3.6-stable review patch. If anyone has any objections, please let me know.
------------------ From: Yongqiang Yang <[email protected]> commit 2ebd1704ded88a8ae29b5f3998b13959c715c4be upstream. The resize code was needlessly writing the backup block group descriptor blocks multiple times (once per block group) during an online resize. Signed-off-by: Yongqiang Yang <[email protected]> Signed-off-by: "Theodore Ts'o" <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/ext4/resize.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -1358,13 +1358,15 @@ exit_journal: err = err2; if (!err) { - int i; + int gdb_num = group / EXT4_DESC_PER_BLOCK(sb); + int gdb_num_end = ((group + flex_gd->count - 1) / + EXT4_DESC_PER_BLOCK(sb)); + update_backups(sb, sbi->s_sbh->b_blocknr, (char *)es, sizeof(struct ext4_super_block)); - for (i = 0; i < flex_gd->count; i++, group++) { + for (; gdb_num <= gdb_num_end; gdb_num++) { struct buffer_head *gdb_bh; - int gdb_num; - gdb_num = group / EXT4_BLOCKS_PER_GROUP(sb); + gdb_bh = sbi->s_group_desc[gdb_num]; update_backups(sb, gdb_bh->b_blocknr, gdb_bh->b_data, gdb_bh->b_size); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
