Messages in this thread | | | From | Keith Owens <> | Subject | Re: [Lse-tech] Re: [PATCH] [0/6] HUGETLB memory commitment | Date | Fri, 26 Mar 2004 14:39:09 +1100 |
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On Fri, 26 Mar 2004 14:28:26 +0530, Suparna Bhattacharya <suparna@in.ibm.com> wrote: >On Thu, Mar 25, 2004 at 04:22:32PM -0800, Andrew Morton wrote: >> Keith Owens <kaos@sgi.com> wrote: >> > >> > FWIW, lkcd (crash dump) treats hugetlb pages as normal kernel pages and >> > dumps them, which is pointless and wastes a lot of time. To avoid >> > dumping these pages in lkcd, I had to add a PG_hugetlb flag. lkcd runs > >This should already be fixed in recent versions of lkcd. It uses a >little bit of trickery to avoid an extra page flag -- hugetlb pages are >detected as "in use" as well as reserved, unlike other reserved pages >which helps identify them.
Are you sure that this works for hugetlb pages that have been preallocated but not yet mapped? AFAICT the hugetlb pages start off as reserved with a zero usecount.
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