Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757361AbXIUJ43 (ORCPT ); Fri, 21 Sep 2007 05:56:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753558AbXIUJ4W (ORCPT ); Fri, 21 Sep 2007 05:56:22 -0400 Received: from mtagate1.uk.ibm.com ([195.212.29.134]:52876 "EHLO mtagate1.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752301AbXIUJ4V (ORCPT ); Fri, 21 Sep 2007 05:56:21 -0400 Message-ID: <46F39526.802@fr.ibm.com> Date: Fri, 21 Sep 2007 11:55:50 +0200 From: Cedric Le Goater User-Agent: Thunderbird 2.0.0.5 (X11/20070727) MIME-Version: 1.0 To: Alexey Dobriyan CC: akpm@osdl.org, linux-kernel@vger.kernel.org, devel@openvz.org Subject: Re: [PATCH 3/3] user.c: #ifdef ->mq_bytes References: <20070921094010.GC6812@localhost.sw.ru> In-Reply-To: <20070921094010.GC6812@localhost.sw.ru> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1879 Lines: 59 Hello Alexey ! Alexey Dobriyan wrote: > for those who deselect POSIX message queues. > > Reduces SLAB size of user_struct from 64 to 32 bytes here, > SLUB size -- from 40 bytes to 32 bytes. > > Signed-off-by: Alexey Dobriyan > --- > > include/linux/sched.h | 2 ++ > kernel/user.c | 2 -- > 2 files changed, 2 insertions(+), 2 deletions(-) > > --- a/include/linux/sched.h > +++ b/include/linux/sched.h > @@ -583,8 +583,10 @@ struct user_struct { > atomic_t inotify_watches; /* How many inotify watches does this user have? */ > atomic_t inotify_devs; /* How many inotify devs does this user have opened? */ > #endif > +#ifdef CONFIG_POSIX_MQUEUE > /* protected by mq_lock */ > unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */ > +#endif > unsigned long locked_shm; /* How many pages of mlocked shm ? */ while you are it, it seems possible to #ifdef locked_shm also. it's a bit more complex because the code is mm/ and there are some links with the hugetlbfs also. Cheers, C. > #ifdef CONFIG_KEYS > --- a/kernel/user.c > +++ b/kernel/user.c > @@ -44,7 +44,6 @@ struct user_struct root_user = { > .processes = ATOMIC_INIT(1), > .files = ATOMIC_INIT(0), > .sigpending = ATOMIC_INIT(0), > - .mq_bytes = 0, > .locked_shm = 0, > #ifdef CONFIG_KEYS > .uid_keyring = &root_user_keyring, > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/