The patch titled
md: add a ->congested_fn function for raid5/6
has been removed from the -mm tree. Its filename is
md-add-a-congested_fn-function-for-raid5-6.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: md: add a ->congested_fn function for raid5/6
From: NeilBrown <neilb@xxxxxxx>
This is very different from other raid levels and all requests go through a
'stripe cache', and it has congestion management already.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/raid5.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff -puN drivers/md/raid5.c~md-add-a-congested_fn-function-for-raid5-6 drivers/md/raid5.c
--- a/drivers/md/raid5.c~md-add-a-congested_fn-function-for-raid5-6
+++ a/drivers/md/raid5.c
@@ -2593,6 +2593,24 @@ static int raid5_issue_flush(request_que
return ret;
}
+static int raid5_congested(void *data, int bits)
+{
+ mddev_t *mddev = data;
+ raid5_conf_t *conf = mddev_to_conf(mddev);
+
+ /* No difference between reads and writes. Just check
+ * how busy the stripe_cache is
+ */
+ if (conf->inactive_blocked)
+ return 1;
+ if (conf->quiesce)
+ return 1;
+ if (list_empty_careful(&conf->inactive_list))
+ return 1;
+
+ return 0;
+}
+
static int make_request(request_queue_t *q, struct bio * bi)
{
mddev_t *mddev = q->queuedata;
@@ -3296,6 +3314,9 @@ static int run(mddev_t *mddev)
mddev->queue->unplug_fn = raid5_unplug_device;
mddev->queue->issue_flush_fn = raid5_issue_flush;
+ mddev->queue->backing_dev_info.congested_fn = raid5_congested;
+ mddev->queue->backing_dev_info.congested_data = mddev;
+
mddev->array_size = mddev->size * (conf->previous_raid_disks -
conf->max_degraded);
_
Patches currently in -mm which might be from neilb@xxxxxxx are
origin.patch
vfs-destroy-the-dentries-contributed-by-a-superblock-on-unmounting.patch
knfsd-add-nfs-export-support-to-tmpfs.patch
knfsd-add-nfs-export-support-to-tmpfs-fixes.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
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