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Merge "f2fs: allow to change discard policy based on cached discard cmds"

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qctecmdr 2021-03-26 01:27:20 -07:00 • committed by Gerrit - the friendly Code Review server
commit dc5fcb928e
3 changed files with 11 additions and 1 deletions
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8
fs/f2fs/node.c
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@ -44,11 +44,15 @@ int f2fs_check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type)
{
struct f2fs_nm_info *nm_i = NM_I(sbi);
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct sysinfo val;
unsigned long avail_ram;
unsigned long mem_size = 0;
bool res = false;
if (!nm_i)
return true;
si_meminfo(&val);
/* only uses low memory */
@ -90,6 +94,10 @@ bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type)
/* it allows 20% / total_ram for inmemory pages */
mem_size = get_pages(sbi, F2FS_INMEM_PAGES);
res = mem_size < (val.totalram / 5);
} else if (type == DISCARD_CACHE) {
mem_size = (atomic_read(&dcc->discard_cmd_cnt) *
sizeof(struct discard_cmd)) >> PAGE_SHIFT;
res = mem_size < (avail_ram * nm_i->ram_thresh / 100);
} else {
if (!sbi->sb->s_bdi->wb.dirty_exceeded)
return true;

1
fs/f2fs/node.h
View file

@ -147,6 +147,7 @@ enum mem_type {
INO_ENTRIES, /* indicates inode entries */
EXTENT_CACHE, /* indicates extent cache */
INMEM_PAGES, /* indicates inmemory pages */
DISCARD_CACHE, /* indicates memory of cached discard cmds */
BASE_CHECK, /* check kernel status */
};

3
fs/f2fs/segment.c
View file

@ -1733,7 +1733,8 @@ static int issue_discard_thread(void *data)
continue;
}
if (sbi->gc_mode == GC_URGENT)
if (sbi->gc_mode == GC_URGENT ||
!f2fs_available_free_memory(sbi, DISCARD_CACHE))
__init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, 1);
sb_start_intwrite(sbi->sb);