diff options
author | Gu Zheng <guz.fnst@cn.fujitsu.com> | 2014-04-11 17:50:00 +0800 |
---|---|---|
committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2014-05-07 10:21:55 +0900 |
commit | 876dc59eb1f0131c092803d0d206d47dd0119dfe (patch) | |
tree | aab91a229ed656fa30000c5112b52206cc69cfbe /fs/f2fs | |
parent | 8abfb36ab396377ea712cd640c525fd5535d1dc9 (diff) | |
download | linux-876dc59eb1f0131c092803d0d206d47dd0119dfe.tar.bz2 |
f2fs: add the flush_merge handle in the remount flow
Add the *remount* handle of flush_merge option, so that the users
can enable flush_merge in the runtime, such as the underlying device
handles the cache_flush command relatively slowly.
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs')
-rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
-rw-r--r-- | fs/f2fs/segment.c | 2 | ||||
-rw-r--r-- | fs/f2fs/super.c | 45 |
3 files changed, 45 insertions, 3 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index d3180f8c0f97..55152de1118c 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1177,6 +1177,7 @@ void destroy_node_manager_caches(void); */ void f2fs_balance_fs(struct f2fs_sb_info *); void f2fs_balance_fs_bg(struct f2fs_sb_info *); +int issue_flush_thread(void *); int f2fs_issue_flush(struct f2fs_sb_info *); void invalidate_blocks(struct f2fs_sb_info *, block_t); void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t); diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 9993f94848fc..f6816e18db98 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -197,7 +197,7 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi) f2fs_sync_fs(sbi->sb, true); } -static int issue_flush_thread(void *data) +int issue_flush_thread(void *data) { struct f2fs_sb_info *sbi = data; struct f2fs_sm_info *sm_i = SM_I(sbi); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 5e20d2a36eac..bea642aec0fe 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -594,6 +594,8 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data) struct f2fs_sb_info *sbi = F2FS_SB(sb); struct f2fs_mount_info org_mount_opt; int err, active_logs; + bool need_restart_gc = false; + bool need_stop_gc = false; sync_filesystem(sb); @@ -611,7 +613,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data) /* * Previous and new state of filesystem is RO, - * so no point in checking GC conditions. + * so skip checking GC and FLUSH_MERGE conditions. */ if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) goto skip; @@ -625,18 +627,57 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data) if (sbi->gc_thread) { stop_gc_thread(sbi); f2fs_sync_fs(sb, 1); + need_restart_gc = true; } } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { err = start_gc_thread(sbi); if (err) goto restore_opts; + need_stop_gc = true; + } + + /* + * We stop issue flush thread if FS is mounted as RO + * or if flush_merge is not passed in mount option. + */ + if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { + struct f2fs_sm_info *sm_info = sbi->sm_info; + + if (sm_info->f2fs_issue_flush) + kthread_stop(sm_info->f2fs_issue_flush); + sm_info->issue_list = sm_info->dispatch_list = NULL; + sm_info->f2fs_issue_flush = NULL; + } else if (test_opt(sbi, FLUSH_MERGE)) { + struct f2fs_sm_info *sm_info = sbi->sm_info; + + if (!sm_info->f2fs_issue_flush) { + dev_t dev = sbi->sb->s_bdev->bd_dev; + + spin_lock_init(&sm_info->issue_lock); + init_waitqueue_head(&sm_info->flush_wait_queue); + sm_info->f2fs_issue_flush = + kthread_run(issue_flush_thread, sbi, + "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev)); + if (IS_ERR(sm_info->f2fs_issue_flush)) { + err = PTR_ERR(sm_info->f2fs_issue_flush); + sm_info->f2fs_issue_flush = NULL; + goto restore_gc; + } + } } skip: /* Update the POSIXACL Flag */ sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); return 0; - +restore_gc: + if (need_restart_gc) { + if (start_gc_thread(sbi)) + f2fs_msg(sbi->sb, KERN_WARNING, + "background gc thread is stop"); + } else if (need_stop_gc) { + stop_gc_thread(sbi); + } restore_opts: sbi->mount_opt = org_mount_opt; sbi->active_logs = active_logs; |