linux-kernel - Re: [PATCHSET] block/SCSI: implement in-kernel disk event handling, take#2

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Message-ID: <AANLkTinYnb5Aby+d5h64+XmdEj5HT5YDP45GX7BTYArN@mail.gmail.com>
Date:	Thu, 16 Dec 2010 17:44:59 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	James Bottomley <James.Bottomley@...senpartnership.com>
Cc:	Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
	jeff@...zik.org, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	jack@...e.cz
Subject: Re: [PATCHSET] block/SCSI: implement in-kernel disk event handling, take#2

On Thu, Dec 16, 2010 at 17:38, James Bottomley
<James.Bottomley@...senpartnership.com> wrote:
> On Thu, 2010-12-16 at 17:36 +0100, Jens Axboe wrote:
>> On 2010-12-16 17:31, Tejun Heo wrote:
>> > On 12/08/2010 08:57 PM, Tejun Heo wrote:
>> >> This is the second take of in-kernel-disk-event patchset which
>> >> implements in-kernel disk event handling framework and adds support
>> >> for it to sr and sd.  This is largely to move media presence polling
>> >> into kernel as userspace implementation turned out to be quite
>> >> problematic over the years.
>> >
>> > Kay, Jens, James, how does this look to you guys?
>>
>> I like the concept, this is probably what we should have done all along.
>> The user space method has been tried and failed. So I was mostly laying
>> it low waiting for feedback before integrating this.
>
> Me too pretty much ... event driven is nice, but it only really works if
> the userspace stuff will stop polling ...

David Zeuthen and I will take care of it, and leave the devices alone
when the kernel tells us it's not needed to poll from userspace.

Kay
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