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Date: Tue, 25 Jul 2017 15:47:44 -0400
From: Josef Bacik <josef@toxicpanda.com>
Subject: Re: [PATCH v2 22/23] percpu: update pcpu_find_block_fit to use an
 iterator
Message-ID: <20170725194744.GV18880@destiny>
References: <20170724230220.21774-1-dennisz@fb.com>
 <20170724230220.21774-23-dennisz@fb.com>
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In-Reply-To: <20170724230220.21774-23-dennisz@fb.com>
Sender: owner-linux-mm@kvack.org
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To: Dennis Zhou <dennisz@fb.com>
Cc: Tejun Heo <tj@kernel.org>, Christoph Lameter <cl@linux.com>, Josef Bacik <josef@toxicpanda.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, kernel-team@fb.com, Dennis Zhou <dennisszhou@gmail.com>

On Mon, Jul 24, 2017 at 07:02:19PM -0400, Dennis Zhou wrote:
> From: "Dennis Zhou (Facebook)" <dennisszhou@gmail.com>
> 
> The simple, and expensive, way to find a free area is to iterate over
> the entire bitmap until an area is found that fits the allocation size
> and alignment. This patch makes use of an iterate that find an area to
> check by using the block level contig hints. It will only return an area
> that can fit the size and alignment request. If the request can fit
> inside a block, it returns the first_free bit to start checking from to
> see if it can be fulfilled prior to the contig hint. The pcpu_alloc_area
> check has a bound of a block size added in case it is wrong.
> 
> Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>

Reviewed-by: Josef Bacik <jbacik@fb.com>

Thanks,

Josef

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