Re: The DM_BUFIO_HASH_BITS is defined as 20, any plan to make it flexible?

[zhangxiao]

On 2014å12æ02æ 16:36, NeilBrown wrote:
> On Tue, 2 Dec 2014 16:32:14 +0800 zhangxiao <xiao.zhang@xxxxxxxxxxxxx> 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

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>
> NeilBrown
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