From: William Lee Irwin III <wli@holomorphy.com>
To: Keith Owens <kaos@sgi.com>
Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: More bug fix in mm/hugetlb.c - fix try_to_free_low()
Date: Wed, 23 Jun 2004 15:35:21 -0700 [thread overview]
Message-ID: <20040623223521.GI1552@holomorphy.com> (raw)
In-Reply-To: <10650.1088029049@ocs3.ocs.com.au>
On Thu, Jun 24, 2004 at 08:17:29AM +1000, Keith Owens wrote:
> While we are discussing hugetlb, what is the official method of
> identifying a hugetlb page - at the page level, not through a vma?
> When taking a crash dump, hugetlb pages must be treated as user data,
> not as kernel pages. LKCD must be able to identify hugetlb pages from
> the page struct, dumping cannot assume that any mm context is valid so
> vma scans are out. The identification method must work whether the
> hugetlb pages are in use or not. In 2.4 LKCD I added PG_hugetlb, but I
> would prefer a test that did not require yet another PG flag.
PG_compound should get you going. You might want to do some extra
checks for order and release function just to be sure.
-- wli
prev parent reply other threads:[~2004-06-23 22:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-23 19:33 More bug fix in mm/hugetlb.c - fix try_to_free_low() Chen, Kenneth W
2004-06-23 19:42 ` William Lee Irwin III
2004-06-23 21:50 ` Chen, Kenneth W
2004-06-23 22:17 ` Keith Owens
2004-06-23 22:24 ` Chen, Kenneth W
2004-06-23 22:35 ` William Lee Irwin III [this message]
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