linux-kernel - Re: [PATCH RFC 08/12] xen-blkback: use balloon pages for all mappings

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Date:	Tue, 26 Mar 2013 18:30:41 +0100
From:	Roger Pau Monné <roger.pau@...rix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>
Subject: Re: [PATCH RFC 08/12] xen-blkback: use balloon pages for all mappings

On 04/03/13 21:22, Konrad Rzeszutek Wilk wrote:
[...]
>> @@ -535,13 +604,17 @@ purge_gnt_list:
>>                               msecs_to_jiffies(xen_blkif_lru_interval);
>>               }
>>
>> +             remove_free_pages(blkif, xen_blkif_max_buffer_pages);
>> +
>>               if (log_stats && time_after(jiffies, blkif->st_print))
>>                       print_stats(blkif);
>>       }
>>
>> +     remove_free_pages(blkif, 0);
> 
> What purpose does that have?

This removes all the pages from the pool before closing down.
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