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f2fs: add nodiscard mount option 

This patch adds 'nodiscard' mount option.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
steinar/wifi_calib_4_9_kernel
Chao Yu 2016-07-03 22:05:14 +08:00 committed by Jaegeuk Kim
parent 72e1c797b5
commit 64058be9c8
2 changed files with 7 additions and 1 deletions
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4
Documentation/filesystems/f2fs.txt
View File

@ -109,7 +109,9 @@ background_gc=%s Turn on/off cleaning operations, namely garbage
disable_roll_forward Disable the roll-forward recovery routine
norecovery Disable the roll-forward recovery routine, mounted read-
only (i.e., -o ro,disable_roll_forward)
discard Issue discard/TRIM commands when a segment is cleaned.
discard/nodiscard Enable/disable real-time discard in f2fs, if discard is
enabled, f2fs will issue discard/TRIM commands when a
segment is cleaned.
no_heap Disable heap-style segment allocation which finds free
segments for data from the beginning of main area, while
for node from the end of main area.

4
fs/f2fs/super.c
View File

@ -76,6 +76,7 @@ enum {
Opt_disable_roll_forward,
Opt_norecovery,
Opt_discard,
Opt_nodiscard,
Opt_noheap,
Opt_user_xattr,
Opt_nouser_xattr,
@ -106,6 +107,7 @@ static match_table_t f2fs_tokens = {
{Opt_disable_roll_forward, "disable_roll_forward"},
{Opt_norecovery, "norecovery"},
{Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
{Opt_noheap, "no_heap"},
{Opt_user_xattr, "user_xattr"},
{Opt_nouser_xattr, "nouser_xattr"},
@ -426,6 +428,8 @@ static int parse_options(struct super_block *sb, char *options)
"the device does not support discard");
}
break;
case Opt_nodiscard:
clear_opt(sbi, DISCARD);
case Opt_noheap:
set_opt(sbi, NOHEAP);
break;