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bcache: Track dirty data by stripe

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To make background writeback aware of raid5/6 stripes, we first need to
track the amount of dirty data within each stripe - we do this by
breaking up the existing sectors_dirty into per stripe atomic_ts

Signed-off-by: Kent Overstreet <koverstreet@google.com>
This commit is contained in:
Kent Overstreet
2013-06-05 06:21:07 -07:00
parent 444fc0b6b1
commit 279afbad4e
7 changed files with 105 additions and 26 deletions
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5
drivers/md/bcache/sysfs.c
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@@ -9,6 +9,7 @@
#include "sysfs.h"
#include "btree.h"
#include "request.h"
#include "writeback.h"
#include <linux/blkdev.h>
#include <linux/sort.h>
@@ -128,7 +129,7 @@ SHOW(__bch_cached_dev)
char derivative[20];
char target[20];
bch_hprint(dirty,
atomic_long_read(&dc->disk.sectors_dirty) << 9);
bcache_dev_sectors_dirty(&dc->disk) << 9);
bch_hprint(derivative, dc->writeback_rate_derivative << 9);
bch_hprint(target, dc->writeback_rate_target << 9);
@@ -144,7 +145,7 @@ SHOW(__bch_cached_dev)
}
sysfs_hprint(dirty_data,
atomic_long_read(&dc->disk.sectors_dirty) << 9);
bcache_dev_sectors_dirty(&dc->disk) << 9);
var_printf(sequential_merge, "%i");
var_hprint(sequential_cutoff);