On Wed, 13 Jul 2022, Mikulas Patocka wrote:
> This commit enables writeback limit by default. It is set to 1GiB or 1/16
The limit is really 256MiB, not 1GiB. I think that 1GiB is too much.
Mikulas
> of total system memory, whichever is smaller.
>
> Signed-off-by: Mikulas Patocka <[email protected]>
>
> ---
> drivers/md/dm-writecache.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Index: linux-2.6/drivers/md/dm-writecache.c
> ===================================================================
> --- linux-2.6.orig/drivers/md/dm-writecache.c 2022-07-13 13:07:52.000000000
> +0200
> +++ linux-2.6/drivers/md/dm-writecache.c 2022-07-13 13:08:19.000000000
> +0200
> @@ -22,7 +22,7 @@
>
> #define HIGH_WATERMARK 50
> #define LOW_WATERMARK 45
> -#define MAX_WRITEBACK_JOBS 0
> +#define MAX_WRITEBACK_JOBS min(0x10000000 / PAGE_SIZE,
> totalram_pages() / 16)
> #define ENDIO_LATENCY 16
> #define WRITEBACK_LATENCY 64
> #define AUTOCOMMIT_BLOCKS_SSD 65536
>
--
dm-devel mailing list
[email protected]
https://listman.redhat.com/mailman/listinfo/dm-devel
