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Date: Thu, 2 Jul 2015 16:49:20 -0500 From: Scott Wood <scottwood@...escale.com> To: Wenwei Tao <wenweitaowenwei@...il.com> CC: <izik.eidus@...ellosystems.com>, <aarcange@...hat.com>, <chrisw@...s-sol.org>, <hughd@...gle.com>, <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>, <x86@...nel.org>, <viro@...iv.linux.org.uk>, <linux-mm@...ck.org>, <linux-fsdevel@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>, <kvm@...r.kernel.org>, <kvm-ppc@...r.kernel.org> Subject: Re: [RFC PATCH 6/6] powerpc/kvm: change the condition of identifying hugetlb vm On Wed, 2015-06-10 at 14:27 +0800, Wenwei Tao wrote: > Hugetlb VMAs are not mergeable, that means a VMA couldn't have VM_HUGETLB > and > VM_MERGEABLE been set in the same time. So we use VM_HUGETLB to indicate new > mergeable VMAs. Because of that a VMA which has VM_HUGETLB been set is a > hugetlb > VMA only if it doesn't have VM_MERGEABLE been set in the same time. Eww. If you must overload such bit combinations, please hide it behind a vm_is_hugetlb() function. -Scott -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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