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f2fs: support aligned pinned file

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This patch supports 2MB-aligned pinned file, which can guarantee no GC at all
by allocating fully valid 2MB segment.

Check free segments by has_not_enough_free_secs() with large budget.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2019-10-18 10:06:40 -07:00
parent bc005a4d53
commit f5a53edcf0
7 changed files with 73 additions and 11 deletions
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31
fs/f2fs/segment.c
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@@ -2690,7 +2690,7 @@ unlock:
up_read(&SM_I(sbi)->curseg_lock);
}
void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi, int type)
{
struct curseg_info *curseg;
unsigned int old_segno;
@@ -2699,10 +2699,17 @@ void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
down_write(&SIT_I(sbi)->sentry_lock);
for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
if (type != NO_CHECK_TYPE && i != type)
continue;
curseg = CURSEG_I(sbi, i);
old_segno = curseg->segno;
SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true);
locate_dirty_segment(sbi, old_segno);
if (type == NO_CHECK_TYPE || curseg->next_blkoff ||
get_valid_blocks(sbi, curseg->segno, false) ||
get_ckpt_valid_blocks(sbi, curseg->segno)) {
old_segno = curseg->segno;
SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true);
locate_dirty_segment(sbi, old_segno);
}
}
up_write(&SIT_I(sbi)->sentry_lock);
@@ -3068,6 +3075,19 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
{
struct sit_info *sit_i = SIT_I(sbi);
struct curseg_info *curseg = CURSEG_I(sbi, type);
bool put_pin_sem = false;
if (type == CURSEG_COLD_DATA) {
/* GC during CURSEG_COLD_DATA_PINNED allocation */
if (down_read_trylock(&sbi->pin_sem)) {
put_pin_sem = true;
} else {
type = CURSEG_WARM_DATA;
curseg = CURSEG_I(sbi, type);
}
} else if (type == CURSEG_COLD_DATA_PINNED) {
type = CURSEG_COLD_DATA;
}
down_read(&SM_I(sbi)->curseg_lock);
@@ -3133,6 +3153,9 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
mutex_unlock(&curseg->curseg_mutex);
up_read(&SM_I(sbi)->curseg_lock);
if (put_pin_sem)
up_read(&sbi->pin_sem);
}
static void update_device_state(struct f2fs_io_info *fio)