linux-kernel - Re: [PATCH v5 0/5] AIO add per-command iopriority

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Message-ID: <9791140b-1674-0e36-cbd9-f2bf8b6b25f5@wdc.com>
Date:   Mon, 21 May 2018 21:42:22 +0000
From:   Adam Manzanares <Adam.Manzanares@....com>
To:     Jeff Moyer <jmoyer@...hat.com>
CC:     "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "bcrl@...ck.org" <bcrl@...ck.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...nel.org" <mingo@...nel.org>,
        "pombredanne@...b.com" <pombredanne@...b.com>,
        "kstewart@...uxfoundation.org" <kstewart@...uxfoundation.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "bigeasy@...utronix.de" <bigeasy@...utronix.de>,
        "jack@...e.cz" <jack@...e.cz>,
        "darrick.wong@...cle.com" <darrick.wong@...cle.com>,
        "rgoldwyn@...e.com" <rgoldwyn@...e.com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-aio@...ck.org" <linux-aio@...ck.org>,
        "linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
        "hch@...radead.org" <hch@...radead.org>
Subject: Re: [PATCH v5 0/5] AIO add per-command iopriority



On 5/21/18 1:57 PM, Jeff Moyer wrote:
> Hi, Adam,
> 
> adam.manzanares@....com writes:
> 
>> 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 inititalizes 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
>>
>> Note: this work is based on top of linux-vfs/for-next
> 
> I'll cook up a libaio test case.  Can you put together a man-pages
> update for this?

Hello Jeff,

I'll send out a man-pages update soon.

Thanks,
Adam

> 
> Thanks!
> Jeff
>