majianpeng writes:
> On 2012-07-27 22:21 Jeff Moyer Wrote:
>>majianpeng writes:
>>
>>> When exec bio_alloc, the bi_rw is zero.But after calling bio_add_page,
>>> it will use bi_rw.
>>> Fox example, in functiion __bio_add_page,it will call merge_bvec_fn().
>>> The merge_bvec_fn of raid456 will
majianpeng majianp...@gmail.com writes:
On 2012-07-27 22:21 Jeff Moyer jmo...@redhat.com Wrote:
majianpeng majianp...@gmail.com writes:
When exec bio_alloc, the bi_rw is zero.But after calling bio_add_page,
it will use bi_rw.
Fox example, in functiion __bio_add_page,it will call
On 2012-07-27 22:21 Jeff Moyer Wrote:
>majianpeng writes:
>
>> When exec bio_alloc, the bi_rw is zero.But after calling bio_add_page,
>> it will use bi_rw.
>> Fox example, in functiion __bio_add_page,it will call merge_bvec_fn().
>> The merge_bvec_fn of raid456 will use the bi_rw to judge the
On 2012-07-27 22:21 Jeff Moyer jmo...@redhat.com Wrote:
majianpeng majianp...@gmail.com writes:
When exec bio_alloc, the bi_rw is zero.But after calling bio_add_page,
it will use bi_rw.
Fox example, in functiion __bio_add_page,it will call merge_bvec_fn().
The merge_bvec_fn of raid456 will
majianpeng writes:
> When exec bio_alloc, the bi_rw is zero.But after calling bio_add_page,
> it will use bi_rw.
> Fox example, in functiion __bio_add_page,it will call merge_bvec_fn().
> The merge_bvec_fn of raid456 will use the bi_rw to judge the merge.
>>> if ((bvm->bi_rw & 1) == WRITE)
>>>
When exec bio_alloc, the bi_rw is zero.But after calling bio_add_page,
it will use bi_rw.
Fox example, in functiion __bio_add_page,it will call merge_bvec_fn().
The merge_bvec_fn of raid456 will use the bi_rw to judge the merge.
>> if ((bvm->bi_rw & 1) == WRITE)
>> return
When exec bio_alloc, the bi_rw is zero.But after calling bio_add_page,
it will use bi_rw.
Fox example, in functiion __bio_add_page,it will call merge_bvec_fn().
The merge_bvec_fn of raid456 will use the bi_rw to judge the merge.
if ((bvm-bi_rw 1) == WRITE)
return biovec-bv_len; /*
majianpeng majianp...@gmail.com writes:
When exec bio_alloc, the bi_rw is zero.But after calling bio_add_page,
it will use bi_rw.
Fox example, in functiion __bio_add_page,it will call merge_bvec_fn().
The merge_bvec_fn of raid456 will use the bi_rw to judge the merge.
if ((bvm-bi_rw 1) ==
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