linux-kernel - Re: [PATCH v4 00/10] hugetlbfs: add fallocate support

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Message-ID: <1437603594.3298.5.camel@stgolabs.net>
Date:	Wed, 22 Jul 2015 15:19:54 -0700
From:	Davidlohr Bueso <dave@...olabs.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mike Kravetz <mike.kravetz@...cle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	David Rientjes <rientjes@...gle.com>,
	Hugh Dickins <hughd@...gle.com>,
	Aneesh Kumar <aneesh.kumar@...ux.vnet.ibm.com>,
	Hillf Danton <hillf.zj@...baba-inc.com>,
	Christoph Hellwig <hch@...radead.org>,
	Michal Hocko <mhocko@...e.cz>
Subject: Re: [PATCH v4 00/10] hugetlbfs: add fallocate support

On Wed, 2015-07-22 at 15:06 -0700, Andrew Morton wrote:
> On Tue, 21 Jul 2015 11:09:34 -0700 Mike Kravetz <mike.kravetz@...cle.com> wrote:
> 
> > As suggested during the RFC process, tests have been proposed to
> > libhugetlbfs as described at:
> > http://librelist.com/browser//libhugetlbfs/2015/6/25/patch-tests-add-tests-for-fallocate-system-call/

Great!

> 
> I didn't know that libhugetlbfs has tests.  I wonder if that makes
> tools/testing/selftests/vm's hugetlbfstest harmful?

Why harmful? Redundant, maybe(?). Does anyone even use selftests for
hugetlbfs regression testing? Lets see, we also have these:

- hugepage-{mmap,shm}.c
- map_hugetlb.c

There's probably a lot of room for improvement here.

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