linux-kernel - Re: [PATCH v7 0/5] AIO add per-command iopriority

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Date:   Tue, 22 May 2018 19:30:19 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     adam.manzanares@....com, linux-fsdevel@...r.kernel.org,
        bcrl@...ck.org, mingo@...nel.org, tglx@...utronix.de,
        kstewart@...uxfoundation.org, peterz@...radead.org,
        pombredanne@...b.com, gregkh@...uxfoundation.org,
        bigeasy@...utronix.de, rgoldwyn@...e.com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-aio@...ck.org, linux-api@...r.kernel.org, hch@...radread.org,
        jmoyer@...hat.com
Subject: Re: [PATCH v7 0/5] AIO add per-command iopriority

On Tue, May 22, 2018 at 11:55:04AM -0600, Jens Axboe wrote:
> On 5/22/18 11:52 AM, adam.manzanares@....com wrote:
> > From: Adam Manzanares <adam.manzanares@....com>
> > 
> > This is the per-I/O equivalent of the ioprio_set system call.
> > See the following link for performance implications on a SATA HDD:
> > https://lkml.org/lkml/2016/12/6/495
> > 
> > First patch factors ioprio_check_cap function out of ioprio_set system call to
> > also be used by the aio ioprio interface.
> > 
> > Second patch converts kiocb ki_hint field to a u16 to avoid kiocb bloat.
> > 
> > Third patch passes ioprio hint from aio iocb to kiocb and initializes kiocb
> > ioprio value appropriately when it is not explicitly set.
> > 
> > Fourth patch enables the feature for blkdev.
> > 
> > Fifth patch enables the feature for iomap direct IO
> 
> LGTM, you can add:
> 
> Reviewed-by: Jens Axboe <axboe@...nel.dk>
> 
> Al, are you picking this series up, or should I?

Probably better if I do, once I finish reviewing Christoph's patchset -
we already have a bunch of stuff around fs/aio.c in this cycle...