In message <[EMAIL PROTECTED]>, Luoqi Chen write
s:
>> Background:
>> Ideally struct buf should have had a real OO like operations vector
>> like vnodes have it, and struct bioops is the first step towards that.
>>
>struct buf will eventually become merely an iocmd structure, so why do
>we want to complicate things here?
No, struct buf will remain the cache-handle. the iocmd is called
struct bio.
>We already have an OO method for bwrite: VOP_BWRITE(), the problem
>is most of the code are still calling bwrite() directly. Will it
>solve your problem if we change every bwrite() into a VOP_BWRITE()?
Well, I'm not sure it is correct to go the detour around Vnodes,
if we do, we need to add VOP_BAWRITE, VOP_BDWRITE and all those
other operations as well.
But what vnode would you use for a buffer associated with a freeblock
bitmap ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
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FreeBSD coreteam member | BSD since 4.3-tahoe
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