Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 18 Dec 2023 09:45:03 -0800 | From | Jaegeuk Kim <> | Subject | Re: [PATCH V3] f2fs: show more discard status by sysfs |
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On 12/18, Zhiguo Niu wrote: > The current pending_discard attr just only shows the discard_cmd_cnt > information. More discard status can be shown so that we can check > them through sysfs when needed. > > Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.com> > --- > changes of v2: Improve the patch according to Chao's suggestions. > changes of v3: Add a blank line for easy reading. > --- > --- > Documentation/ABI/testing/sysfs-fs-f2fs | 6 ++++++ > fs/f2fs/sysfs.c | 19 +++++++++++++++++++ > 2 files changed, 25 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs > index 36c3cb5..c6970e5 100644 > --- a/Documentation/ABI/testing/sysfs-fs-f2fs > +++ b/Documentation/ABI/testing/sysfs-fs-f2fs > @@ -498,6 +498,12 @@ Description: Show status of f2fs checkpoint in real time. > CP_RESIZEFS_FLAG 0x00004000 > =============================== ============================== > > +What: /sys/fs/f2fs/<disk>/stat/discard_status > +Date: November 2023 > +Contact: "Zhiguo Niu" <zhiguo.niu@unisoc.com> > +Description: Show status of f2fs discard in real time, including > + "issued discard","queued discard" and "undiscard blocks". > + > What: /sys/fs/f2fs/<disk>/ckpt_thread_ioprio > Date: January 2021 > Contact: "Daeho Jeong" <daehojeong@google.com> > diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c > index 417fae96..312a4dc 100644 > --- a/fs/f2fs/sysfs.c > +++ b/fs/f2fs/sysfs.c > @@ -134,6 +134,22 @@ static ssize_t cp_status_show(struct f2fs_attr *a, > return sysfs_emit(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags)); > } > > +static ssize_t discard_status_show(struct f2fs_attr *a, > + struct f2fs_sb_info *sbi, char *buf) > +{ > + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; > + > + if (!dcc) > + return -EINVAL; > + > + return sysfs_emit(buf, "%llu, %llu, %u\n", > + (unsigned long long)atomic_read( > + &dcc->issued_discard), > + (unsigned long long)atomic_read( > + &dcc->queued_discard), > + dcc->undiscard_blks);
We cannot do this since it needs one value per one entry.
> +} > + > static ssize_t pending_discard_show(struct f2fs_attr *a, > struct f2fs_sb_info *sbi, char *buf) > { > @@ -1197,9 +1213,12 @@ static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a, > > F2FS_GENERAL_RO_ATTR(sb_status); > F2FS_GENERAL_RO_ATTR(cp_status); > +F2FS_GENERAL_RO_ATTR(discard_status); > + > static struct attribute *f2fs_stat_attrs[] = { > ATTR_LIST(sb_status), > ATTR_LIST(cp_status), > + ATTR_LIST(discard_status), > NULL, > }; > ATTRIBUTE_GROUPS(f2fs_stat); > -- > 1.9.1
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