linux-kernel - Re: [patch]blk: use correct sectors limitation for discard request

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Date:	Wed, 21 Mar 2012 09:26:45 +0800
From:	Shaohua Li <shli@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"axboe@...nel.dk" <axboe@...nel.dk>
Subject: Re: [patch]blk: use correct sectors limitation for discard request

2012/3/21 Vivek Goyal <vgoyal@...hat.com>:
> On Fri, Mar 16, 2012 at 03:40:06PM +0800, Shaohua Li wrote:
>>
>> Subject: blk: use correct sectors limitation for discard request
>>
>> max_discard_sectors doesn't equal to max_sectors/max_hw_sectors.
>> Without this,
>> discard request merge might be ignored.
>
> In other patch you are making discard request non-mergeable. So what's
> the purpose of this patch.
Yep, this one has no effect with that patch. But this is a bug, and eventually
we will support discard merge. Just to make sure it doesn't slip away.
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