From: Bob Peterson Date: Wed, 12 Dec 2007 01:16:09 +0000 (-0600) Subject: [GFS2] Only fetch the dinode once in block_map X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b0d5fd307463405fe1f57494fbb37f810715ed6d;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [GFS2] Only fetch the dinode once in block_map Function gfs2_block_map was often looking up the disk inode twice. This optimizes it so that only does it once. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse --- diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 49486029edc2..224114166529 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -469,6 +469,7 @@ int gfs2_block_map(struct inode *inode, sector_t lblock, unsigned int maxlen = bh_map->b_size >> inode->i_blkbits; struct metapath mp; u64 size; + struct buffer_head *dibh = NULL; BUG_ON(maxlen == 0); @@ -499,6 +500,8 @@ int gfs2_block_map(struct inode *inode, sector_t lblock, error = gfs2_meta_inode_buffer(ip, &bh); if (error) goto out_fail; + dibh = bh; + get_bh(dibh); for (x = 0; x < end_of_metadata; x++) { lookup_block(ip, bh, x, &mp, create, &new, &dblock); @@ -517,13 +520,8 @@ int gfs2_block_map(struct inode *inode, sector_t lblock, if (boundary) set_buffer_boundary(bh_map); if (new) { - struct buffer_head *dibh; - error = gfs2_meta_inode_buffer(ip, &dibh); - if (!error) { - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - } + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + gfs2_dinode_out(ip, dibh->b_data); set_buffer_new(bh_map); goto out_brelse; } @@ -544,6 +542,8 @@ out_brelse: out_ok: error = 0; out_fail: + if (dibh) + brelse(dibh); bmap_unlock(inode, create); return error; }