Date: Wed, 19 Feb 2014 20:51:55 -0800 (PST)
From: David Rientjes <rientjes@google.com>
To: Luiz Capitulino <lcapitulino@redhat.com>
cc: Marcelo Tosatti <mtosatti@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Mel Gorman <mgorman@suse.de>, Andrea Arcangeli <aarcange@redhat.com>,
        Andi Kleen <andi@firstfloor.org>, Rik van Riel <riel@redhat.com>,
        davidlohr@hp.com, isimatu.yasuaki@jp.fujitsu.com, yinghai@kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 4/4] hugetlb: add hugepages_node= command-line option
In-Reply-To: <20140219234232.07dc1eab@redhat.com>
Message-ID: <alpine.DEB.2.02.1402192048240.2568@chino.kir.corp.google.com>
References: <1392339728-13487-1-git-send-email-lcapitulino@redhat.com> <1392339728-13487-5-git-send-email-lcapitulino@redhat.com> <alpine.DEB.2.02.1402141511200.13935@chino.kir.corp.google.com> <20140214225810.57e854cb@redhat.com>
 <alpine.DEB.2.02.1402150159540.28883@chino.kir.corp.google.com> <20140217085622.39b39cac@redhat.com> <alpine.DEB.2.02.1402171518080.25724@chino.kir.corp.google.com> <20140218123013.GA20609@amt.cnet> <alpine.DEB.2.02.1402181407510.20772@chino.kir.corp.google.com>
 <20140220022254.GA25898@amt.cnet> <alpine.DEB.2.02.1402191941330.29913@chino.kir.corp.google.com> <20140219234232.07dc1eab@redhat.com>
User-Agent: Alpine 2.02 (DEB 1266 2009-07-14)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org

On Wed, 19 Feb 2014, Luiz Capitulino wrote:

> > Yes, my concrete objection is that the command line interface is 
> > unnecessary if you can dynamically allocate and free 1GB pages at runtime 
> > unless memory will be so fragmented that it cannot be done when userspace 
> > is brought up.  That is not your use case, thus this support is not 
> 
> Yes it is. The early boot is the most reliable moment to allocate huge pages
> and we want to take advantage from that.
> 

Your use case is 8GB of hugepages on a 32GB machine.  It shouldn't be 
necessary to do that at boot.

Thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/