From: Peter Zijlstra <peterz@infradead.org>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: "Benjamin Herrenschmidt" <benh@kernel.crashing.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
"Rik van Riel" <riel@redhat.com>, "Mel Gorman" <mgorman@suse.de>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Andrea Arcangeli" <aarcange@redhat.com>,
"Sasha Levin" <sasha.levin@oracle.com>,
"Wanpeng Li" <liwanp@linux.vnet.ibm.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Jörn Engel" <joern@logfs.org>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
"Davidlohr Bueso" <davidlohr@hp.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
"Alex Williamson" <alex.williamson@redhat.com>,
"Alexander Graf" <agraf@suse.de>,
"Michael Ellerman" <michael@ellerman.id.au>
Subject: Re: [RFC PATCH] mm: Add helpers for locked_vm
Date: Wed, 30 Jul 2014 12:12:18 +0200 [thread overview]
Message-ID: <20140730101218.GG19379@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1406712493-9284-1-git-send-email-aik@ozlabs.ru>
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On Wed, Jul 30, 2014 at 07:28:13PM +1000, Alexey Kardashevskiy wrote:
> This adds 2 helpers to change the locked_vm counter:
> - try_increase_locked_vm - may fail if new locked_vm value will be greater
> than the RLIMIT_MEMLOCK limit;
> - decrease_locked_vm.
>
> These will be used by drivers capable of locking memory by userspace
> request. For example, VFIO can use it to check if it can lock DMA memory
> or PPC-KVM can use it to check if it can lock memory for TCE tables.
Urgh no.. have a look here:
lkml.kernel.org/r/20140526145605.016140154@infradead.org
Someone needs to go help with the IB stuff, I got properly lost in
there.
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next prev parent reply other threads:[~2014-07-30 10:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-30 9:28 Alexey Kardashevskiy
2014-07-30 10:12 ` Peter Zijlstra [this message]
2014-07-30 10:31 ` Davidlohr Bueso
2014-07-30 12:30 ` Alexey Kardashevskiy
2014-07-30 12:47 ` Peter Zijlstra
2014-08-01 10:08 ` Benjamin Herrenschmidt
2014-08-01 10:04 ` Benjamin Herrenschmidt
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