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f2fs: do gc in greedy mode for whole range if gc_urgent mode is set 

Otherwise, f2fs conducts GC on 8GB range only based on slow cost-benefit.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2018-02-26 15:40:30 -08:00
parent dee02f0d62
commit b27bc8091c
1 changed files with 9 additions and 2 deletions
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11
fs/f2fs/gc.c
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@ -162,12 +162,17 @@ static int select_gc_type(struct f2fs_gc_kthread *gc_th, int gc_type)
{
int gc_mode = (gc_type == BG_GC) ? GC_CB : GC_GREEDY;
if (gc_th && gc_th->gc_idle) {
if (!gc_th)
return gc_mode;
if (gc_th->gc_idle) {
if (gc_th->gc_idle == 1)
gc_mode = GC_CB;
else if (gc_th->gc_idle == 2)
gc_mode = GC_GREEDY;
}
if (gc_th->gc_urgent)
gc_mode = GC_GREEDY;
return gc_mode;
}
@ -189,7 +194,9 @@ static void select_policy(struct f2fs_sb_info *sbi, int gc_type,
}
/* we need to check every dirty segments in the FG_GC case */
if (gc_type != FG_GC && p->max_search > sbi->max_victim_search)
if (gc_type != FG_GC &&
(sbi->gc_thread && !sbi->gc_thread->gc_urgent) &&
p->max_search > sbi->max_victim_search)
p->max_search = sbi->max_victim_search;
/* let's select beginning hot/small space first in no_heap mode*/