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From: Andi Kleen <andi@firstfloor.org>
To: Mike Kravetz <mike.kravetz@oracle.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Davidlohr Bueso <dave@stgolabs.net>,
	Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [PATCH 0/4] hugetlbfs: optionally reserve all fs pages at mount time
Date: Fri, 06 Mar 2015 14:13:33 -0800	[thread overview]
Message-ID: <87lhj9ai5u.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <1425432106-17214-1-git-send-email-mike.kravetz@oracle.com> (Mike Kravetz's message of "Tue, 3 Mar 2015 17:21:42 -0800")

Mike Kravetz <mike.kravetz@oracle.com> writes:

> hugetlbfs allocates huge pages from the global pool as needed.  Even if
> the global pool contains a sufficient number pages for the filesystem
> size at mount time, those global pages could be grabbed for some other
> use.  As a result, filesystem huge page allocations may fail due to lack
> of pages.


What's the difference of this new option to simply doing

mount -t hugetlbfs none /huge
echo XXX > /proc/sys/vm/nr_hugepages

?

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only

  parent reply	other threads:[~2015-03-06 22:13 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-04  1:21 Mike Kravetz
2015-03-04  1:21 ` [PATCH 1/4] hugetlbfs: add reserved mount fields to subpool structure Mike Kravetz
2015-03-04  1:21 ` [PATCH 2/4] hugetlbfs: coordinate global and subpool reserve accounting Mike Kravetz
2015-03-04  1:21 ` [PATCH 3/4] hugetlbfs: accept subpool reserved option and setup accordingly Mike Kravetz
2015-03-04  1:21 ` [PATCH 4/4] hugetlbfs: document reserved mount option Mike Kravetz
2015-03-04  5:49 ` [PATCH 0/4] hugetlbfs: optionally reserve all fs pages at mount time David Rientjes
2015-03-04 17:21   ` Mike Kravetz
2015-03-06 22:13 ` Andi Kleen [this message]
2015-03-06 22:30   ` Mike Kravetz

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