On 10/10, Yonggil Song wrote: > There was a problem that did not subtract the super block area when > calculating > the usable segments for a single zoned device with a conventional zone. > This resulted in incorrect the overprovision and reserved area. > > <256MiB legacy block + zoned block w/ 32MiB zone size> > Info: Overprovision ratio = 3.570% > Info: Overprovision segments = 656 (GC reserved = 560) > > <8 conventional zone + 1016 sequential zone w/ 32MiB zone size> > Info: Overprovision ratio = 3.700% > Info: Overprovision segments = 676 (GC reserved = 578) > > This patch addresses the problem by subtracting the super block area when > there is only one zoned device. > > Signed-off-by: Yonggil Song <yonggil.s...@samsung.com> > --- > lib/libf2fs_zoned.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/lib/libf2fs_zoned.c b/lib/libf2fs_zoned.c > index 89ba5ad73a76..1a0985378789 100644 > --- a/lib/libf2fs_zoned.c > +++ b/lib/libf2fs_zoned.c > @@ -555,6 +555,11 @@ uint32_t f2fs_get_usable_segments(struct > f2fs_super_block *sb) > } > usable_segs -= (get_sb(main_blkaddr) - get_sb(segment0_blkaddr)) >> > get_sb(log_blocks_per_seg); > + > + /* single zoned device needs to remove a super block area */ > + if (c.ndevs == 1 && c.devices[0].zoned_model == F2FS_ZONED_HM)
Does this work? > + usable_segs -= (get_sb(segment0_blkaddr) >> > get_sb(log_blocks_per_seg)); > + > return usable_segs; > #endif > return get_sb(segment_count_main); > -- > 2.43.0 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
