linux-ext4 - Re: [PATCH 5/9] nowait aio: return on congested block device

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Date:   Wed, 12 Apr 2017 13:31:43 -0500
From:   Goldwyn Rodrigues <rgoldwyn@...e.de>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     linux-fsdevel@...r.kernel.org, jack@...e.com,
        linux-block@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org,
        sagi@...mberg.me, avi@...lladb.com, axboe@...nel.dk,
        linux-api@...r.kernel.org, willy@...radead.org,
        tom.leiming@...il.com, Goldwyn Rodrigues <rgoldwyn@...e.com>
Subject: Re: [PATCH 5/9] nowait aio: return on congested block device



On 04/12/2017 03:36 AM, Christoph Hellwig wrote:
> As mentioned last time around, this should be a REQ_NOWAIT flag so
> that it can be easily passed dow? n to the request layer.
> 
>> +static inline void bio_wouldblock_error(struct bio *bio)
>> +{
>> +	bio->bi_error = -EAGAIN;
>> +	bio_endio(bio);
>> +}
> 
> Please skip this helper..

Why? It is being called three times?
I am incorporating all the rest of the comments, besides this one. Thanks.

> 
>> +#define QUEUE_FLAG_NOWAIT      28	/* queue supports BIO_NOWAIT */
> 
> Please make the flag name a little more descriptive, this sounds like
> it will never wait.
> 

-- 
Goldwyn