user/sven/linux.git/fs/f2fs/debug.c, branch v5.15.2

f2fs: convert S_IRUGO to 0444

2021-08-17T18:59:05Z

To fix: WARNING: Symbolic permissions 'S_IRUGO' are not preferred. Consider using octal permissions '0444'. Signed-off-by: Yangtao Li Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: improve sbi status info in debugfs/f2fs/status

2021-08-13T18:57:02Z

Do not use numbers but strings to improve readability when flag is set. Signed-off-by: Yangtao Li Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: show sbi status in debugfs/f2fs/status

2021-08-02T18:24:26Z

We need to get sbi->s_flag to understand the current f2fs status as well. One example is SBI_NEED_FSCK. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: add sysfs nodes to get GC info for each GC mode

2021-07-13T23:09:55Z

Added gc_reclaimed_segments and gc_segment_mode sysfs nodes. 1) "gc_reclaimed_segments" shows how many segments have been reclaimed by GC during a specific GC mode. 2) "gc_segment_mode" is used to control for which gc mode the "gc_reclaimed_segments" node shows. Signed-off-by: Daeho Jeong Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: compress: add compress_inode to cache compressed blocks

2021-06-23T08:09:35Z

Support to use address space of inner inode to cache compressed block, in order to improve cache hit ratio of random read. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: clean up build warnings

2021-04-10T17:36:39Z

This patch combined the below three clean-up patches. - modify open brace '{' following function definitions - ERROR: spaces required around that ':' - ERROR: spaces required before the open parenthesis '(' - ERROR: spaces prohibited before that ',' - Made suggested modifications from checkpatch in reference to WARNING: Missing a blank line after declarations Signed-off-by: Yi Zhuang Signed-off-by: Jia Yang Signed-off-by: Jack Qiu Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: introduce checkpoint_merge mount option

2021-02-03T21:03:06Z

We've added a new mount options, "checkpoint_merge" and "nocheckpoint_merge", which creates a kernel daemon and makes it to merge concurrent checkpoint requests as much as possible to eliminate redundant checkpoint issues. Plus, we can eliminate the sluggish issue caused by slow checkpoint operation when the checkpoint is done in a process context in a cgroup having low i/o budget and cpu shares. To make this do better, we set the default i/o priority of the kernel daemon to "3", to give one higher priority than other kernel threads. The below verification result explains this. The basic idea has come from https://opensource.samsung.com. [Verification] Android Pixel Device(ARM64, 7GB RAM, 256GB UFS) Create two I/O cgroups (fg w/ weight 100, bg w/ wight 20) Set "strict_guarantees" to "1" in BFQ tunables In "fg" cgroup, - thread A => trigger 1000 checkpoint operations "for i in `seq 1 1000`; do touch test_dir1/file; fsync test_dir1; done" - thread B => gererating async. I/O "fio --rw=write --numjobs=1 --bs=128k --runtime=3600 --time_based=1 --filename=test_img --name=test" In "bg" cgroup, - thread C => trigger repeated checkpoint operations "echo $$ > /dev/blkio/bg/tasks; while true; do touch test_dir2/file; fsync test_dir2; done" We've measured thread A's execution time. [ w/o patch ] Elapsed Time: Avg. 68 seconds [ w/ patch ] Elapsed Time: Avg. 48 seconds Reported-by: kernel test robot Reported-by: Dan Carpenter [Jaegeuk Kim: fix the return value in f2fs_start_ckpt_thread, reported by Dan] Signed-off-by: Daeho Jeong Signed-off-by: Sungjong Seo Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: avoid race condition for shrinker count

2020-12-03T08:59:26Z

Light reported sometimes shinker gets nat_cnt < dirty_nat_cnt resulting in wrong do_shinker work. Let's avoid to return insane overflowed value by adding single tracking value. Reported-by: Light Hsieh Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: clean up kvfree

2020-09-14T18:15:37Z

After commit 0b6d4ca04a86 ("f2fs: don't return vmalloc() memory from f2fs_kmalloc()"), f2fs_k{m,z}alloc() will not return vmalloc()'ed memory, so clean up to use kfree() instead of kvfree() to free vmalloc()'ed memory. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: change compr_blocks of superblock info to 64bit

2020-09-11T18:11:25Z

Current compr_blocks of superblock info is not 64bit value. We are accumulating each i_compr_blocks count of inodes to this value and those are 64bit values. So, need to change this to 64bit value. Signed-off-by: Daeho Jeong Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim