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arc=pass ("microsoft.com:s=arcselector9901:i=1"); spf=pass (imf26.hostedemail.com: domain of badari.pulavarty@intel.com designates 192.55.52.43 as permitted sender) smtp.mailfrom=badari.pulavarty@intel.com; dmarc=pass (policy=none) header.from=intel.com X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 842B7140036 X-HE-Tag: 1666388261-879617 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi All, I have been tracking similar issue(s) with soft lockup or panics on my syst= em consistently with my workload. Tried multiple kernel versions. Issue seem to happen consistently on 6.1-rc= 1 (while it seem to happen on 5.17, 5.19, 6.0.X) PANIC: "Kernel panic - not syncing: softlockup: hung tasks" RIP: 0000000000000001 RSP: ff3d8e7f0d9978ea RFLAGS: ff3d8e7f0d9978e8 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 000000006b9c66f1 RSI: ff506ca15ff33c20 RDI: 0000000000000000 RBP: ffffffff84bc64cc R8: ff3d8e412cabdff0 R9: ffffffff84c00e8b R10: ff506ca15ff33b69 R11: 0000000000000000 R12: ff506ca15ff33b58 R13: ffffffff84bc79a3 R14: ff506ca15ff33b38 R15: 0000000000000000 ORIG_RAX: ff506ca15ff33a80 CS: ff506ca15ff33c78 SS: 0000 #9 [ff506ca15ff33c18] xas_load at ffffffff84b49a7f #10 [ff506ca15ff33c28] __filemap_get_folio at ffffffff840985da #11 [ff506ca15ff33ce8] swap_cache_get_folio at ffffffff841119db #12 [ff506ca15ff33d18] do_swap_page at ffffffff840dbd21 #13 [ff506ca15ff33db8] __handle_mm_fault at ffffffff840ddee3 #14 [ff506ca15ff33e88] handle_mm_fault at ffffffff840de55d #15 [ff506ca15ff33ec8] do_user_addr_fault at ffffffff83e93247 #16 [ff506ca15ff33f20] exc_page_fault at ffffffff84bc711d #17 [ff506ca15ff33f50] asm_exc_page_fault at ffffffff84c00b77 Tried various patches proposed on this thread chain.. but no luck so far. Looks like its stuck in following loop forever causing softlockup/panic: if (!folio_try_get_rcu(folio))=20 goto repeat; Looking at the crash dump, mapping->host became NULL. Not sure what exactly= is happening. Welcome any ideas to track it down further. struct address_space { host =3D 0x0, i_pages =3D { xa_lock =3D { { rlock =3D { raw_lock =3D { { val =3D { counter =3D 0 }, { locked =3D 0 '\000', pending =3D 0 '\000' }, { locked_pending =3D 0, tail =3D 0 } } } } } }, xa_flags =3D 1, xa_head =3D 0xff3d8e7f9ca41daa }, invalidate_lock =3D { count =3D { counter =3D 0 }, owner =3D { counter =3D 0 }, osq =3D { tail =3D { counter =3D 0 } }, wait_lock =3D { raw_lock =3D { { val =3D { counter =3D 0 }, { locked =3D 0 '\000', pending =3D 0 '\000' }, { locked_pending =3D 0, tail =3D 0 } } } }, wait_list =3D { next =3D 0x0, prev =3D 0x0 } }, gfp_mask =3D 0, i_mmap_writable =3D { counter =3D 0 }, i_mmap =3D { rb_root =3D { rb_node =3D 0x0 }, rb_leftmost =3D 0x0 }, i_mmap_rwsem =3D { count =3D { counter =3D 0 }, owner =3D { counter =3D 0 }, osq =3D { tail =3D { counter =3D 0 } }, wait_lock =3D { raw_lock =3D { { val =3D { counter =3D 0 }, { locked =3D 0 '\000', pending =3D 0 '\000' }, { locked_pending =3D 0, tail =3D 0 } } } }, wait_list =3D { next =3D 0x0, prev =3D 0x0 } }, nrpages =3D 1897, writeback_index =3D 0, a_ops =3D 0xffffffff85044560, flags =3D 32, wb_err =3D 0, private_lock =3D { { rlock =3D { raw_lock =3D { { val =3D { counter =3D 0 }, { locked =3D 0 '\000', pending =3D 0 '\000' }, { locked_pending =3D 0, tail =3D 0 } } } } } }, private_list =3D { next =3D 0x0, prev =3D 0x0 }, private_data =3D 0x0 } Thanks, Badari