diff options
author | Chao Yu <chao@kernel.org> | 2025-07-24 16:01:44 +0800 |
---|---|---|
committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2025-07-28 16:36:54 +0000 |
commit | 1005a3ca28e90c7a64fa43023f866b960a60f791 (patch) | |
tree | 4ffabb3f0717dd4eb32c78c4a158fb07445ae597 /scripts/gdb | |
parent | e194e140ab7de2ce2782e64b9e086a43ca6ff4f2 (diff) |
f2fs: fix to trigger foreground gc during f2fs_map_blocks() in lfs mode
w/ "mode=lfs" mount option, generic/299 will cause system panic as below:
------------[ cut here ]------------
kernel BUG at fs/f2fs/segment.c:2835!
Call Trace:
<TASK>
f2fs_allocate_data_block+0x6f4/0xc50
f2fs_map_blocks+0x970/0x1550
f2fs_iomap_begin+0xb2/0x1e0
iomap_iter+0x1d6/0x430
__iomap_dio_rw+0x208/0x9a0
f2fs_file_write_iter+0x6b3/0xfa0
aio_write+0x15d/0x2e0
io_submit_one+0x55e/0xab0
__x64_sys_io_submit+0xa5/0x230
do_syscall_64+0x84/0x2f0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0010:new_curseg+0x70f/0x720
The root cause of we run out-of-space is: in f2fs_map_blocks(), f2fs may
trigger foreground gc only if it allocates any physical block, it will be
a little bit later when there is multiple threads writing data w/
aio/dio/bufio method in parallel, since we always use OPU in lfs mode, so
f2fs_map_blocks() does block allocations aggressively.
In order to fix this issue, let's give a chance to trigger foreground
gc in prior to block allocation in f2fs_map_blocks().
Fixes: 36abef4e796d ("f2fs: introduce mode=lfs mount option")
Cc: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'scripts/gdb')
0 files changed, 0 insertions, 0 deletions