Evolution-X-Devices/kernel_google_msm-4.14
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

f2fs: let discard thread wait a little longer if dev is busy

Browse Source 
This patch modify discard thread wait policy as below:
	issued       io_interrupted     wait time(ms)
1.        8                 0               50
2.      (0,8)               1               50
3.        0                 1              500 (dev is busy)
4.        0                 0            60000 (no candidates)

Change-Id: I7fc7b56f22f7a69fe7dba332a6482a173c4a9cc9
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Git-commit: f9d1dced7583607e066527ee23d804478870d197
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
This commit is contained in:
Yunlei He
2018-04-08 15:11:11 +08:00
committed by Sahitya Tummala
parent 786e83fbee
commit 39fe1cda39
2 changed files with 7 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/f2fs/f2fs.h
View File

@@ -180,6 +180,7 @@ enum {
#define DEF_MAX_DISCARD_REQUEST 8 /* issue 8 discards per round */
#define DEF_MAX_DISCARD_LEN 512 /* Max. 2MB per discard */
#define DEF_MIN_DISCARD_ISSUE_TIME 50 /* 50 ms, if exists */
#define DEF_MID_DISCARD_ISSUE_TIME 500 /* 500 ms, if device busy */
#define DEF_MAX_DISCARD_ISSUE_TIME 60000 /* 60 s, if no candidates */
#define DEF_DISCARD_URGENT_UTIL 80 /* do more discard over 80% */
#define DEF_CP_INTERVAL 60 /* 60 secs */
@@ -282,6 +283,7 @@ enum {
struct discard_policy {
int type; /* type of discard */
unsigned int min_interval; /* used for candidates exist */
unsigned int mid_interval; /* used for device busy */
unsigned int max_interval; /* used for candidates not exist */
unsigned int max_requests; /* # of discards issued per round */
unsigned int io_aware_gran; /* minimum granularity discard not be aware of I/O */

6
fs/f2fs/segment.c
View File

@@ -934,6 +934,7 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
if (discard_type == DPOLICY_BG) {
dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
dpolicy->mid_interval = DEF_MID_DISCARD_ISSUE_TIME;
dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
dpolicy->io_aware = true;
dpolicy->sync = false;
@@ -943,6 +944,7 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
}
} else if (discard_type == DPOLICY_FORCE) {
dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
dpolicy->mid_interval = DEF_MID_DISCARD_ISSUE_TIME;
dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
dpolicy->io_aware = false;
} else if (discard_type == DPOLICY_FSTRIM) {
@@ -1409,9 +1411,11 @@ static int issue_discard_thread(void *data)
sb_start_intwrite(sbi->sb);
issued = __issue_discard_cmd(sbi, &dpolicy);
if (issued) {
if (issued > 0) {
__wait_all_discard_cmd(sbi, &dpolicy);
wait_ms = dpolicy.min_interval;
} else if (issued == -1){
wait_ms = dpolicy.mid_interval;
} else {
wait_ms = dpolicy.max_interval;
}