On 2022/6/20 6:34, Jaegeuk Kim wrote:
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?
However, in gc_thread_fun() victim_segno is NULL_SEGNO all the time.
I guess .should_migrate_blocks should only be set to true for
F2FS_IOC_FLUSH_DEVICE/F2FS_IOC_RESIZE_FS case? rather than GC_URGENT or GC_MID
case? See commit 7dede88659df ("f2fs: fix to allow migrating fully valid
segment").
Thanks,
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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