Re: [PATCH v2] block: fix the return errno for direct IO

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On 4/11/19 8:09 PM, Jason Yan wrote:
> If the last bio returned is not dio->bio, the status of the bio will
> not assigned to dio->bio if it is error. This will cause the whole IO
> status wrong.
> 
>     ksoftirqd/21-117   [021] ..s.  4017.966090:   8,0    C   N 4883648 [0]
>           <idle>-0     [018] ..s.  4017.970888:   8,0    C  WS 4924800 + 1024 [0]
>           <idle>-0     [018] ..s.  4017.970909:   8,0    D  WS 4935424 + 1024 [<idle>]
>           <idle>-0     [018] ..s.  4017.970924:   8,0    D  WS 4936448 + 321 [<idle>]
>     ksoftirqd/21-117   [021] ..s.  4017.995033:   8,0    C   R 4883648 + 336 [65475]
>     ksoftirqd/21-117   [021] d.s.  4018.001988: myprobe1: (blkdev_bio_end_io+0x0/0x168) bi_status=7
>     ksoftirqd/21-117   [021] d.s.  4018.001992: myprobe: (aio_complete_rw+0x0/0x148) x0=0xffff802f2595ad80 res=0x12a000 res2=0x0
> 
> We always have to assign bio->bi_status to dio->bio.bi_status because we
> will only check dio->bio.bi_status when we return the whole IO to
> the upper layer.

Looks good, thanks. Applide for 5.1, marked stable.

-- 
Jens Axboe




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