From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by ti-out-0910.google.com with SMTP id b6so705851tic.8 for ; Mon, 24 Mar 2008 12:42:16 -0700 (PDT) Message-ID: Date: Mon, 24 Mar 2008 12:42:14 -0700 From: "Ulrich Drepper" Subject: Re: [PATCH prototype] [0/8] Predictive bitmaps for ELF executables In-Reply-To: <1206335761.2438.63.camel@entropy> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080318104437.966c10ec.akpm@linux-foundation.org> <20080320090005.GA25734@one.firstfloor.org> <20080321172644.GG2346@one.firstfloor.org> <20080322071755.GP2346@one.firstfloor.org> <1206170695.2438.39.camel@entropy> <20080322091001.GA7264@one.firstfloor.org> <1206335761.2438.63.camel@entropy> Sender: owner-linux-mm@kvack.org Return-Path: To: Nicholas Miell Cc: Andi Kleen , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Sun, Mar 23, 2008 at 10:16 PM, Nicholas Miell wrote: > The limit is filesystem dependent -- I think ext2/3s is something like > 4k total for attribute names and values per inode. > > That's more than enough space for the largest executable on my system > (emacs at 36788160 bytes) which would have a 1123 byte predictive bitmap > (plus space for the name e.g. "system.predictive_bitmap"). The bitmap > also could be compressed. 4k attribute means support for about 32768 pages. That's a total of 134MB. I think this qualifies as sufficient. Also, I assume the attribute limit is just a "because nobody needed more so far" limit and could in theory be extended. -- 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