From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id E0D856B00A2 for ; Wed, 17 Dec 2008 06:38:09 -0500 (EST) Subject: Re: [PATCH] mm: kill page_queue_congested() From: Peter Zijlstra In-Reply-To: <20081217202547.FF22.KOSAKI.MOTOHIRO@jp.fujitsu.com> References: <20081217202547.FF22.KOSAKI.MOTOHIRO@jp.fujitsu.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Wed, 17 Dec 2008 12:39:50 +0100 Message-Id: <1229513990.9487.73.camel@twins> Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: LKML , linux-mm , Andrew Morton List-ID: On Wed, 2008-12-17 at 20:27 +0900, KOSAKI Motohiro wrote: > == > Subject: [PATCH] mm: kill page_queue_congested() > > page_queue_congested() was introduced at 2002. > but it is unused until now at all. > > it can be removed. Or we can hook it up in vmscan, and skip congested pages on high scan order or something.. > Signed-off-by: KOSAKI Motohiro > --- > mm/swapfile.c | 20 -------------------- > 1 file changed, 20 deletions(-) > > Index: b/mm/swapfile.c > =================================================================== > --- a/mm/swapfile.c > +++ b/mm/swapfile.c > @@ -1203,26 +1203,6 @@ out: > return ret; > } > > -#if 0 /* We don't need this yet */ > -#include > -int page_queue_congested(struct page *page) > -{ > - struct backing_dev_info *bdi; > - > - BUG_ON(!PageLocked(page)); /* It pins the swap_info_struct */ > - > - if (PageSwapCache(page)) { > - swp_entry_t entry = { .val = page_private(page) }; > - struct swap_info_struct *sis; > - > - sis = get_swap_info_struct(swp_type(entry)); > - bdi = sis->bdev->bd_inode->i_mapping->backing_dev_info; > - } else > - bdi = page->mapping->backing_dev_info; > - return bdi_write_congested(bdi); > -} > -#endif > - > asmlinkage long sys_swapoff(const char __user * specialfile) > { > struct swap_info_struct * p = NULL; > > > -- > 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, 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