On Tue, Dec 02, 2014 at 09:00:17AM -0500, Mike Snitzer wrote:Great Thanks!
On Tue, Dec 02 2014 at 3:43am -0500,
zhangxiao <xiao.zhang@xxxxxxxxxxxxx> wrote:
See drivers/md/dm-bufio.c as below:
51 * Buffer hash
53 #define DM_BUFIO_HASH_BITS 20
54 #define DM_BUFIO_HASH(block) \
55 ((((block) >> DM_BUFIO_HASH_BITS) ^ (block)) & \
56 ((1 << DM_BUFIO_HASH_BITS) - 1))
"drivers/md/dm-bufio.c" 1854L, 45375C
DM_BUFIO_HASH_BITS was defined as 20 and it maybe not fit for some
use case with limited resources. Do we have any plan to make it more
flexible? Like module parameter or something else?
No immediate plans.
That hash table has been replaced with a red/black tree.