try_to_writeback_inodes_sb

watch -n 0.1 "date +%s >> stack.log;cat /proc/17186/stack >> stack.log"

1720066675                                
[<0>] wb_wait_for_completion+0x74/0xa8    
[<0>] __writeback_inodes_sb_nr+0x94/0xb8  
[<0>] try_to_writeback_inodes_sb+0x54/0x70
[<0>] ext4_nonda_switch+0x48/0x98         
[<0>] ext4_da_write_begin+0x64/0x220      
[<0>] generic_perform_write+0xb0/0x1b0    
[<0>] ext4_buffered_write_iter+0x7c/0x120 
[<0>] ext4_file_write_iter+0x4a8/0x648    
[<0>] vfs_write+0x1b0/0x380               
[<0>] ksys_write+0x64/0xe0                
[<0>] __arm64_sys_write+0x18/0x20         
[<0>] invoke_syscall+0x74/0xf8            
[<0>] el0_svc_common.constprop.3+0xa8/0xe8
[<0>] do_el0_svc+0x94/0xa0                
[<0>] el0_svc+0x14/0x40                   
[<0>] el0t_64_sync_handler+0x3c/0xb8      
[<0>] el0t_64_sync+0x148/0x14c            
1720066675  

原文地址：https://blog.csdn.net/wmzjzwlzs/article/details/143609001

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