From: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
To: Christophe Lombard <clombard@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org, fbarrat@linux.vnet.ibm.com,
imunsie@au1.ibm.com
Subject: Re: [PATCH V3 3/7] cxl: Keep track of mm struct associated with a context
Date: Wed, 29 Mar 2017 13:58:35 +1100 [thread overview]
Message-ID: <01a90c58-05cf-83d0-eaab-1ce8a2d05bf1@au1.ibm.com> (raw)
In-Reply-To: <1490714052-18902-4-git-send-email-clombard@linux.vnet.ibm.com>
On 29/03/17 02:14, Christophe Lombard wrote:
> The mm_struct corresponding to the current task is acquired each time
> an interrupt is raised. So to simplify the code, we only get the
> mm_struct when attaching an AFU context to the process.
> The mm_count reference is increased to ensure that the mm_struct can't
> be freed. The mm_struct will be released when the context is detached.
> A reference on mm_users is not kept to avoid a circular dependency if
> the process mmaps its cxl mmio and forget to unmap before exiting.
>
> Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
--
Andrew Donnellan OzLabs, ADL Canberra
andrew.donnellan@au1.ibm.com IBM Australia Limited
next prev parent reply other threads:[~2017-03-29 2:59 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-28 15:14 [PATCH V3 0/7] cxl: Add support for Coherent Accelerator Interface Architecture 2.0 Christophe Lombard
2017-03-28 15:14 ` [PATCH V3 1/7] cxl: Read vsec perst load image Christophe Lombard
2017-03-28 23:51 ` Andrew Donnellan
2017-04-03 12:23 ` Frederic Barrat
2017-03-28 15:14 ` [PATCH V3 2/7] cxl: Remove unused values in bare-metal environment Christophe Lombard
2017-03-29 0:21 ` Andrew Donnellan
2017-03-29 15:53 ` christophe lombard
2017-04-03 12:27 ` Frederic Barrat
2017-04-05 9:34 ` christophe lombard
2017-03-28 15:14 ` [PATCH V3 3/7] cxl: Keep track of mm struct associated with a context Christophe Lombard
2017-03-29 2:58 ` Andrew Donnellan [this message]
2017-04-03 12:29 ` Frederic Barrat
2017-03-28 15:14 ` [PATCH V3 4/7] cxl: Update implementation service layer Christophe Lombard
2017-03-31 7:49 ` Andrew Donnellan
2017-04-03 12:39 ` Frederic Barrat
2017-04-05 12:34 ` christophe lombard
2017-03-28 15:14 ` [PATCH V3 5/7] cxl: Rename some psl8 specific functions Christophe Lombard
2017-03-31 7:55 ` Andrew Donnellan
2017-04-03 12:42 ` Frederic Barrat
2017-03-28 15:14 ` [PATCH V3 6/7] cxl: Isolate few psl8 specific calls Christophe Lombard
2017-04-03 12:53 ` Frederic Barrat
2017-03-28 15:14 ` [PATCH V3 7/7] cxl: Add psl9 specific code Christophe Lombard
2017-04-03 13:05 ` Frederic Barrat
2017-04-07 6:53 ` christophe lombard
2017-03-30 4:44 ` [PATCH V3 0/7] cxl: Add support for Coherent Accelerator Interface Architecture 2.0 Andrew Donnellan
2017-03-30 13:26 ` christophe lombard
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