linux-toradex.git/fs/f2fs/gc.c, branch v4.9.120

f2fs: fix error path of move_data_page

2018-08-03T05:55:14+00:00

[ Upstream commit 14a28559f43ac7c0b98dd1b0e73ec9ec8ab4fc45 ]

This patch fixes error path of move_data_page:
- clear cold data flag if it fails to write page.
- redirty page for non-ENOMEM case.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

f2fs: relax node version check for victim data in gc

2018-03-22T08:17:45+00:00

[ Upstream commit c13ff37e359bb3eacf4e1760dcea8d9760aa7459 ]

- has_not_enough_free_secs
node_secs: 0  dent_secs: 0  freed:0  free_segments:103  reserved:104

          - f2fs_gc
             - get_victim_by_default
alloc_mode 0, gc_mode 1, max_search 2672, offset 4654, ofs_unit 1

                - do_garbage_collect
start_segno 3976, end_segno 3977   type 0

                  - is_alive
nid 22797, blkaddr 2131882, ofs_in_node 0, version 0x8/0x0

                   - gc_data_segment 766, segno 3976, block 512/426 not alive

So, this patch fixes subtle corrupted case where node version does not match
to summary version which results in infinite loop by gc.

Reported-by: Yunlei He 
Signed-off-by: Jaegeuk Kim 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

f2fs: add ovp valid_blocks check for bg gc victim to fg_gc

2017-03-12T05:41:51+00:00

commit e93b9865251a0503d83fd570e7d5a7c8bc351715 upstream.

For foreground gc, greedy algorithm should be adapted, which makes
this formula work well:

	(2 * (100 / config.overprovision + 1) + 6)

But currently, we fg_gc have a prior to select bg_gc victim segments to gc
first, these victims are selected by cost-benefit algorithm, we can't guarantee
such segments have the small valid blocks, which may destroy the f2fs rule, on
the worstest case, would consume all the free segments.

This patch fix this by add a filter in check_bg_victims, if segment's has # of
valid blocks over overprovision ratio, skip such segments.

Signed-off-by: Hou Pengyang 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim 
Signed-off-by: Greg Kroah-Hartman

f2fs: fix wrong sum_page pointer in f2fs_gc

2016-10-12T23:23:36+00:00

This patch fixes using a wrong pointer for sum_page in f2fs_gc.

Signed-off-by: Jaegeuk Kim

f2fs: remove dead variable

2016-10-01T00:34:37+00:00

Signed-off-by: Sheng Yong 
Acked-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: support checkpoint error injection

2016-10-01T00:34:35+00:00

This patch adds to support checkpoint error injection in f2fs for testing
fatal error tolerance, it will be useful that it can simulate abnormal
power off by f2fs itself instead of calling godown ioctl by running apps.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: support configuring fault injection per superblock

2016-10-01T00:34:31+00:00

Previously, we only support global fault injection configuration, so that
when we configure type/rate of fault injection through sysfs, mount
option, it will influence all f2fs partition which is being used.

It is not make sence, since it will be not convenient if developer want
to test separated partitions with different fault injection rate/type
simultaneously, also it's not possible to enable fault injection in one
partition and disable fault injection in other one.

>From now on, we move global configuration of fault injection in module
into per-superblock, hence injection testing can be more flexible.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: avoid gc in cp_error case

2016-10-01T00:34:26+00:00

Otherwise, we can hit
	f2fs_bug_on(sbi, !PageUptodate(sum_page));

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: should put_page for summary page

2016-10-01T00:34:25+00:00

We should call put_page for preloaded summary pages in do_garbage_collect.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: assign return value in f2fs_gc

2016-10-01T00:34:24+00:00

This patch adds a return value of write_checkpoint for f2fs_gc.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim