From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-x241.google.com (mail-pd0-x241.google.com [IPv6:2607:f8b0:400e:c02::241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 0ABC41A0047 for ; Wed, 10 Jun 2015 16:32:39 +1000 (AEST) Received: by pdbht2 with SMTP id ht2so7464060pdb.1 for ; Tue, 09 Jun 2015 23:32:37 -0700 (PDT) From: Wenwei Tao To: izik.eidus@ravellosystems.com, aarcange@redhat.com, chrisw@sous-sol.org, hughd@google.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, viro@zeniv.linux.org.uk Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, wenweitaowenwei@gmail.com Subject: [RFC PATCH 3/6] perf: change the condition of identifying hugetlb vm Date: Wed, 10 Jun 2015 14:27:16 +0800 Message-Id: <1433917639-31699-4-git-send-email-wenweitaowenwei@gmail.com> In-Reply-To: <1433917639-31699-1-git-send-email-wenweitaowenwei@gmail.com> References: <1433917639-31699-1-git-send-email-wenweitaowenwei@gmail.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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. Signed-off-by: Wenwei Tao --- kernel/events/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index f04daab..6313bdd 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -5624,7 +5624,7 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event) flags |= MAP_EXECUTABLE; if (vma->vm_flags & VM_LOCKED) flags |= MAP_LOCKED; - if (vma->vm_flags & VM_HUGETLB) + if ((vma->vm_flags & (VM_HUGETLB | VM_MERGEABLE)) == VM_HUGETLB) flags |= MAP_HUGETLB; goto got_name; -- 1.7.9.5