Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932224AbVLANXc (ORCPT ); Thu, 1 Dec 2005 08:23:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932228AbVLANXc (ORCPT ); Thu, 1 Dec 2005 08:23:32 -0500 Received: from mail3.netbeat.de ([193.254.185.27]:63916 "HELO mail3.netbeat.de") by vger.kernel.org with SMTP id S932224AbVLANXb (ORCPT ); Thu, 1 Dec 2005 08:23:31 -0500 Subject: [PATCH 2/4] linux-2.6-block: deactivating pagecache for benchmarks From: Dirk Henning Gerdes To: Jens Axboe Cc: LKML Content-Type: text/plain Date: Thu, 01 Dec 2005 14:23:20 +0100 Message-Id: <1133443400.6110.39.camel@noti> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2239 Lines: 90 the code for the /proc/benchmark/pagecache Signed-Off-By: Dirk Gerdes --- --- linux-2.6-block_clean/block/pagecache.c 2005-12-01 12:24:30.000000000 +0100 +++ linux-2.6-block-pagecache-clean/block/pagecache.c 2005-11-30 17:14:40.000000000 +0100 @@ -0,0 +1,75 @@ +#include +#include +#include +#include +#include +//#include + + +MODULE_LICENSE("GPL"); + +extern int pagecache; + + +static struct proc_dir_entry *benchmark_dir, + *pagecache_entry; + + + + + + +static int pagecache_entry_read(char *buf, char **start,off_t offset,int size, int *eof, void *data) +{ + int bytes_written = 0; + if (pagecache) + bytes_written = snprintf(buf, size, "[on] off\n"); + else + bytes_written = snprintf(buf, size, " on [off]\n"); + return bytes_written; +} + +static int pagecache_entry_write(struct file * instanz, const char __user *userbuffer, unsigned long count, void *data) +{ + char *kernel_buffer; + int not_copied; + + kernel_buffer = kmalloc(count, GFP_KERNEL); + if (!kernel_buffer) + return -ENOMEM; + not_copied = copy_from_user(kernel_buffer, userbuffer, count); + if (strncmp (kernel_buffer,"on",2)==0){ + pagecache=1; + } + else if (strncmp (kernel_buffer,"off",3)==0){ + pagecache=0; + } + + kfree(kernel_buffer); + return count-not_copied; +} + +static int __init my_init(void) +{ + + + benchmark_dir = proc_mkdir("benchmark",NULL); + pagecache_entry = create_proc_entry("pagecache",S_IRUGO, benchmark_dir); + if (pagecache_entry){ + pagecache_entry->read_proc = pagecache_entry_read; + pagecache_entry->write_proc = pagecache_entry_write; + + pagecache_entry->data = NULL; + } + + return 0; +} +static void __exit my_exit(void){ + if (pagecache_entry) remove_proc_entry("pagecache",benchmark_dir); + if (benchmark_dir) remove_proc_entry("benchmark",NULL); +} + + +module_init(my_init); +module_exit(my_exit); + - 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/