From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f72.google.com (mail-wm0-f72.google.com [74.125.82.72]) by kanga.kvack.org (Postfix) with ESMTP id 458906B02FD for ; Wed, 26 Jul 2017 07:47:28 -0400 (EDT) Received: by mail-wm0-f72.google.com with SMTP id z195so267819wmz.8 for ; Wed, 26 Jul 2017 04:47:28 -0700 (PDT) Received: from mx1.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id c74si1312585wme.10.2017.07.26.04.47.26 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 26 Jul 2017 04:47:27 -0700 (PDT) From: Jan Kara Subject: [PATCH 05/10] ext4: Use pagevec_lookup_range() in ext4_find_unwritten_pgoff() Date: Wed, 26 Jul 2017 13:46:59 +0200 Message-Id: <20170726114704.7626-6-jack@suse.cz> In-Reply-To: <20170726114704.7626-1-jack@suse.cz> References: <20170726114704.7626-1-jack@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Andrew Morton , Jan Kara , linux-ext4@vger.kernel.org, Theodore Ts'o Use pagevec_lookup_range() in ext4_find_unwritten_pgoff() since we are interested only in pages in the given range. Simplify the logic as a result of not getting pages out of range and index getting automatically advanced. CC: linux-ext4@vger.kernel.org CC: "Theodore Ts'o" Signed-off-by: Jan Kara --- fs/ext4/file.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/fs/ext4/file.c b/fs/ext4/file.c index ab09cb6fcce3..ac39a6a1ea5d 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -494,12 +494,11 @@ static int ext4_find_unwritten_pgoff(struct inode *inode, pagevec_init(&pvec, 0); do { - int i, num; + int i; unsigned long nr_pages; - num = min_t(pgoff_t, end - index, PAGEVEC_SIZE - 1) + 1; - nr_pages = pagevec_lookup(&pvec, inode->i_mapping, &index, - (pgoff_t)num); + nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping, + &index, end, PAGEVEC_SIZE); if (nr_pages == 0) break; @@ -518,9 +517,6 @@ static int ext4_find_unwritten_pgoff(struct inode *inode, goto out; } - if (page->index > end) - goto out; - lock_page(page); if (unlikely(page->mapping != inode->i_mapping)) { @@ -560,12 +556,10 @@ static int ext4_find_unwritten_pgoff(struct inode *inode, unlock_page(page); } - /* The no. of pages is less than our desired, we are done. */ - if (nr_pages < num) - break; pagevec_release(&pvec); } while (index <= end); + /* There are no pages upto endoff - that would be a hole in there. */ if (whence == SEEK_HOLE && lastoff < endoff) { found = 1; *offset = lastoff; -- 2.12.3 -- 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