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Commit 64058be9 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: add nodiscard mount option 



This patch adds 'nodiscard' mount option.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 72e1c797

Documentation/filesystems/f2fs.txt

+3 −1
Original line number Diff line number Diff line
@@ -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.

fs/f2fs/super.c

+4 −0
Original line number Diff line number Diff line
@@ -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;