linux-kernel - RE: [PATCH 1/1] hv: Use only one txf buffer per channel and kmalloc on initialize

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Message-ID: <8AFC7968D54FB448A30D8F38F259C5622C0BCF70@TK5EX14MBXC116.redmond.corp.microsoft.com>
Date:	Mon, 13 Dec 2010 22:57:10 +0000
From:	Hank Janssen <hjanssen@...rosoft.com>
To:	Evgeniy Polyakov <zbr@...emap.net>
CC:	"gregkh@...e.de" <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Jesper Juhl <jj@...osbits.net>,
	Ky Srinivasan <ksrinivasan@...ell.com>
Subject: RE: [PATCH 1/1] hv: Use only one txf buffer per channel and kmalloc
 on initialize



-----Original Message-----
>From: Evgeniy Polyakov [mailto:zbr@...emap.net] 
>Sent: Monday, December 13, 2010 2:04 PM
>
>On Mon, Dec 13, 2010 at 01:14:21PM -0800, Hank Janssen (hjanssen@...rosoft.com) wrote:
>> +static u8 *shut_txf_buf;
>> +static u8 *time_txf_buf;
>> +static u8 *hbeat_txf_buf;
>
>Those are accessed without any kind of synchronization. I do not know exact context, but are you sure it is single-threaded?

The hv_utils driver services are all single threaded. The other drivers are not, but this one is.

Hank.


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