The patch titled
Subject: zram: clear disk io accounting when reset zram device
has been added to the -mm tree. Its filename is
zram-clear-disk-io-accounting-when-reset-zram-device.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/zram-clear-disk-io-accounting-when-reset-zram-device.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/zram-clear-disk-io-accounting-when-reset-zram-device.patch
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------------------------------------------------------
From: Weijie Yang <weijie.yang@xxxxxxxxxxx>
Subject: zram: clear disk io accounting when reset zram device
Clear zram disk io accounting when resetting the zram device. Otherwise
the residual io accounting stat will affect the diskstat in the next zram
active cycle.
Signed-off-by: Weijie Yang <weijie.yang@xxxxxxxxxxx>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Acked-by: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN drivers/block/zram/zram_drv.c~zram-clear-disk-io-accounting-when-reset-zram-device drivers/block/zram/zram_drv.c
--- a/drivers/block/zram/zram_drv.c~zram-clear-disk-io-accounting-when-reset-zram-device
+++ a/drivers/block/zram/zram_drv.c
@@ -805,7 +805,9 @@ static void zram_reset_device(struct zra
memset(&zram->stats, 0, sizeof(zram->stats));
zram->disksize = 0;
zram->max_comp_streams = 1;
+
set_capacity(zram->disk, 0);
+ part_stat_set_all(&zram->disk->part0, 0);
up_write(&zram->init_lock);
/* I/O operation under all of CPU are done so let's free */
_
Patches currently in -mm which might be from weijie.yang@xxxxxxxxxxx are
zram-clear-disk-io-accounting-when-reset-zram-device.patch
mm-page_isolation-check-pfn-validity-before-access.patch
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