From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaegeuk Kim Subject: [PATCH 1/5] f2fs: reuse nids more aggressively Date: Tue, 18 Aug 2015 01:46:25 -0700 Message-ID: <1439887589-35190-1-git-send-email-jaegeuk@kernel.org> Return-path: Sender: linux-fsdevel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim List-Id: linux-f2fs-devel.lists.sourceforge.net If we can reuse nids as many as possible, we can mitigate producing obsolete node pages in the page cache. Signed-off-by: Jaegeuk Kim --- fs/f2fs/node.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 6e10c2a..3cc32b8 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -306,6 +306,10 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { unsigned char version = nat_get_version(e); nat_set_version(e, inc_node_version(version)); + + /* in order to reuse the nid */ + if (nm_i->next_scan_nid > ni->nid) + nm_i->next_scan_nid = ni->nid; } /* change address */ -- 2.1.1