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Message-ID: <a2c4e03c-e137-887f-bd7a-fdacffcb1ee9@kernel.org>
Date: Wed, 13 Jul 2022 10:15:37 +0800
From: Chao Yu <chao@...nel.org>
To: Matteo Croce <mcroce@...ux.microsoft.com>
Cc: jaegeuk@...nel.org, linux-kernel@...r.kernel.org,
stable@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
Ming Yan <yanming@....edu.cn>
Subject: Re: [f2fs-dev] [PATCH v4] f2fs: fix to do sanity check on
total_data_blocks
On 2022/7/13 7:22, Matteo Croce wrote:
> On Fri, 6 May 2022 09:33:06 +0800
> Chao Yu <chao@...nel.org> wrote:
>
>> As Yanming reported in bugzilla:
>>
>> https://bugzilla.kernel.org/show_bug.cgi?id=215916
>>
>> The kernel message is shown below:
>>
>> kernel BUG at fs/f2fs/segment.c:2560!
>> Call Trace:
>> allocate_segment_by_default+0x228/0x440
>> f2fs_allocate_data_block+0x13d1/0x31f0
>> do_write_page+0x18d/0x710
>> f2fs_outplace_write_data+0x151/0x250
>> f2fs_do_write_data_page+0xef9/0x1980
>> move_data_page+0x6af/0xbc0
>> do_garbage_collect+0x312f/0x46f0
>> f2fs_gc+0x6b0/0x3bc0
>> f2fs_balance_fs+0x921/0x2260
>> f2fs_write_single_data_page+0x16be/0x2370
>> f2fs_write_cache_pages+0x428/0xd00
>> f2fs_write_data_pages+0x96e/0xd50
>> do_writepages+0x168/0x550
>> __writeback_single_inode+0x9f/0x870
>> writeback_sb_inodes+0x47d/0xb20
>> __writeback_inodes_wb+0xb2/0x200
>> wb_writeback+0x4bd/0x660
>> wb_workfn+0x5f3/0xab0
>> process_one_work+0x79f/0x13e0
>> worker_thread+0x89/0xf60
>> kthread+0x26a/0x300
>> ret_from_fork+0x22/0x30
>> RIP: 0010:new_curseg+0xe8d/0x15f0
>>
>> The root cause is: ckpt.valid_block_count is inconsistent with SIT
>> table, stat info indicates filesystem has free blocks, but SIT table
>> indicates filesystem has no free segment.
>>
>> So that during garbage colloection, it triggers panic when LFS
>> allocator fails to find free segment.
>>
>> This patch tries to fix this issue by checking consistency in between
>> ckpt.valid_block_count and block accounted from SIT.
>>
>> Cc: stable@...r.kernel.org
>> Reported-by: Ming Yan <yanming@....edu.cn>
>> Signed-off-by: Chao Yu <chao.yu@...o.com>
>> ---
>> v4:
>> - fix to set data/node type correctly.
>> fs/f2fs/segment.c | 37 ++++++++++++++++++++++++++-----------
>> 1 file changed, 26 insertions(+), 11 deletions(-)
>>
>> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
>> index 3a3e2cec2ac4..4735d477059d 100644
>> --- a/fs/f2fs/segment.c
>> +++ b/fs/f2fs/segment.c
>> @@ -4461,7 +4461,8 @@ static int build_sit_entries(struct
>> f2fs_sb_info *sbi) unsigned int i, start, end;
>> unsigned int readed, start_blk = 0;
>> int err = 0;
>> - block_t total_node_blocks = 0;
>> + block_t sit_valid_blocks[2] = {0, 0};
>> + int type;
>>
>> do {
>> readed = f2fs_ra_meta_pages(sbi, start_blk,
>> BIO_MAX_VECS, @@ -4486,8 +4487,9 @@ static int
>> build_sit_entries(struct f2fs_sb_info *sbi) if (err)
>> return err;
>> seg_info_from_raw_sit(se, &sit);
>> - if (IS_NODESEG(se->type))
>> - total_node_blocks +=
>> se->valid_blocks; +
>> + type = IS_NODESEG(se->type) ? NODE : DATA;
>> + sit_valid_blocks[type] += se->valid_blocks;
>>
>> if (f2fs_block_unit_discard(sbi)) {
>> /* build discard map only one time */
>> @@ -4527,15 +4529,17 @@ static int build_sit_entries(struct
>> f2fs_sb_info *sbi) sit = sit_in_journal(journal, i);
>>
>> old_valid_blocks = se->valid_blocks;
>> - if (IS_NODESEG(se->type))
>> - total_node_blocks -= old_valid_blocks;
>> +
>> + type = IS_NODESEG(se->type) ? NODE : DATA;
>> + sit_valid_blocks[type] -= old_valid_blocks;
>>
>> err = check_block_count(sbi, start, &sit);
>> if (err)
>> break;
>> seg_info_from_raw_sit(se, &sit);
>> - if (IS_NODESEG(se->type))
>> - total_node_blocks += se->valid_blocks;
>> +
>> + type = IS_NODESEG(se->type) ? NODE : DATA;
>> + sit_valid_blocks[type] += se->valid_blocks;
>>
>> if (f2fs_block_unit_discard(sbi)) {
>> if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG))
>> { @@ -4557,13 +4561,24 @@ static int build_sit_entries(struct
>> f2fs_sb_info *sbi) }
>> up_read(&curseg->journal_rwsem);
>>
>> - if (!err && total_node_blocks != valid_node_count(sbi)) {
>> + if (err)
>> + return err;
>> +
>> + if (sit_valid_blocks[NODE] != valid_node_count(sbi)) {
>> f2fs_err(sbi, "SIT is corrupted node# %u vs %u",
>> - total_node_blocks, valid_node_count(sbi));
>> - err = -EFSCORRUPTED;
>> + sit_valid_blocks[NODE],
>> valid_node_count(sbi));
>> + return -EFSCORRUPTED;
>> }
>>
>> - return err;
>> + if (sit_valid_blocks[DATA] + sit_valid_blocks[NODE] >
>> + valid_user_blocks(sbi)) {
>> + f2fs_err(sbi, "SIT is corrupted data# %u %u vs %u",
>> + sit_valid_blocks[DATA],
>> sit_valid_blocks[NODE],
>> + valid_user_blocks(sbi));
>> + return -EFSCORRUPTED;
>> + }
>> +
>> + return 0;
>> }
>>
>> static void init_free_segmap(struct f2fs_sb_info *sbi)
>
> Hi all,
>
> I'm experiencing this with kernel 5.18.5:
Hi Matteo,
It looks in your attached log there is no similar stack as below?
>> kernel BUG at fs/f2fs/segment.c:2560!
>> Call Trace:
>> allocate_segment_by_default+0x228/0x440
>> f2fs_allocate_data_block+0x13d1/0x31f0
>> do_write_page+0x18d/0x710
Could you please check cpu usage when the bug reproduces?
Thanks,
>
> [1774085.200363] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774085.206139] rcu: 1-....: (2099 ticks this GP) idle=a7f/1/0x4000000000000000 softirq=6435692/6435692 fqs=977
> [1774085.216272] (t=2101 jiffies g=30461565 q=289)
> [1774085.216276] Task dump for CPU 1:
> [1774085.216278] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774085.216285] Call trace:
> [1774085.216287] dump_backtrace.part.0+0xb4/0xc0
> [1774085.216299] show_stack+0x14/0x30
> [1774085.216304] sched_show_task+0x130/0x160
> [1774085.216309] dump_cpu_task+0x40/0x4c
> [1774085.216313] rcu_dump_cpu_stacks+0xec/0x130
> [1774085.216317] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774085.216321] update_process_times+0x98/0x180
> [1774085.216324] tick_sched_timer+0x54/0xd0
> [1774085.216329] __hrtimer_run_queues+0x134/0x2d0
> [1774085.216333] hrtimer_interrupt+0x110/0x2c0
> [1774085.216336] arch_timer_handler_phys+0x28/0x40
> [1774085.216342] handle_percpu_devid_irq+0x84/0x1c0
> [1774085.216348] generic_handle_domain_irq+0x28/0x40
> [1774085.216352] gic_handle_irq+0x58/0x80
> [1774085.216357] call_on_irq_stack+0x2c/0x3c
> [1774085.216360] do_interrupt_handler+0x78/0x84
> [1774085.216364] el1_interrupt+0x30/0x50
> [1774085.216368] el1h_64_irq_handler+0x14/0x20
> [1774085.216371] el1h_64_irq+0x64/0x68
> [1774085.216374] __filemap_get_folio+0xa0/0x3b0
> [1774085.216378] pagecache_get_page+0x18/0x70
> [1774085.216383] grab_cache_page_write_begin+0x20/0x30
> [1774085.216388] f2fs_get_read_data_page+0x3c/0x480
> [1774085.216392] f2fs_get_lock_data_page+0x3c/0x260
> [1774085.216395] move_data_page+0x34/0x530
> [1774085.216398] do_garbage_collect+0xc54/0x12e0
> [1774085.216401] f2fs_gc+0x3b4/0x800
> [1774085.216404] gc_thread_func+0x4c8/0x640
> [1774085.216407] kthread+0xd0/0xe0
> [1774085.216411] ret_from_fork+0x10/0x20
> [1774115.558533] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774115.564309] rcu: 1-....: (2099 ticks this GP) idle=be7/1/0x4000000000000000 softirq=6435694/6435694 fqs=1016
> [1774115.574528] (t=2101 jiffies g=30461569 q=847)
> [1774115.574532] Task dump for CPU 1:
> [1774115.574534] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774115.574541] Call trace:
> [1774115.574543] dump_backtrace.part.0+0xb4/0xc0
> [1774115.574555] show_stack+0x14/0x30
> [1774115.574559] sched_show_task+0x130/0x160
> [1774115.574564] dump_cpu_task+0x40/0x4c
> [1774115.574569] rcu_dump_cpu_stacks+0xec/0x130
> [1774115.574572] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774115.574576] update_process_times+0x98/0x180
> [1774115.574580] tick_sched_timer+0x54/0xd0
> [1774115.574584] __hrtimer_run_queues+0x134/0x2d0
> [1774115.574587] hrtimer_interrupt+0x110/0x2c0
> [1774115.574590] arch_timer_handler_phys+0x28/0x40
> [1774115.574596] handle_percpu_devid_irq+0x84/0x1c0
> [1774115.574603] generic_handle_domain_irq+0x28/0x40
> [1774115.574606] gic_handle_irq+0x58/0x80
> [1774115.574611] call_on_irq_stack+0x2c/0x3c
> [1774115.574615] do_interrupt_handler+0x78/0x84
> [1774115.574618] el1_interrupt+0x30/0x50
> [1774115.574623] el1h_64_irq_handler+0x14/0x20
> [1774115.574626] el1h_64_irq+0x64/0x68
> [1774115.574629] f2fs_is_valid_blkaddr+0x184/0x310
> [1774115.574633] f2fs_get_read_data_page+0x80/0x480
> [1774115.574637] f2fs_get_lock_data_page+0x3c/0x260
> [1774115.574640] move_data_page+0x34/0x530
> [1774115.574643] do_garbage_collect+0xc54/0x12e0
> [1774115.574646] f2fs_gc+0x3b4/0x800
> [1774115.574649] gc_thread_func+0x4c8/0x640
> [1774115.574652] kthread+0xd0/0xe0
> [1774115.574655] ret_from_fork+0x10/0x20
> [1774178.604732] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774178.610507] rcu: 1-....: (8404 ticks this GP) idle=be7/1/0x4000000000000000 softirq=6435694/6435694 fqs=3918
> [1774178.620727] (t=8406 jiffies g=30461569 q=2117)
> [1774178.620730] Task dump for CPU 1:
> [1774178.620732] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774178.620739] Call trace:
> [1774178.620741] dump_backtrace.part.0+0xb4/0xc0
> [1774178.620750] show_stack+0x14/0x30
> [1774178.620754] sched_show_task+0x130/0x160
> [1774178.620762] dump_cpu_task+0x40/0x4c
> [1774178.620766] rcu_dump_cpu_stacks+0xec/0x130
> [1774178.620769] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774178.620774] update_process_times+0x98/0x180
> [1774178.620777] tick_sched_timer+0x54/0xd0
> [1774178.620781] __hrtimer_run_queues+0x134/0x2d0
> [1774178.620785] hrtimer_interrupt+0x110/0x2c0
> [1774178.620788] arch_timer_handler_phys+0x28/0x40
> [1774178.620793] handle_percpu_devid_irq+0x84/0x1c0
> [1774178.620798] generic_handle_domain_irq+0x28/0x40
> [1774178.620801] gic_handle_irq+0x58/0x80
> [1774178.620806] call_on_irq_stack+0x2c/0x3c
> [1774178.620810] do_interrupt_handler+0x78/0x84
> [1774178.620813] el1_interrupt+0x30/0x50
> [1774178.620818] el1h_64_irq_handler+0x14/0x20
> [1774178.620821] el1h_64_irq+0x64/0x68
> [1774178.620823] f2fs_lookup_extent_cache+0x18c/0x310
> [1774178.620828] f2fs_get_read_data_page+0x54/0x480
> [1774178.620832] f2fs_get_lock_data_page+0x3c/0x260
> [1774178.620835] move_data_page+0x34/0x530
> [1774178.620838] do_garbage_collect+0xc54/0x12e0
> [1774178.620842] f2fs_gc+0x3b4/0x800
> [1774178.620844] gc_thread_func+0x4c8/0x640
> [1774178.620848] kthread+0xd0/0xe0
> [1774178.620851] ret_from_fork+0x10/0x20
> [1774260.049828] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774260.055605] rcu: 0-....: (2099 ticks this GP) idle=915/1/0x4000000000000000 softirq=6031130/6031130 fqs=1015
> [1774260.065826] (t=2101 jiffies g=30461577 q=931)
> [1774260.065830] Task dump for CPU 0:
> [1774260.065832] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774260.065839] Call trace:
> [1774260.065841] dump_backtrace.part.0+0xb4/0xc0
> [1774260.065854] show_stack+0x14/0x30
> [1774260.065858] sched_show_task+0x130/0x160
> [1774260.065863] dump_cpu_task+0x40/0x4c
> [1774260.065868] rcu_dump_cpu_stacks+0xec/0x130
> [1774260.065871] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774260.065875] update_process_times+0x98/0x180
> [1774260.065879] tick_sched_timer+0x54/0xd0
> [1774260.065883] __hrtimer_run_queues+0x134/0x2d0
> [1774260.065887] hrtimer_interrupt+0x110/0x2c0
> [1774260.065890] arch_timer_handler_phys+0x28/0x40
> [1774260.065896] handle_percpu_devid_irq+0x84/0x1c0
> [1774260.065901] generic_handle_domain_irq+0x28/0x40
> [1774260.065904] gic_handle_irq+0x58/0x80
> [1774260.065909] call_on_irq_stack+0x2c/0x3c
> [1774260.065913] do_interrupt_handler+0x78/0x84
> [1774260.065916] el1_interrupt+0x30/0x50
> [1774260.065922] el1h_64_irq_handler+0x14/0x20
> [1774260.065925] el1h_64_irq+0x64/0x68
> [1774260.065928] folio_wait_stable+0x8/0x30
> [1774260.065933] pagecache_get_page+0x18/0x70
> [1774260.065938] grab_cache_page_write_begin+0x20/0x30
> [1774260.065943] f2fs_get_read_data_page+0x3c/0x480
> [1774260.065947] f2fs_get_lock_data_page+0x3c/0x260
> [1774260.065950] move_data_page+0x34/0x530
> [1774260.065954] do_garbage_collect+0xc54/0x12e0
> [1774260.065957] f2fs_gc+0x3b4/0x800
> [1774260.065960] gc_thread_func+0x4c8/0x640
> [1774260.065963] kthread+0xd0/0xe0
> [1774260.065966] ret_from_fork+0x10/0x20
> [1774323.086033] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774323.091808] rcu: 0-....: (8403 ticks this GP) idle=915/1/0x4000000000000000 softirq=6031130/6031130 fqs=4088
> [1774323.102028] (t=8405 jiffies g=30461577 q=1422)
> [1774323.102031] Task dump for CPU 0:
> [1774323.102033] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774323.102040] Call trace:
> [1774323.102042] dump_backtrace.part.0+0xb4/0xc0
> [1774323.102052] show_stack+0x14/0x30
> [1774323.102055] sched_show_task+0x130/0x160
> [1774323.102060] dump_cpu_task+0x40/0x4c
> [1774323.102065] rcu_dump_cpu_stacks+0xec/0x130
> [1774323.102068] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774323.102073] update_process_times+0x98/0x180
> [1774323.102076] tick_sched_timer+0x54/0xd0
> [1774323.102080] __hrtimer_run_queues+0x134/0x2d0
> [1774323.102084] hrtimer_interrupt+0x110/0x2c0
> [1774323.102087] arch_timer_handler_phys+0x28/0x40
> [1774323.102092] handle_percpu_devid_irq+0x84/0x1c0
> [1774323.102097] generic_handle_domain_irq+0x28/0x40
> [1774323.102100] gic_handle_irq+0x58/0x80
> [1774323.102105] call_on_irq_stack+0x2c/0x3c
> [1774323.102109] do_interrupt_handler+0x78/0x84
> [1774323.102112] el1_interrupt+0x30/0x50
> [1774323.102118] el1h_64_irq_handler+0x14/0x20
> [1774323.102120] el1h_64_irq+0x64/0x68
> [1774323.102123] folio_unlock+0x8/0x40
> [1774323.102127] f2fs_get_lock_data_page+0xf4/0x260
> [1774323.102131] move_data_page+0x34/0x530
> [1774323.102135] do_garbage_collect+0xc54/0x12e0
> [1774323.102138] f2fs_gc+0x3b4/0x800
> [1774323.102141] gc_thread_func+0x4c8/0x640
> [1774323.102144] kthread+0xd0/0xe0
> [1774323.102147] ret_from_fork+0x10/0x20
> [1774386.122242] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774386.128015] rcu: 0-....: (14707 ticks this GP) idle=915/1/0x4000000000000000 softirq=6031130/6031130 fqs=7133
> [1774386.138322] (t=14709 jiffies g=30461577 q=1895)
> [1774386.138325] Task dump for CPU 0:
> [1774386.138327] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774386.138334] Call trace:
> [1774386.138335] dump_backtrace.part.0+0xb4/0xc0
> [1774386.138345] show_stack+0x14/0x30
> [1774386.138349] sched_show_task+0x130/0x160
> [1774386.138354] dump_cpu_task+0x40/0x4c
> [1774386.138358] rcu_dump_cpu_stacks+0xec/0x130
> [1774386.138361] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774386.138365] update_process_times+0x98/0x180
> [1774386.138369] tick_sched_timer+0x54/0xd0
> [1774386.138373] __hrtimer_run_queues+0x134/0x2d0
> [1774386.138376] hrtimer_interrupt+0x110/0x2c0
> [1774386.138380] arch_timer_handler_phys+0x28/0x40
> [1774386.138384] handle_percpu_devid_irq+0x84/0x1c0
> [1774386.138389] generic_handle_domain_irq+0x28/0x40
> [1774386.138393] gic_handle_irq+0x58/0x80
> [1774386.138397] call_on_irq_stack+0x2c/0x3c
> [1774386.138401] do_interrupt_handler+0x78/0x84
> [1774386.138405] el1_interrupt+0x30/0x50
> [1774386.138410] el1h_64_irq_handler+0x14/0x20
> [1774386.138413] el1h_64_irq+0x64/0x68
> [1774386.138416] f2fs_lookup_extent_cache+0x18c/0x310
> [1774386.138420] f2fs_get_read_data_page+0x54/0x480
> [1774386.138424] f2fs_get_lock_data_page+0x3c/0x260
> [1774386.138427] move_data_page+0x34/0x530
> [1774386.138431] do_garbage_collect+0xc54/0x12e0
> [1774386.138434] f2fs_gc+0x3b4/0x800
> [1774386.138437] gc_thread_func+0x4c8/0x640
> [1774386.138440] kthread+0xd0/0xe0
> [1774386.138443] ret_from_fork+0x10/0x20
> [1774449.158452] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774449.164226] rcu: 0-....: (21011 ticks this GP) idle=915/1/0x4000000000000000 softirq=6031130/6031130 fqs=10163
> [1774449.174619] (t=21013 jiffies g=30461577 q=2392)
> [1774449.174622] Task dump for CPU 0:
> [1774449.174624] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774449.174630] Call trace:
> [1774449.174632] dump_backtrace.part.0+0xb4/0xc0
> [1774449.174641] show_stack+0x14/0x30
> [1774449.174645] sched_show_task+0x130/0x160
> [1774449.174650] dump_cpu_task+0x40/0x4c
> [1774449.174654] rcu_dump_cpu_stacks+0xec/0x130
> [1774449.174657] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774449.174661] update_process_times+0x98/0x180
> [1774449.174664] tick_sched_timer+0x54/0xd0
> [1774449.174668] __hrtimer_run_queues+0x134/0x2d0
> [1774449.174672] hrtimer_interrupt+0x110/0x2c0
> [1774449.174675] arch_timer_handler_phys+0x28/0x40
> [1774449.174680] handle_percpu_devid_irq+0x84/0x1c0
> [1774449.174685] generic_handle_domain_irq+0x28/0x40
> [1774449.174688] gic_handle_irq+0x58/0x80
> [1774449.174693] call_on_irq_stack+0x2c/0x3c
> [1774449.174696] do_interrupt_handler+0x78/0x84
> [1774449.174700] el1_interrupt+0x30/0x50
> [1774449.174705] el1h_64_irq_handler+0x14/0x20
> [1774449.174708] el1h_64_irq+0x64/0x68
> [1774449.174711] __filemap_get_folio+0x20/0x3b0
> [1774449.174715] pagecache_get_page+0x18/0x70
> [1774449.174720] grab_cache_page_write_begin+0x20/0x30
> [1774449.174725] f2fs_get_read_data_page+0x3c/0x480
> [1774449.174729] f2fs_get_lock_data_page+0x3c/0x260
> [1774449.174732] move_data_page+0x34/0x530
> [1774449.174735] do_garbage_collect+0xc54/0x12e0
> [1774449.174738] f2fs_gc+0x3b4/0x800
> [1774449.174741] gc_thread_func+0x4c8/0x640
> [1774449.174744] kthread+0xd0/0xe0
> [1774449.174748] ret_from_fork+0x10/0x20
> [1774512.194663] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774512.200436] rcu: 0-....: (27315 ticks this GP) idle=915/1/0x4000000000000000 softirq=6031130/6031130 fqs=13122
> [1774512.210828] (t=27317 jiffies g=30461577 q=2781)
> [1774512.210831] Task dump for CPU 0:
> [1774512.210834] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774512.210841] Call trace:
> [1774512.210842] dump_backtrace.part.0+0xb4/0xc0
> [1774512.210852] show_stack+0x14/0x30
> [1774512.210856] sched_show_task+0x130/0x160
> [1774512.210860] dump_cpu_task+0x40/0x4c
> [1774512.210864] rcu_dump_cpu_stacks+0xec/0x130
> [1774512.210868] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774512.210872] update_process_times+0x98/0x180
> [1774512.210875] tick_sched_timer+0x54/0xd0
> [1774512.210879] __hrtimer_run_queues+0x134/0x2d0
> [1774512.210882] hrtimer_interrupt+0x110/0x2c0
> [1774512.210886] arch_timer_handler_phys+0x28/0x40
> [1774512.210891] handle_percpu_devid_irq+0x84/0x1c0
> [1774512.210896] generic_handle_domain_irq+0x28/0x40
> [1774512.210899] gic_handle_irq+0x58/0x80
> [1774512.210904] call_on_irq_stack+0x2c/0x3c
> [1774512.210907] do_interrupt_handler+0x78/0x84
> [1774512.210911] el1_interrupt+0x30/0x50
> [1774512.210916] el1h_64_irq_handler+0x14/0x20
> [1774512.210918] el1h_64_irq+0x64/0x68
> [1774512.210921] __filemap_get_folio+0x8c/0x3b0
> [1774512.210925] pagecache_get_page+0x18/0x70
> [1774512.210930] grab_cache_page_write_begin+0x20/0x30
> [1774512.210935] f2fs_get_read_data_page+0x3c/0x480
> [1774512.210939] f2fs_get_lock_data_page+0x3c/0x260
> [1774512.210942] move_data_page+0x34/0x530
> [1774512.210945] do_garbage_collect+0xc54/0x12e0
> [1774512.210948] f2fs_gc+0x3b4/0x800
> [1774512.210951] gc_thread_func+0x4c8/0x640
> [1774512.210954] kthread+0xd0/0xe0
> [1774512.210957] ret_from_fork+0x10/0x20
> [1774560.785116] INFO: task f2fs_ckpt-179:1:401 blocked for more than 404 seconds.
> [1774560.792572] Not tainted 5.18.5-matteo #107
> [1774560.797401] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [1774560.805445] task:f2fs_ckpt-179:1 state:D stack: 0 pid: 401 ppid: 2 flags:0x00000008
> [1774560.805453] Call trace:
> [1774560.805456] __switch_to+0xc0/0x100
> [1774560.805465] __schedule+0x258/0x620
> [1774560.805469] schedule+0x44/0xb0
> [1774560.805472] rwsem_down_write_slowpath+0x314/0x5a0
> [1774560.805478] down_write+0x44/0x50
> [1774560.805482] __checkpoint_and_complete_reqs+0x6c/0x1c0
> [1774560.805487] issue_checkpoint_thread+0x34/0xc0
> [1774560.805490] kthread+0xd0/0xe0
> [1774560.805494] ret_from_fork+0x10/0x20
> [1774560.805504] INFO: task NetworkManager:1061 blocked for more than 404 seconds.
> [1774560.812854] Not tainted 5.18.5-matteo #107
> [1774560.817667] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [1774560.825708] task:NetworkManager state:D stack: 0 pid: 1061 ppid: 1 flags:0x00000000
> [1774560.825714] Call trace:
> [1774560.825716] __switch_to+0xc0/0x100
> [1774560.825720] __schedule+0x258/0x620
> [1774560.825723] schedule+0x44/0xb0
> [1774560.825726] schedule_timeout+0x114/0x150
> [1774560.825730] __wait_for_common+0xc8/0x200
> [1774560.825733] wait_for_completion+0x1c/0x30
> [1774560.825736] f2fs_issue_checkpoint+0xd0/0x190
> [1774560.825740] f2fs_sync_fs+0x48/0xd0
> [1774560.825745] f2fs_do_sync_file+0x178/0x8a0
> [1774560.825749] f2fs_sync_file+0x28/0x40
> [1774560.825753] vfs_fsync_range+0x30/0x80
> [1774560.825758] do_fsync+0x38/0x80
> [1774560.825762] __arm64_sys_fsync+0x14/0x20
> [1774560.825767] invoke_syscall.constprop.0+0x4c/0xe0
> [1774560.825771] do_el0_svc+0x40/0xd0
> [1774560.825775] el0_svc+0x14/0x50
> [1774560.825779] el0t_64_sync_handler+0xa8/0xb0
> [1774560.825782] el0t_64_sync+0x148/0x14c
> [1774560.825803] INFO: task kworker/u8:4:335638 blocked for more than 404 seconds.
> [1774560.833149] Not tainted 5.18.5-matteo #107
> [1774560.837962] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [1774560.846002] task:kworker/u8:4 state:D stack: 0 pid:335638 ppid: 2 flags:0x00000008
> [1774560.846009] Workqueue: writeback wb_workfn (flush-179:128)
> [1774560.846016] Call trace:
> [1774560.846017] __switch_to+0xc0/0x100
> [1774560.846021] __schedule+0x258/0x620
> [1774560.846024] schedule+0x44/0xb0
> [1774560.846027] schedule_timeout+0x114/0x150
> [1774560.846031] __wait_for_common+0xc8/0x200
> [1774560.846034] wait_for_completion+0x1c/0x30
> [1774560.846037] f2fs_issue_checkpoint+0xd0/0x190
> [1774560.846040] f2fs_sync_fs+0x48/0xd0
> [1774560.846044] f2fs_balance_fs_bg+0x114/0x2b0
> [1774560.846048] f2fs_write_node_pages+0x38/0x1f0
> [1774560.846053] do_writepages+0x68/0x1e0
> [1774560.846058] __writeback_single_inode+0x3c/0x3c0
> [1774560.846062] writeback_sb_inodes+0x230/0x520
> [1774560.846065] __writeback_inodes_wb+0x50/0x130
> [1774560.846069] wb_writeback+0x244/0x340
> [1774560.846073] wb_workfn+0x308/0x560
> [1774560.846077] process_one_work+0x1dc/0x420
> [1774560.846081] worker_thread+0x170/0x4c0
> [1774560.846084] kthread+0xd0/0xe0
> [1774560.846086] ret_from_fork+0x10/0x20
> [1774623.467979] rcu: INFO: rcu_sched self-detected stall on CPU
> [1774623.473755] rcu: 0-....: (2099 ticks this GP) idle=643/1/0x4000000000000000 softirq=6031246/6031247 fqs=1028
> [1774623.483976] (t=2101 jiffies g=30461613 q=633)
> [1774623.483979] Task dump for CPU 0:
> [1774623.483982] task:f2fs_gc-179:130 state:R running task stack: 0 pid: 400 ppid: 2 flags:0x0000000a
> [1774623.483989] Call trace:
> [1774623.483991] dump_backtrace.part.0+0xb4/0xc0
> [1774623.484003] show_stack+0x14/0x30
> [1774623.484007] sched_show_task+0x130/0x160
> [1774623.484013] dump_cpu_task+0x40/0x4c
> [1774623.484018] rcu_dump_cpu_stacks+0xec/0x130
> [1774623.484021] rcu_sched_clock_irq+0x8f8/0xaa0
> [1774623.484025] update_process_times+0x98/0x180
> [1774623.484028] tick_sched_timer+0x54/0xd0
> [1774623.484033] __hrtimer_run_queues+0x134/0x2d0
> [1774623.484036] hrtimer_interrupt+0x110/0x2c0
> [1774623.484040] arch_timer_handler_phys+0x28/0x40
> [1774623.484045] handle_percpu_devid_irq+0x84/0x1c0
> [1774623.484050] generic_handle_domain_irq+0x28/0x40
> [1774623.484054] gic_handle_irq+0x58/0x80
> [1774623.484059] call_on_irq_stack+0x2c/0x3c
> [1774623.484062] do_interrupt_handler+0x78/0x84
> [1774623.484066] el1_interrupt+0x30/0x50
> [1774623.484071] el1h_64_irq_handler+0x14/0x20
> [1774623.484074] el1h_64_irq+0x64/0x68
> [1774623.484077] folio_unlock+0x18/0x40
> [1774623.484081] f2fs_get_lock_data_page+0xf4/0x260
> [1774623.484085] move_data_page+0x34/0x530
> [1774623.484089] do_garbage_collect+0xc54/0x12e0
> [1774623.484092] f2fs_gc+0x3b4/0x800
> [1774623.484095] gc_thread_func+0x4c8/0x640
> [1774623.484098] kthread+0xd0/0xe0
> [1774623.484101] ret_from_fork+0x10/0x20
>
> root@...chiatobin:~# uname -a
> Linux macchiatobin 5.18.5-matteo #107 SMP Fri Jun 17 17:58:26 CEST 2022 aarch64 GNU/Linux
>
>
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