From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Date: Thu, 30 Nov 2017 12:01:17 -0700
From: Jason Gunthorpe <jgg@ziepe.ca>
Subject: Re: [PATCH v3 1/4] mm: introduce get_user_pages_longterm
Message-ID: <20171130190117.GF7754@ziepe.ca>
References: <151197872943.26211.6551382719053304996.stgit@dwillia2-desk3.amr.corp.intel.com>
 <151197873499.26211.11687422577653326365.stgit@dwillia2-desk3.amr.corp.intel.com>
 <20171130095323.ovrq2nenb6ztiapy@dhcp22.suse.cz>
 <CAPcyv4giMvMfP=yZr=EDRAdTWyCwWydb4JVhT6YSWP8W0PHgGQ@mail.gmail.com>
 <20171130174201.stbpuye4gu5rxwkm@dhcp22.suse.cz>
 <CAPcyv4h5GUueqB-QhbWbn39SBPDE-rOte6UcmAHSWQdVyrF2Rw@mail.gmail.com>
 <20171130181741.2y5nyflyhqxg6y5p@dhcp22.suse.cz>
 <CAPcyv4hwsGQCUcTdpT7UVJyPN0RJz+CAqGNvTSK9Ka1nsypQjA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAPcyv4hwsGQCUcTdpT7UVJyPN0RJz+CAqGNvTSK9Ka1nsypQjA@mail.gmail.com>
Sender: owner-linux-mm@kvack.org
To: Dan Williams <dan.j.williams@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Linux MM <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Christoph Hellwig <hch@lst.de>, "stable@vger.kernel.org" <stable@vger.kernel.org>, "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>, linux-rdma <linux-rdma@vger.kernel.org>
List-ID: <linux-nvdimm@lists.01.org>

On Thu, Nov 30, 2017 at 10:32:42AM -0800, Dan Williams wrote:
> > Who and how many LRU pages can pin that way and how do you prevent nasty
> > users to DoS systems this way?
> 
> I assume this is something the RDMA community has had to contend with?
> I'm not an RDMA person, I'm just here to fix dax.

The RDMA implementation respects the mlock rlimit

Jason

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jason Gunthorpe <jgg@ziepe.ca>
Subject: Re: [PATCH v3 1/4] mm: introduce get_user_pages_longterm
Date: Thu, 30 Nov 2017 12:01:17 -0700
Message-ID: <20171130190117.GF7754@ziepe.ca>
References: <151197872943.26211.6551382719053304996.stgit@dwillia2-desk3.amr.corp.intel.com>
 <151197873499.26211.11687422577653326365.stgit@dwillia2-desk3.amr.corp.intel.com>
 <20171130095323.ovrq2nenb6ztiapy@dhcp22.suse.cz>
 <CAPcyv4giMvMfP=yZr=EDRAdTWyCwWydb4JVhT6YSWP8W0PHgGQ@mail.gmail.com>
 <20171130174201.stbpuye4gu5rxwkm@dhcp22.suse.cz>
 <CAPcyv4h5GUueqB-QhbWbn39SBPDE-rOte6UcmAHSWQdVyrF2Rw@mail.gmail.com>
 <20171130181741.2y5nyflyhqxg6y5p@dhcp22.suse.cz>
 <CAPcyv4hwsGQCUcTdpT7UVJyPN0RJz+CAqGNvTSK9Ka1nsypQjA@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <stable-owner@vger.kernel.org>
Content-Disposition: inline
In-Reply-To: <CAPcyv4hwsGQCUcTdpT7UVJyPN0RJz+CAqGNvTSK9Ka1nsypQjA@mail.gmail.com>
Sender: stable-owner@vger.kernel.org
To: Dan Williams <dan.j.williams@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Linux MM <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Christoph Hellwig <hch@lst.de>, "stable@vger.kernel.org" <stable@vger.kernel.org>, "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>, linux-rdma <linux-rdma@vger.kernel.org>
List-Id: linux-rdma@vger.kernel.org

On Thu, Nov 30, 2017 at 10:32:42AM -0800, Dan Williams wrote:
> > Who and how many LRU pages can pin that way and how do you prevent nasty
> > users to DoS systems this way?
> 
> I assume this is something the RDMA community has had to contend with?
> I'm not an RDMA person, I'm just here to fix dax.

The RDMA implementation respects the mlock rlimit

Jason