Oops, it disappeared while versioning up...
2021년 1월 21일 (목) 오후 7:30, Chao Yu <yuch...@huawei.com>님이 작성: > > On 2021/1/14 14:23, Daeho Jeong wrote: > > From: Daeho Jeong <daehoje...@google.com> > > > > Added "ckpt_thread_ioprio" sysfs node to give a way to change checkpoint > > merge daemon's io priority. Its default value is "be,3", which means > > "BE" I/O class and I/O priority "3". We can select the class between "rt" > > and "be", and set the I/O priority within valid range of it. > > "," delimiter is necessary in between I/O class and priority number. > > > > Signed-off-by: Daeho Jeong <daehoje...@google.com> > > --- > > v2: > > - adapt to inlining ckpt_req_control of f2fs_sb_info > > --- > > Documentation/ABI/testing/sysfs-fs-f2fs | 8 ++++ > > fs/f2fs/checkpoint.c | 2 +- > > fs/f2fs/f2fs.h | 1 + > > fs/f2fs/sysfs.c | 51 +++++++++++++++++++++++++ > > 4 files changed, 61 insertions(+), 1 deletion(-) > > > > diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs > > b/Documentation/ABI/testing/sysfs-fs-f2fs > > index 3dfee94e0618..0c48b2e7dfd4 100644 > > --- a/Documentation/ABI/testing/sysfs-fs-f2fs > > +++ b/Documentation/ABI/testing/sysfs-fs-f2fs > > @@ -377,3 +377,11 @@ Description: This gives a control to limit the bio > > size in f2fs. > > Default is zero, which will follow underlying block layer > > limit, > > whereas, if it has a certain bytes value, f2fs won't submit a > > bio larger than that size. > > +What: /sys/fs/f2fs/<disk>/ckpt_thread_ioprio > > +Date: January 2021 > > +Contact: "Daeho Jeong" <daehoje...@google.com> > > +Description: Give a way to change checkpoint merge daemon's io priority. > > + Its default value is "be,3", which means "BE" I/O class and > > + I/O priority "3". We can select the class between "rt" and > > "be", > > + and set the I/O priority within valid range of it. "," > > delimiter > > + is necessary in between I/O class and priority number. > > diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c > > index e0668cec3b80..62bd6f449bb7 100644 > > --- a/fs/f2fs/checkpoint.c > > +++ b/fs/f2fs/checkpoint.c > > @@ -1840,7 +1840,7 @@ int f2fs_start_ckpt_thread(struct f2fs_sb_info *sbi) > > if (IS_ERR(cprc->f2fs_issue_ckpt)) > > return PTR_ERR(cprc->f2fs_issue_ckpt); > > > > - set_task_ioprio(cprc->f2fs_issue_ckpt, DEFAULT_CHECKPOINT_IOPRIO); > > + set_task_ioprio(cprc->f2fs_issue_ckpt, cprc->ckpt_thread_ioprio); > > Where do we set default value of cprc->ckpt_thread_ioprio? I guess it should > be f2fs_init_ckpt_req_control()? > > Thanks,
