[dm-devel] The DM_BUFIO_HASH_BITS is defined as 20, any plan to make it flexible?

[zhangxiao]

On 2014年12月02日 16:36, NeilBrown wrote:
> On Tue, 2 Dec 2014 16:32:14 +0800 zhangxiao <xiao.zhang at windriver.com> wrote:
>
>> Hi NeilBrown,
>>
>> See drivers/md/dm-bufio.c as below:
>>     50 /*
>>     51  * Buffer hash
>>     52  */
>>     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?
>>
>
> Thanks, but this question should be address to:
>
Thank you for your kindly remind. :-)

Regards
Xiao

> DEVICE-MAPPER  (LVM)
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>
> NeilBrown
>