On 01/29, Chao Yu wrote:
> On 2018/1/29 16:31, Yunlong Song wrote:
> > The old commit allocates hot data & nodes in the beginning of partition
> > both for heap and
> > noheap mode. But from the commit message, the heap mode should be like
> > before, i.e.,
> > allocate hot data & nodes from curseg to left.
>
> Let's ping Jaegeuk to check that, :)
Yup, I missed to add this condition. :)
>
> Thanks,
>
> >
> > On 2018/1/29 16:12, Chao Yu wrote:
> >> Hi Yunlong,
> >>
> >> On 2018/1/29 11:37, Yunlong Song wrote:
> >>> Commit 7a20b8a61eff81bdb7097a578752a74860e9d142 ("f2fs: allocate node
> >>> and hot data in the beginning of partition") introduces another mount
> >>> option, heap, to reset it back. But it does not do anything for heap
> >>> mode, so fix it.
> >> I think Jaegeuk did three things in that patch:
> >> a) add missing heap mount option handling in ->show_options.
> >> b) set noheap by default.
> >> c) change allocation policy to the one that allocate hotdata & nodes in the
> >> front of main are intensively.
> >>
> >> They could be separated, independent, and I don't see such intention that
> >> we can only use c) the new introduced allocation policy in noheap mode.
> >>
> >> Anyway, I think Jaegeuk can help to double check that.
> >>
> >> Thanks,
> >>
> >>> Signed-off-by: Yunlong Song <yunlong.song@xxxxxxxxxx>
> >>> ---
> >>> fs/f2fs/gc.c | 5 +++--
> >>> fs/f2fs/segment.c | 3 ++-
> >>> 2 files changed, 5 insertions(+), 3 deletions(-)
> >>>
> >>> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> >>> index aa720cc..b9d93fd 100644
> >>> --- a/fs/f2fs/gc.c
> >>> +++ b/fs/f2fs/gc.c
> >>> @@ -191,8 +191,9 @@ static void select_policy(struct f2fs_sb_info *sbi, int gc_type,
> >>> if (gc_type != FG_GC && p->max_search > sbi->max_victim_search)
> >>> p->max_search = sbi->max_victim_search;
> >>>
> >>> - /* let's select beginning hot/small space first */
> >>> - if (type == CURSEG_HOT_DATA || IS_NODESEG(type))
> >>> + /* let's select beginning hot/small space first in no_heap mode*/
> >>> + if (test_opt(sbi, NOHEAP) &&
> >>> + (type == CURSEG_HOT_DATA || IS_NODESEG(type)))
> >>> p->offset = 0;
> >>> else
> >>> p->offset = SIT_I(sbi)->last_victim[p->gc_mode];
> >>> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> >>> index e5739ce..77a48c4 100644
> >>> --- a/fs/f2fs/segment.c
> >>> +++ b/fs/f2fs/segment.c
> >>> @@ -2167,7 +2167,8 @@ static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
> >>> if (sbi->segs_per_sec != 1)
> >>> return CURSEG_I(sbi, type)->segno;
> >>>
> >>> - if (type == CURSEG_HOT_DATA || IS_NODESEG(type))
> >>> + if (test_opt(sbi, NOHEAP) &&
> >>> + (type == CURSEG_HOT_DATA || IS_NODESEG(type)))
> >>> return 0;
> >>>
> >>> if (SIT_I(sbi)->last_victim[ALLOC_NEXT])
> >>>
> >>
> >> .
> >>
> >
