tree 3753263ea97748e6c2b01f29fb7f81c19381eb7b
parent 773bc4f3b6898634a80a41c72a1f34cb89992dcd
author Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1278307624 +0900
committer Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1279846932 +0900

nilfs2: add nodiscard mount option

Nilfs has "discard" mount option which issues discard/TRIM commands to
underlying block device, but it lacks a complementary option and has
no way to disable the feature through remount.

This adds "nodiscard" option to resolve this imbalance.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>