linux-kernel - Re: [PATCH] block: unexport DISK_EVENT_MEDIA

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Message-ID: <4DB0861D.2000701@kernel.dk>
Date:	Thu, 21 Apr 2011 21:31:41 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	Tejun Heo <tj@...nel.org>
CC:	Kay Sievers <kay.sievers@...y.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block: unexport DISK_EVENT_MEDIA_CHANGE for legacy/fringe
  drivers

On 2011-04-21 21:00, Tejun Heo wrote:
> In-kernel disk event polling doesn't matter for legacy/fringe drivers
> and may lead to infinite event loop if ->check_events() implementation
> generates events on level condition instead of edge.
> 
> Now that block layer supports suppressing exporting unlisted events,
> simply leaving disk->events cleared allows these drivers to keep the
> internal revalidation behavior intact while avoiding weird
> interactions with userland event handler.

Seems like the good thing to do, I'll queue this up for 2.6.39.

-- 
Jens Axboe

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