From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f180.google.com (mail-wi0-f180.google.com [209.85.212.180]) by kanga.kvack.org (Postfix) with ESMTP id 354FC6B0255 for ; Sat, 22 Aug 2015 06:45:35 -0400 (EDT) Received: by widdq5 with SMTP id dq5so10523991wid.1 for ; Sat, 22 Aug 2015 03:45:34 -0700 (PDT) Received: from mail-wi0-x233.google.com (mail-wi0-x233.google.com. [2a00:1450:400c:c05::233]) by mx.google.com with ESMTPS id ek10si4315693wib.60.2015.08.22.03.45.31 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 22 Aug 2015 03:45:31 -0700 (PDT) Received: by widdq5 with SMTP id dq5so33786668wid.0 for ; Sat, 22 Aug 2015 03:45:31 -0700 (PDT) From: Ingo Molnar Subject: [PATCH 2/3] mm/vmalloc: Track vmalloc info changes Date: Sat, 22 Aug 2015 12:44:59 +0200 Message-Id: <1440240300-6206-3-git-send-email-mingo@kernel.org> In-Reply-To: <1440240300-6206-1-git-send-email-mingo@kernel.org> References: <1440240300-6206-1-git-send-email-mingo@kernel.org> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Dave Hansen , Peter Zijlstra , David Rientjes , Rik van Riel , Rasmus Villemoes , Linus Torvalds Add a 'vmap_info_changed' flag to track changes to vmalloc() statistics. For simplicity this flag is set every time we unlock the vmap_area_lock. This flag is not yet used. Cc: Linus Torvalds Cc: Andrew Morton Cc: Rik van Riel Cc: linux-mm@kvack.org Signed-off-by: Ingo Molnar --- mm/vmalloc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 605138083880..d21febaa557a 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -276,7 +276,9 @@ EXPORT_SYMBOL(vmalloc_to_pfn); #define VM_LAZY_FREEING 0x02 #define VM_VM_AREA 0x04 -static DEFINE_SPINLOCK(vmap_area_lock); +static __cacheline_aligned_in_smp DEFINE_SPINLOCK(vmap_area_lock); + +static int vmap_info_changed; static inline void vmap_lock(void) { @@ -285,6 +287,7 @@ static inline void vmap_lock(void) static inline void vmap_unlock(void) { + vmap_info_changed = 1; spin_unlock(&vmap_area_lock); } -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org