#io #swap #zram
ubuntu，文件管理器卡IO了 kernel 6.8
[2510408.288513] sysrq: Show Blocked State
[2510408.288695] task:nautilus state:D stack:0 pid:858855 tgid:858855 ppid:519827 flags:0x00000002
[2510408.288702] Call Trace:
[2510408.288706] <TASK>
[2510408.288710] __schedule+0x27c/0x6a0
[2510408.288721] schedule+0x33/0x110
[2510408.288725] schedule_timeout+0x95/0x170
[2510408.288731] ? __pfx_process_timeout+0x10/0x10
[2510408.288737] io_schedule_timeout+0x51/0x80
[2510408.288740] wait_for_completion_io_timeout+0x81/0x150
[2510408.288745] submit_bio_wait+0x7a/0xc0
[2510408.288750] swap_read_folio_bdev_sync+0xe7/0x180
[2510408.288755] ? __pfx_submit_bio_wait_endio+0x10/0x10
[2510408.288760] swap_read_folio+0x92/0x220
[2510408.288764] do_swap_page+0x867/0xa40
[2510408.288767] ? wp_page_reuse+0x95/0xc0
[2510408.288770] ? __pte_offset_map+0x1c/0x1b0
[2510408.288774] handle_pte_fault+0x17b/0x1d0
[2510408.288778] __handle_mm_fault+0x64e/0x790
[2510408.288782] handle_mm_fault+0x18d/0x380
[2510408.288786] do_user_addr_fault+0x169/0x670
[2510408.288790] exc_page_fault+0x83/0x1b0
[2510408.288795] asm_exc_page_fault+0x27/0x30

swap交换内存页卡死了
cat /sys//block/zram4/backing_dev
/dev/loop26


[2510569.503067] Workqueue: loop26 loop_rootcg_workfn
[2510569.503070] Call Trace:
[2510569.503071] <TASK>
[2510569.503072] __schedule+0x27c/0x6a0
[2510569.503076] schedule+0x33/0x110
[2510569.503078] io_schedule+0x46/0x80
[2510569.503080] folio_wait_bit_common+0x136/0x330
[2510569.503084] ? __pfx_wake_page_function+0x10/0x10
[2510569.503086] filemap_update_page+0x24c/0x270
[2510569.503089] filemap_get_pages+0x24f/0x3b0
[2510569.503092] filemap_read+0x100/0x480
[2510569.503095] generic_file_read_iter+0xbb/0x110
[2510569.503098] ext4_file_read_iter+0x63/0x210
[2510569.503102] do_iter_readv_writev+0x199/0x1d0
[2510569.503106] vfs_iter_read+0xac/0x150
[2510569.503109] lo_read_simple+0x146/0x230
[2510569.503112] do_req_filebacked+0x15b/0x180
[2510569.503114] loop_process_work+0xba/0x390
[2510569.503116] loop_rootcg_workfn+0x1b/0x30
[2510569.503117] process_one_work+0x16f/0x350
zram4上的backing_dev loop26 卡IO阻塞swap page读回