On Sun, Jan 28, 2024 at 5:27 PM Chao Yu <c...@kernel.org> wrote:
>
> On 2024/1/27 2:17, Daeho Jeong wrote:
> > On Thu, Jan 25, 2024 at 5:27 PM Chao Yu <c...@kernel.org> wrote:
> >>
> >> On 2024/1/26 0:25, Daeho Jeong wrote:
> >>> On Wed, Jan 24, 2024 at 7:34 PM Chao Yu <c...@kernel.org> wrote:
> >>>>
> >>>> +Cc Yongpeng Yang
> >>>>
> >>>> Daeho,
> >>>>
> >>>> Yongpeng reports a potential issue: if c.devices[0].total_segments is
> >>>> larger than segments of mainarea, c.cur_seg[CURSEG_HOT_NODE] will exceed
> >>>> end boundary of mainarea. Could you please check that? though it's a
> >>>> corner
> >>>> case.
> >>>
> >>> Can you elaborate more?
> >>
> >> Since c.cur_seg[CURSEG_HOT_NODE] is an offset started from main_blkaddr.
> >
> > Oh, Got it.
> > Then, how about this?
> >
> > c.cur_seg[CURSEG_HOT_NODE] = c.zoned_model == F2FS_ZONED_HM ?
> > (c.devices[1].start_blkaddr -
> > get_sb(main_blkaddr)) / c.blks_per_seg : 0;
>
> Better, but log header should align to start blkaddr of zone?
It's already aligned here.
if (c.zoned_mode && c.ndevs > 1)
zone_align_start_offset +=
(c.devices[0].total_sectors * c.sector_size) %
zone_size_bytes;
...
for (i = 0; i < c.ndevs; i++) {
if (i == 0) {
c.devices[i].total_segments =
(c.devices[i].total_sectors *
c.sector_size - zone_align_start_offset) /
segment_size_bytes;
c.devices[i].start_blkaddr = 0;
c.devices[i].end_blkaddr = c.devices[i].total_segments *
c.blks_per_seg - 1 +
sb->segment0_blkaddr;
} else {
c.devices[i].total_segments =
c.devices[i].total_sectors /
(c.sectors_per_blk * c.blks_per_seg);
c.devices[i].start_blkaddr =
c.devices[i - 1].end_blkaddr + 1;
...
total_meta_zones = ZONE_ALIGN(total_meta_segments *
c.blks_per_seg);
set_sb(main_blkaddr, get_sb(segment0_blkaddr) + total_meta_zones *
c.segs_per_zone * c.blks_per_seg);
>
> Thanks,
>
> >
> >> If c.cur_seg[CURSEG_HOT_NODE] was assigned w/ c.devices[0].total_segments,
> >> and c.devices[0].total_segments is larger than segments of mainare,
> >> c.cur_seg[CURSEG_HOT_NODE] will exceed the end boundary of mainarea.
> >>
> >> c.cur_seg[CURSEG_HOT_NODE] = c.zoned_model == F2FS_ZONED_HM ?
> >> c.devices[0].total_segments : 0;
> >>
> >>> In the case of F2FS_ZONED_HM, we have the devices[1].
> >>> Do you mean the case we format the filesystem intentionally smaller
> >>> than what devices have?
> >>
> >> I mean blew case:
> >> device[0]: conventional device size = 10240 MB
> >> device[1]: zone device size = 2 MB
> >>
> >> Thanks,
> >>
> >>>
> >>>>
> >>>> On 2024/1/18 7:00, Daeho Jeong wrote:
> >>>>> From: Daeho Jeong <daehoje...@google.com>
> >>>>>
> >>>>> Make to allocate logs after conventional area for HM zoned devices to
> >>>>> spare them for file pinning support.
> >>>>>
> >>>>> Signed-off-by: Daeho Jeong <daehoje...@google.com>
> >>>>> ---
> >>>>> mkfs/f2fs_format.c | 3 ++-
> >>>>> 1 file changed, 2 insertions(+), 1 deletion(-)
> >>>>>
> >>>>> diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c
> >>>>> index f2840c8..91a7f4b 100644
> >>>>> --- a/mkfs/f2fs_format.c
> >>>>> +++ b/mkfs/f2fs_format.c
> >>>>> @@ -557,7 +557,8 @@ static int f2fs_prepare_super_block(void)
> >>>>> c.cur_seg[CURSEG_COLD_DATA] = 0;
> >>>>> c.cur_seg[CURSEG_WARM_DATA] =
> >>>>> next_zone(CURSEG_COLD_DATA);
> >>>>> } else if (c.zoned_mode) {
> >>>>> - c.cur_seg[CURSEG_HOT_NODE] = 0;
> >>>>> + c.cur_seg[CURSEG_HOT_NODE] = c.zoned_model ==
> >>>>> F2FS_ZONED_HM ?
> >>>>> + c.devices[0].total_segments : 0;
> >>>>> c.cur_seg[CURSEG_WARM_NODE] =
> >>>>> next_zone(CURSEG_HOT_NODE);
> >>>>> c.cur_seg[CURSEG_COLD_NODE] =
> >>>>> next_zone(CURSEG_WARM_NODE);
> >>>>> c.cur_seg[CURSEG_HOT_DATA] =
> >>>>> next_zone(CURSEG_COLD_NODE);
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