On 2017/10/14 20:34, Yunlong Song wrote:
> Do you mean check out-of-space test? I have tried that but no bugon.
Yes, test recent f2fs codes with kernel 4.13.0-rc1+ in VM, FYI:
kernel BUG at gc.c:1034!
invalid opcode: 0000 [#1] SMP
Hardware name: Xen HVM domU, BIOS 4.1.2_115-900.260_ 11/06/2015
RIP: 0010:f2fs_gc+0x6e5/0x6f0 [f2fs]
RSP: 0018:ffffc90004af7b40 EFLAGS: 00010202
RAX: ffff8801b0a15940 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8801b0a15940 RSI: ffff8801978d5f00 RDI: ffff880128148048
RBP: ffffc90004af7c38 R08: ffff8801978d5f00 R09: 0000000000000003
R10: 0000000000000003 R11: ffff8800060703a0 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8801b4279800
FS: 00007f23493cb740(0000) GS:ffff880216f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd05402ff8 CR3: 00000001bffb3000 CR4: 00000000001406e0
Call Trace:
f2fs_balance_fs+0x123/0x140 [f2fs]
f2fs_create+0x130/0x240 [f2fs]
path_openat+0xee7/0x1360
do_filp_open+0x7e/0xd0
do_sys_open+0x115/0x1f0
SyS_open+0x1e/0x20
do_syscall_64+0x6e/0x160
entry_SYSCALL64_slow_path+0x25/0x25
Thanks,
>
> On 2017/10/14 8:17, Chao Yu wrote:
>> On 2017/10/13 21:31, Yunlong Song wrote:
>>> This can help us to debug on some corner case.
>> I can hit this bugon with generic/015 of fstest easily, could have a look at
>> this?
>>
>> Thanks,
>>
>>> Signed-off-by: Yunlong Song <yunlong.s...@huawei.com>
>>> Signed-off-by: Chao Yu <yuch...@huawei.com>
>>> ---
>>> fs/f2fs/gc.c | 6 +++++-
>>> 1 file changed, 5 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
>>> index 197ebf4..2b03202 100644
>>> --- a/fs/f2fs/gc.c
>>> +++ b/fs/f2fs/gc.c
>>> @@ -986,6 +986,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
>>> .ilist = LIST_HEAD_INIT(gc_list.ilist),
>>> .iroot = RADIX_TREE_INIT(GFP_NOFS),
>>> };
>>> + bool need_fggc = false;
>>>
>>> trace_f2fs_gc_begin(sbi->sb, sync, background,
>>> get_pages(sbi, F2FS_DIRTY_NODES),
>>> @@ -1018,8 +1019,10 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
>>> if (ret)
>>> goto stop;
>>> }
>>> - if (has_not_enough_free_secs(sbi, 0, 0))
>>> + if (has_not_enough_free_secs(sbi, 0, 0)) {
>>> gc_type = FG_GC;
>>> + need_fggc = true;
>>> + }
>>> }
>>>
>>> /* f2fs_balance_fs doesn't need to do BG_GC in critical path. */
>>> @@ -1028,6 +1031,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
>>> goto stop;
>>> }
>>> if (!__get_victim(sbi, &segno, gc_type)) {
>>> + f2fs_bug_on(sbi, !total_freed && need_fggc);
>>> ret = -ENODATA;
>>> goto stop;
>>> }
>>>
>> .
>>
>
