From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Wei Liu <wei.liu2@citrix.com>
Cc: ian.campbell@citrix.com, xen-devel@lists.xensource.com,
netdev@vger.kernel.org
Subject: Re: [RFC PATCH 1/6] netback: page pool version 1
Date: Fri, 13 Jan 2012 12:37:46 -0500 [thread overview]
Message-ID: <20120113173746.GA16182@phenom.dumpdata.com> (raw)
In-Reply-To: <1326473949-22389-2-git-send-email-wei.liu2@citrix.com>
> +static idx_t free_head;
> +static int free_count;
> +static unsigned long pool_size;
> +static DEFINE_SPINLOCK(pool_lock);
> +static struct page_pool_entry *pool;
> +
> +static int get_free_entry(void)
> +{
> + unsigned long flag;
> + int idx;
> +
> + spin_lock_irqsave(&pool_lock, flag);
What is the benfit of using the irq version of the spinlock instead
of the normal one??
next prev parent reply other threads:[~2012-01-13 17:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-13 16:59 [RFC PATCH] New Xen netback implementation Wei Liu
2012-01-13 16:59 ` [RFC PATCH 1/6] netback: page pool version 1 Wei Liu
2012-01-13 17:37 ` Konrad Rzeszutek Wilk [this message]
2012-01-16 9:31 ` Wei Liu
2012-01-13 16:59 ` [RFC PATCH 2/6] netback: add module unload function Wei Liu
2012-01-13 17:57 ` [Xen-devel] " David Vrabel
2012-01-16 9:31 ` Wei Liu
2012-01-13 18:47 ` David Vrabel
2012-01-13 16:59 ` [RFC PATCH 3/6] netback: switch to NAPI + kthread model Wei Liu
2012-01-13 18:21 ` [Xen-devel] " David Vrabel
2012-01-16 9:33 ` Wei Liu
2012-01-16 10:45 ` Ian Campbell
2012-01-16 10:49 ` Wei Liu
2012-01-16 10:56 ` Paul Durrant
2012-01-16 11:09 ` Ian Campbell
2012-01-16 11:46 ` David Vrabel
2012-01-16 10:14 ` Paul Durrant
2012-01-16 10:31 ` Ian Campbell
2012-01-13 16:59 ` [RFC PATCH 4/6] netback: add module get/put operations along with vif connect/disconnect Wei Liu
2012-01-13 18:44 ` [Xen-devel] " David Vrabel
2012-01-16 9:43 ` Wei Liu
2012-01-13 16:59 ` [RFC PATCH 5/6] netback: melt xen_netbk into xenvif Wei Liu
2012-01-13 16:59 ` [RFC PATCH 6/6] netback: alter internal function/structure names Wei Liu
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