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Message-ID: <30e8e33f-8e66-2fb3-977a-ee6fe04f1d3c@wdc.com>
Date: Tue, 22 May 2018 22:31:27 +0000
From: Adam Manzanares <Adam.Manzanares@....com>
To: Jens Axboe <axboe@...nel.dk>, Al Viro <viro@...IV.linux.org.uk>
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Subject: Re: [PATCH v7 0/5] AIO add per-command iopriority
On 5/22/18 11:30 AM, Jens Axboe wrote:
> On 5/22/18 12:30 PM, Al Viro wrote:
>> 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...
>
> Alright, sounds good, thanks Al.
>
I was working on the man page update for this feature and noticed I
could be bit more informative on error if I return the error value
returned by ioprio_check_cap in fs/aio.c.
Should I resend the whole series?
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