On Wed, Aug 2, 2023 at 1:43 AM Miklos Szeredi <miklos@xxxxxxxxxx> wrote: > > On Thu, 20 Jul 2023 at 11:15, Yunlong Xing <yunlong.xing@xxxxxxxxxx> wrote: > > > > The current ovlfs mount flow: > > > > ovl_fill_super > > |_ovl_get_workdir > > |_ovl_make_workdir > > |_ovl_check_rename_whiteout > > > > In ovl_check_rename_whiteout(), a new file is attempted to create.But if > > the upper doesn't have space to do this, it will return error -ENOSPC, > > causing the mount fail. It means that if the upper is full, the overlayfs > > cannot be mounted. It is not reasonable, so this patch will omit this error > > and continue mount flow. > > Wouldn't mounting without upper (two or more lower layers) work in this case? Sorry miklos， I don't understand what you mean. The case is in "ovl_make_workdir" flow, "ovl_check_rename_whiteout" will attempt to create a temp file. The "upper" partition（e.g scratch partition）is completely full，the create will fail. So, the overlay mounting will failed > > Thanks, > Miklos
