diff options
author | Chengguang Xu <cgxu519@gmail.com> | 2019-05-06 09:39:03 +0800 |
---|---|---|
committer | Jan Kara <jack@suse.cz> | 2019-05-20 10:50:48 +0200 |
commit | f44840ad1f822d9ecee6a3f91f2d17825a361307 (patch) | |
tree | 0a85beec33e5cf919bf290580e2f980c4a3a2fa5 /fs/quota | |
parent | a188339ca5a396acc588e5851ed7e19f66b0ebd9 (diff) | |
download | linux-f44840ad1f822d9ecee6a3f91f2d17825a361307.tar.gz linux-f44840ad1f822d9ecee6a3f91f2d17825a361307.tar.bz2 linux-f44840ad1f822d9ecee6a3f91f2d17825a361307.zip |
quota: add dqi_dirty_list description to comment of Dquot List Management
Actually there are four lists for dquot management, so add
the description of dqui_dirty_list to comment.
Signed-off-by: Chengguang Xu <cgxu519@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota')
-rw-r--r-- | fs/quota/dquot.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 9ad72ea7f71f..f9b8602d5f2d 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -223,9 +223,9 @@ static void put_quota_format(struct quota_format_type *fmt) /* * Dquot List Management: - * The quota code uses three lists for dquot management: the inuse_list, - * free_dquots, and dquot_hash[] array. A single dquot structure may be - * on all three lists, depending on its current state. + * The quota code uses four lists for dquot management: the inuse_list, + * free_dquots, dqi_dirty_list, and dquot_hash[] array. A single dquot + * structure may be on some of those lists, depending on its current state. * * All dquots are placed to the end of inuse_list when first created, and this * list is used for invalidate operation, which must look at every dquot. @@ -236,6 +236,11 @@ static void put_quota_format(struct quota_format_type *fmt) * dqstats.free_dquots gives the number of dquots on the list. When * dquot is invalidated it's completely released from memory. * + * Dirty dquots are added to the dqi_dirty_list of quota_info when mark + * dirtied, and this list is searched when writing dirty dquots back to + * quota file. Note that some filesystems do dirty dquot tracking on their + * own (e.g. in a journal) and thus don't use dqi_dirty_list. + * * Dquots with a specific identity (device, type and id) are placed on * one of the dquot_hash[] hash chains. The provides an efficient search * mechanism to locate a specific dquot. |