On 06/19, Chao Yu wrote:
> On 2022/6/18 6:31, Jaegeuk Kim wrote:
> > When users set GC_URGENT or GC_MID, they expected to do GCs right away.
> > But, there's a condition to bypass it. Let's indicate we need to do now
> > in the thread.
>
> .should_migrate_blocks is used to force migrating blocks in full
> section, so what is the condition here? GC should not never select
> a full section, right?
I think it'll move a full section given .victim_segno is not NULL_SEGNO,
as __get_victim will give a dirty segment all the time. wdyt?
>
> Thanks,
>
> >
> > Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
> > ---
> > fs/f2fs/gc.c | 8 ++++++--
> > 1 file changed, 6 insertions(+), 2 deletions(-)
> >
> > diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> > index d5fb426e0747..f4aa3c88118b 100644
> > --- a/fs/f2fs/gc.c
> > +++ b/fs/f2fs/gc.c
> > @@ -37,7 +37,6 @@ static int gc_thread_func(void *data)
> > unsigned int wait_ms;
> > struct f2fs_gc_control gc_control = {
> > .victim_segno = NULL_SEGNO,
> > - .should_migrate_blocks = false,
> > .err_gc_skipped = false };
> > wait_ms = gc_th->min_sleep_time;
> > @@ -113,7 +112,10 @@ static int gc_thread_func(void *data)
> > sbi->gc_mode == GC_URGENT_MID) {
> > wait_ms = gc_th->urgent_sleep_time;
> > f2fs_down_write(&sbi->gc_lock);
> > + gc_control.should_migrate_blocks = true;
> > goto do_gc;
> > + } else {
> > + gc_control.should_migrate_blocks = false;
> > }
> > if (foreground) {
> > @@ -139,7 +141,9 @@ static int gc_thread_func(void *data)
> > if (!foreground)
> > stat_inc_bggc_count(sbi->stat_info);
> > - sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC;
> > + sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC ||
> > + sbi->gc_mode == GC_URGENT_HIGH ||
> > + sbi->gc_mode == GC_URGENT_MID;
> > /* foreground GC was been triggered via f2fs_balance_fs() */
> > if (foreground)
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