On 02/02, Daeho Jeong wrote: > From: Daeho Jeong <daehoje...@google.com> > > As checkpoint=merge comes in, mount option setting related to checkpoint > had been mixed up and it became hard to understand. So, I separated > this option from "checkpoint=" and made another mount option > "checkpoint_merge" for this.
Thanks, merged to the original patch. > > Signed-off-by: Daeho Jeong <daehoje...@google.com> > --- > v2: renamed "checkpoint=merge" to "checkpoint_merge" > --- > Documentation/filesystems/f2fs.rst | 6 +++--- > fs/f2fs/super.c | 26 ++++++++++++++------------ > 2 files changed, 17 insertions(+), 15 deletions(-) > > diff --git a/Documentation/filesystems/f2fs.rst > b/Documentation/filesystems/f2fs.rst > index d0ead45dc706..475994ed8b15 100644 > --- a/Documentation/filesystems/f2fs.rst > +++ b/Documentation/filesystems/f2fs.rst > @@ -247,9 +247,9 @@ checkpoint=%s[:%u[%]] Set to "disable" to turn off > checkpointing. Set to "enabl > hide up to all remaining free space. The actual space > that > would be unusable can be viewed at > /sys/fs/f2fs/<disk>/unusable > This space is reclaimed once checkpoint=enable. > - Here is another option "merge", which creates a kernel > daemon > - and makes it to merge concurrent checkpoint requests > as much > - as possible to eliminate redundant checkpoint issues. > Plus, > +checkpoint_merge When checkpoint is enabled, this can be used to create > a kernel > + daemon and make it to merge concurrent checkpoint > requests as > + much as possible to eliminate redundant checkpoint > issues. Plus, > we can eliminate the sluggish issue caused by slow > checkpoint > operation when the checkpoint is done in a process > context in > a cgroup having low i/o budget and cpu shares. To make > this > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c > index 56696f6cfa86..d8603e6c4916 100644 > --- a/fs/f2fs/super.c > +++ b/fs/f2fs/super.c > @@ -145,6 +145,7 @@ enum { > Opt_checkpoint_disable_cap_perc, > Opt_checkpoint_enable, > Opt_checkpoint_merge, > + Opt_nocheckpoint_merge, > Opt_compress_algorithm, > Opt_compress_log_size, > Opt_compress_extension, > @@ -215,7 +216,8 @@ static match_table_t f2fs_tokens = { > {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"}, > {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"}, > {Opt_checkpoint_enable, "checkpoint=enable"}, > - {Opt_checkpoint_merge, "checkpoint=merge"}, > + {Opt_checkpoint_merge, "checkpoint_merge"}, > + {Opt_nocheckpoint_merge, "nocheckpoint_merge"}, > {Opt_compress_algorithm, "compress_algorithm=%s"}, > {Opt_compress_log_size, "compress_log_size=%u"}, > {Opt_compress_extension, "compress_extension=%s"}, > @@ -946,6 +948,9 @@ static int parse_options(struct super_block *sb, char > *options, bool is_remount) > case Opt_checkpoint_merge: > set_opt(sbi, MERGE_CHECKPOINT); > break; > + case Opt_nocheckpoint_merge: > + clear_opt(sbi, MERGE_CHECKPOINT); > + break; > #ifdef CONFIG_F2FS_FS_COMPRESSION > case Opt_compress_algorithm: > if (!f2fs_sb_has_compression(sbi)) { > @@ -1142,12 +1147,6 @@ static int parse_options(struct super_block *sb, char > *options, bool is_remount) > return -EINVAL; > } > > - if (test_opt(sbi, DISABLE_CHECKPOINT) && > - test_opt(sbi, MERGE_CHECKPOINT)) { > - f2fs_err(sbi, "checkpoint=merge cannot be used with > checkpoint=disable\n"); > - return -EINVAL; > - } > - > /* Not pass down write hints if the number of active logs is lesser > * than NR_CURSEG_PERSIST_TYPE. > */ > @@ -1782,7 +1781,7 @@ static int f2fs_show_options(struct seq_file *seq, > struct dentry *root) > seq_printf(seq, ",checkpoint=disable:%u", > F2FS_OPTION(sbi).unusable_cap); > if (test_opt(sbi, MERGE_CHECKPOINT)) > - seq_puts(seq, ",checkpoint=merge"); > + seq_puts(seq, ",checkpoint_merge"); > if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX) > seq_printf(seq, ",fsync_mode=%s", "posix"); > else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) > @@ -1827,6 +1826,7 @@ static void default_options(struct f2fs_sb_info *sbi) > sbi->sb->s_flags |= SB_LAZYTIME; > set_opt(sbi, FLUSH_MERGE); > set_opt(sbi, DISCARD); > + clear_opt(sbi, MERGE_CHECKPOINT); > if (f2fs_sb_has_blkzoned(sbi)) > F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS; > else > @@ -2066,9 +2066,8 @@ static int f2fs_remount(struct super_block *sb, int > *flags, char *data) > } > } > > - if (!test_opt(sbi, MERGE_CHECKPOINT)) { > - f2fs_stop_ckpt_thread(sbi); > - } else { > + if (!test_opt(sbi, DISABLE_CHECKPOINT) && > + test_opt(sbi, MERGE_CHECKPOINT)) { > err = f2fs_start_ckpt_thread(sbi); > if (err) { > f2fs_err(sbi, > @@ -2076,6 +2075,8 @@ static int f2fs_remount(struct super_block *sb, int > *flags, char *data) > err); > goto restore_gc; > } > + } else { > + f2fs_stop_ckpt_thread(sbi); > } > > /* > @@ -3831,7 +3832,8 @@ static int f2fs_fill_super(struct super_block *sb, void > *data, int silent) > > /* setup checkpoint request control and start checkpoint issue thread */ > f2fs_init_ckpt_req_control(sbi); > - if (test_opt(sbi, MERGE_CHECKPOINT)) { > + if (!test_opt(sbi, DISABLE_CHECKPOINT) && > + test_opt(sbi, MERGE_CHECKPOINT)) { > err = f2fs_start_ckpt_thread(sbi); > if (err) { > f2fs_err(sbi, > -- > 2.30.0.365.g02bc693789-goog > > > > _______________________________________________ > Linux-f2fs-devel mailing list > linux-f2fs-de...@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel