Re: [PATCH v2 1/7] splice: don't generate zero-len segement bvecs

[Pavel Begunkov]

On 04/01/2021 16:17, Christoph Hellwig wrote:
> On Sat, Jan 02, 2021 at 03:17:33PM +0000, Pavel Begunkov wrote:
>> iter_file_splice_write() may spawn bvec segments with zero-length. In
>> preparation for prohibiting them, filter out by hand at splice level.
>>
>> Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
>> ---
>>  fs/splice.c | 9 +++++----
>>  1 file changed, 5 insertions(+), 4 deletions(-)
>>
>> diff --git a/fs/splice.c b/fs/splice.c
>> index 866d5c2367b2..7299330c3270 100644
>> --- a/fs/splice.c
>> +++ b/fs/splice.c
>> @@ -644,7 +644,6 @@ iter_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
>>  		ret = splice_from_pipe_next(pipe, &sd);
>>  		if (ret <= 0)
>>  			break;
>> -
> 
> Spurious empty line removal..
> 
>> +			if (!this_len)
>> +				continue;
> 
> Maybe throw in a comment on why we skip empty segments here?

Definitely won't hurt. Thanks for taking a look

> 
> Otherwise looks good:
> 
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> 

-- 
Pavel Begunkov