From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 23 Apr 2008 22:06:37 +0900 From: KOSAKI Motohiro Subject: Re: [patch 01/18] hugetlb: fix lockdep spew In-Reply-To: <20080423015429.726163000@nick.local0.net> References: <20080423015302.745723000@nick.local0.net> <20080423015429.726163000@nick.local0.net> Message-Id: <20080423220416.E3B0.KOSAKI.MOTOHIRO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: npiggin@suse.de Cc: kosaki.motohiro@jp.fujitsu.com, akpm@linux-foundation.org, linux-mm@kvack.org, andi@firstfloor.org, kniht@linux.vnet.ibm.com, nacc@us.ibm.com, abh@cray.com, wli@holomorphy.com List-ID: Hi > > spin_lock(&dst->page_table_lock); > - spin_lock(&src->page_table_lock); > + spin_lock_nested(&src->page_table_lock, SINGLE_DEPTH_NESTING); > if (!pte_none(*src_pte)) { > if (cow) > ptep_set_wrprotect(src, addr, src_pte); > Good improvement :) Acked-by: KOSAKI Motohiro -- 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