From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id D7B848D0040 for ; Wed, 30 Mar 2011 05:15:17 -0400 (EDT) Subject: Re: kmemleak for MIPS From: Catalin Marinas In-Reply-To: References: <9bde694e1003020554p7c8ff3c2o4ae7cb5d501d1ab9@mail.gmail.com> <1300960540.32158.13.camel@e102109-lin.cambridge.arm.com> <1301395206.583.53.camel@e102109-lin.cambridge.arm.com> <1301399454.583.66.camel@e102109-lin.cambridge.arm.com> Date: Wed, 30 Mar 2011 10:15:05 +0100 Message-ID: <1301476505.29074.47.camel@e102109-lin.cambridge.arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: Maxin John Cc: Daniel Baluta , naveen yadav , linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org On Tue, 2011-03-29 at 20:36 +0100, Maxin John wrote: > I have prepared the combined patch for kmemleak porting to MIPS. After > applying the patch and enabling the kmemleak in Kernel, I can see one > kernel memleak reported during booting itself: ... > unreferenced object 0x8f90d000 (size 4096): > comm "swapper", pid 1, jiffies 4294937330 (age 815.000s) > hex dump (first 32 bytes): > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > backtrace: > [<80529644>] alloc_large_system_hash+0x2f8/0x410 > [<805383b4>] udp_table_init+0x4c/0x158 > [<805384dc>] udp_init+0x1c/0x94 > [<8053889c>] inet_init+0x184/0x2a0 > [<80100584>] do_one_initcall+0x174/0x1e0 > [<8051f348>] kernel_init+0xe4/0x174 > [<80103d4c>] kernel_thread_helper+0x10/0x18 If you for the kmemleak scan (via echo) a few times, do you get more leaks? The udp_table_init() function looks like it could leak some memory but I haven't seen it before. I'm not sure whether this is a false positive or a real leak. >=20 > Please let me know your comments. >=20 > Signed-off-by: Maxin B. John > Signed-off-by: Catalin Marinas I think the last line should be more like: Acked-by: Catalin Marinas -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org