Re: [dm-devel] [PATCH v2 04/14] block: Add bio_clone_kmalloc()

[Yehuda Sadeh <yehuda inktank com>]

On Thu, May 24, 2012 at 11:59 AM, Vivek Goyal <vgoyal redhat com> wrote:
> On Wed, May 23, 2012 at 05:02:41PM -0700, Kent Overstreet wrote:
>
> [..]
>> diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
>> index 013c7a5..5a953c6 100644
>> --- a/drivers/block/rbd.c
>> +++ b/drivers/block/rbd.c
>> @@ -729,7 +729,7 @@ static struct bio *bio_chain_clone(struct bio **old, struct bio **next,
>>       }
>>
>>       while (old_chain && (total < len)) {
>> -             tmp = bio_kmalloc(gfpmask, old_chain->bi_max_vecs);
>> +             tmp = bio_clone_kmalloc(old_chain, gfpmask);
>>               if (!tmp)
>>                       goto err_out;
>>
>> @@ -751,13 +751,9 @@ static struct bio *bio_chain_clone(struct bio **old, struct bio **next,
>>                       if (!bp)
>>                               goto err_out;
>>
>> -                     __bio_clone(tmp, &bp->bio1);
>> -
>>                       *next = &bp->bio2;
>
> Is this code correct. Now original code might clone bio after split and
> new code will clone the original bio itself and not the split one?
>

Yeah, that's wrong.

Yehuda