Messages in this thread | | | Subject | Re: [f2fs-dev] [PATCH v3 1/2] f2fs: introduce checkpoint=merge mount option | From | Chao Yu <> | Date | Mon, 18 Jan 2021 16:51:03 +0800 |
| |
On 2021/1/16 9:00, Daeho Jeong wrote: > From: Daeho Jeong <daehojeong@google.com> > > We've added a new mount option "checkpoint=merge", which creates a > kernel daemon and makes 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, and The below verification result > explains this.
Could you please summary and add below info into commit message and f2fs.rst?
"Actually, the default I/O priority of kernel thread is "4". So, we're going to raise this priority by one, because we want to give one higher priority for checkpointing thread than other normal threads. This is the same way to give a I/O priority to the jbd2 journaling thread of ext4 filesystem."
Otherwise this patch looks good to me.
Thanks,
| |