From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wanpeng Li Subject: [PATCH 2/2] f2fs: reduce searching region of segmap when set free section Date: Fri, 6 Mar 2015 15:00:55 +0800 Message-ID: <1425625255-4204-2-git-send-email-wanpeng.li@linux.intel.com> References: <1425625255-4204-1-git-send-email-wanpeng.li@linux.intel.com> Cc: Changman Lee , Chao Yu , linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Wanpeng Li To: Jaegeuk Kim Return-path: Received: from mga03.intel.com ([134.134.136.65]:19874 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752901AbbCFHTV (ORCPT ); Fri, 6 Mar 2015 02:19:21 -0500 In-Reply-To: <1425625255-4204-1-git-send-email-wanpeng.li@linux.intel.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: In __set_free we will check whether all segment are free in one section when free one segment, in order to set section to free status. But the searching region of segmap is from start segno to last segno of main area, it's not necessary. So let's just only check all segment bitmap of target section. Signed-off-by: Wanpeng Li --- fs/f2fs/segment.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 7fd3511..85d7fa7 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -336,7 +336,8 @@ static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno) clear_bit(segno, free_i->free_segmap); free_i->free_segments++; - next = find_next_bit(free_i->free_segmap, MAIN_SEGS(sbi), start_segno); + next = find_next_bit(free_i->free_segmap, + start_segno + sbi->segs_per_sec, start_segno); if (next >= start_segno + sbi->segs_per_sec) { clear_bit(secno, free_i->free_secmap); free_i->free_sections++; -- 1.9.1