Re: [PATCH BUGFIX V2] block: add missing group association in bio-cloning functions

[Paolo <paolo.valente@linaro.org>]

Il 10/05/2016 23:34, Jeff Moyer ha scritto:
> Paolo Valente <paolo.valente@linaro.org> writes:
>
>> diff --git a/block/bio.c b/block/bio.c
>> index 807d25e..e9b136a 100644
>> --- a/block/bio.c
>> +++ b/block/bio.c
>> @@ -622,6 +622,8 @@ struct bio *bio_clone_fast(struct bio *bio, gfp_t gfp_mask, struct bio_set *bs)
>>   		}
>>   	}
>>
>> +	bio_clone_blkcg_association(b, bio);
>> +
>>   	return b;
>>   }
>>   EXPORT_SYMBOL(bio_clone_fast);
>> @@ -695,6 +697,8 @@ integrity_clone:
>>   		}
>>   	}
>>
>> +	bio_clone_blkcg_association(bio, bio_src);
>> +
>>   	return bio;
>>   }
>>   EXPORT_SYMBOL(bio_clone_bioset);
>> @@ -1811,6 +1815,8 @@ struct bio *bio_split(struct bio *bio, int sectors,
>>
>>   	bio_advance(bio, split->bi_iter.bi_size);
>>
>> +	bio_clone_blkcg_association(split, bio);
>> +
>
> Hi, Paolo,
>
> Did you test this?  bio_split calls bio_clone_bioset or bio_clone_fast,
> so I'd be surprised if you didn't trigger that newly added warning.  :-)

Of course I didn't check the kernel log ...

I hope next version will not introduce more bugs than it will fix.

Thanks,
Paolo
> Please remove the bio_split call site.
>
> Cheers,
> Jeff
>