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f2fs: allocate memory in batch in build_sit_info() 

build_sit_info() allocate all bitmaps for each segment one by one,
it's quite low efficiency, this pach changes to allocate large
continuous memory at a time, and divide it and assign for each bitmaps
of segment. For large size image, it can expect improving its mount
speed.

Signed-off-by: Chen Gong <gongchen4@huawei.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2019-07-26 15:41:20 +08:00 committed by Jaegeuk Kim
parent 4507847c86
commit 2fde3dd14e
2 changed files with 24 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
fs/f2fs/segment.c
View File

@ -3945,7 +3945,7 @@ static int build_sit_info(struct f2fs_sb_info *sbi)
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
struct sit_info *sit_i;
unsigned int sit_segs, start;
char *src_bitmap;
char *src_bitmap, *bitmap;
unsigned int bitmap_size;
/* allocate memory for SIT information */
@ -3968,27 +3968,31 @@ static int build_sit_info(struct f2fs_sb_info *sbi)
if (!sit_i->dirty_sentries_bitmap)
return -ENOMEM;
#ifdef CONFIG_F2FS_CHECK_FS
bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * 4;
#else
bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * 3;
#endif
sit_i->bitmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
if (!sit_i->bitmap)
return -ENOMEM;
bitmap = sit_i->bitmap;
for (start = 0; start < MAIN_SEGS(sbi); start++) {
sit_i->sentries[start].cur_valid_map
= f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
sit_i->sentries[start].ckpt_valid_map
= f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
if (!sit_i->sentries[start].cur_valid_map ||
!sit_i->sentries[start].ckpt_valid_map)
return -ENOMEM;
sit_i->sentries[start].cur_valid_map = bitmap;
bitmap += SIT_VBLOCK_MAP_SIZE;
sit_i->sentries[start].ckpt_valid_map = bitmap;
bitmap += SIT_VBLOCK_MAP_SIZE;
#ifdef CONFIG_F2FS_CHECK_FS
sit_i->sentries[start].cur_valid_map_mir
= f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
if (!sit_i->sentries[start].cur_valid_map_mir)
return -ENOMEM;
sit_i->sentries[start].cur_valid_map_mir = bitmap;
bitmap += SIT_VBLOCK_MAP_SIZE;
#endif
sit_i->sentries[start].discard_map
= f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE,
GFP_KERNEL);
if (!sit_i->sentries[start].discard_map)
return -ENOMEM;
sit_i->sentries[start].discard_map = bitmap;
bitmap += SIT_VBLOCK_MAP_SIZE;
}
sit_i->tmp_map = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
@ -4494,21 +4498,12 @@ static void destroy_free_segmap(struct f2fs_sb_info *sbi)
static void destroy_sit_info(struct f2fs_sb_info *sbi)
{
struct sit_info *sit_i = SIT_I(sbi);
unsigned int start;
if (!sit_i)
return;
if (sit_i->sentries) {
for (start = 0; start < MAIN_SEGS(sbi); start++) {
kvfree(sit_i->sentries[start].cur_valid_map);
#ifdef CONFIG_F2FS_CHECK_FS
kvfree(sit_i->sentries[start].cur_valid_map_mir);
#endif
kvfree(sit_i->sentries[start].ckpt_valid_map);
kvfree(sit_i->sentries[start].discard_map);
}
}
if (sit_i->sentries)
kvfree(sit_i->bitmap);
kvfree(sit_i->tmp_map);
kvfree(sit_i->sentries);

1
fs/f2fs/segment.h
View File

@ -226,6 +226,7 @@ struct sit_info {
block_t sit_base_addr; /* start block address of SIT area */
block_t sit_blocks; /* # of blocks used by SIT area */
block_t written_valid_blocks; /* # of valid blocks in main area */
char *bitmap; /* all bitmaps pointer */
char *sit_bitmap; /* SIT bitmap pointer */
#ifdef CONFIG_F2FS_CHECK_FS
char *sit_bitmap_mir; /* SIT bitmap mirror */