linux-kernel - Re: [PATCH v3 2/2] virtio-ring: Allocate indirect buffers from cache when possible

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Message-ID: <50408587.5030603@gmail.com>
Date:	Fri, 31 Aug 2012 11:36:07 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	rusty@...tcorp.com.au, virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, avi@...hat.com, kvm@...r.kernel.org
Subject: Re: [PATCH v3 2/2] virtio-ring: Allocate indirect buffers from cache
 when possible

On 08/30/2012 03:38 PM, Michael S. Tsirkin wrote:
>> +static unsigned int indirect_alloc_thresh = 16;
> Why 16?  Please make is MAX_SG + 1 this makes some sense.

Wouldn't MAX_SG mean we always allocate from the cache? Isn't the memory waste
too big in this case?

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