From: Joerg Roedel <joro@8bytes.org>
To: suravee.suthikulpanit@amd.com
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
kim.naru@amd.com, jay.cornwall@amd.com
Subject: Re: [PATCH] iommu/amd: Take mmap_sem when calling get_user_pages
Date: Tue, 6 May 2014 20:14:39 +0200 [thread overview]
Message-ID: <20140506181438.GD12376@8bytes.org> (raw)
In-Reply-To: <1398724066-3730-1-git-send-email-suravee.suthikulpanit@amd.com>
On Mon, Apr 28, 2014 at 05:27:46PM -0500, Suthikulpanit, Suravee wrote:
> From: Jay Cornwall <jay.cornwall@amd.com>
>
> get_user_pages requires caller to hold a read lock on mmap_sem.
Right, but can't we just switch to get_user_pages_fast instead?
Joerg
next prev parent reply other threads:[~2014-05-06 18:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-28 22:27 [PATCH] iommu/amd: Take mmap_sem when calling get_user_pages suravee.suthikulpanit-5C7GfCeVMHo
2014-05-06 18:14 ` Joerg Roedel [this message]
2014-05-06 19:11 ` Suravee Suthikulanit
2014-05-06 19:27 ` Suravee Suthikulanit
[not found] ` <1398724066-3730-1-git-send-email-suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
2014-05-12 19:04 ` Joerg Roedel
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