_ioprio(current, BTRFS_IOPRIO_READA);
__reada_start_machine(fs_info);
set_task_ioprio(current, old_ioprio);
}
static void __reada_start_machine(struct btrfs_fs_info *fs_info)