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f2fs: fix equation of has_not_enough_free_secs() 

Practically, has_not_enough_free_secs() should calculate with the numbers of
current node and directory data blocks together.
Actually the equation was implemented in need_to_flush().

So, this patch removes need_flush() and moves the equation into
has_not_enough_free_secs().

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2012-12-21 17:20:21 +09:00
parent f58ad8f51a
commit 029cd28c1f
2 changed files with 16 additions and 35 deletions
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36
fs/f2fs/segment.c
View File

@ -19,48 +19,16 @@
#include "segment.h"
#include "node.h"
static int need_to_flush(struct f2fs_sb_info *sbi)
{
unsigned int pages_per_sec = (1 << sbi->log_blocks_per_seg) *
sbi->segs_per_sec;
int node_secs = ((get_pages(sbi, F2FS_DIRTY_NODES) + pages_per_sec - 1)
>> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
int dent_secs = ((get_pages(sbi, F2FS_DIRTY_DENTS) + pages_per_sec - 1)
>> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
if (sbi->por_doing)
return 0;
if (free_sections(sbi) <= (node_secs + 2 * dent_secs +
reserved_sections(sbi)))
return 1;
return 0;
}
/*
* This function balances dirty node and dentry pages.
* In addition, it controls garbage collection.
*/
void f2fs_balance_fs(struct f2fs_sb_info *sbi)
{
struct writeback_control wbc = {
.sync_mode = WB_SYNC_ALL,
.nr_to_write = LONG_MAX,
.for_reclaim = 0,
};
if (sbi->por_doing)
return;
/*
* We should do checkpoint when there are so many dirty node pages
* with enough free segments. After then, we should do GC.
* We should do GC or end up with checkpoint, if there are so many dirty
* dir/node pages without enough free segments.
*/
if (need_to_flush(sbi)) {
sync_dirty_dir_inodes(sbi);
sync_node_pages(sbi, 0, &wbc);
}
if (has_not_enough_free_secs(sbi)) {
mutex_lock(&sbi->gc_mutex);
f2fs_gc(sbi, 1);

15
fs/f2fs/segment.h
View File

@ -459,7 +459,20 @@ static inline int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi)
{
return free_sections(sbi) <= reserved_sections(sbi);
unsigned int pages_per_sec = (1 << sbi->log_blocks_per_seg) *
sbi->segs_per_sec;
int node_secs = ((get_pages(sbi, F2FS_DIRTY_NODES) + pages_per_sec - 1)
>> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
int dent_secs = ((get_pages(sbi, F2FS_DIRTY_DENTS) + pages_per_sec - 1)
>> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
if (sbi->por_doing)
return false;
if (free_sections(sbi) <= (node_secs + 2 * dent_secs +
reserved_sections(sbi)))
return true;
return false;
}
static inline int utilization(struct f2fs_sb_info *sbi)