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SubjectXen-unstable Linux-6.1.0-rc5 BUG: unable to handle page fault for address: ffff8880083374d0
Hi Yu / Juergen,

This night I got a dom0 kernel crash on my new Ryzen box running Xen-unstable and a Linux-6.1.0-rc5 kernel.
I did enable the new and shiny MGLRU, could this be related ?

--
Sander


Nov 19 06:30:11 serveerstertje kernel: [68959.647371] BUG: unable to handle page fault for address: ffff8880083374d0
Nov 19 06:30:11 serveerstertje kernel: [68959.663555] #PF: supervisor write access in kernel mode
Nov 19 06:30:11 serveerstertje kernel: [68959.677542] #PF: error_code(0x0003) - permissions violation
Nov 19 06:30:11 serveerstertje kernel: [68959.691181] PGD 3026067 P4D 3026067 PUD 3027067 PMD 7fee5067 PTE 8010000008337065
Nov 19 06:30:11 serveerstertje kernel: [68959.705084] Oops: 0003 [#1] PREEMPT SMP NOPTI
Nov 19 06:30:11 serveerstertje kernel: [68959.718710] CPU: 7 PID: 158 Comm: kswapd0 Not tainted 6.1.0-rc5-20221118-doflr-mac80211debug+ #1
Nov 19 06:30:11 serveerstertje kernel: [68959.732457] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./B450 Pro4 R2.0, BIOS P5.60 10/20/2022
Nov 19 06:30:11 serveerstertje kernel: [68959.746391] RIP: e030:pmdp_test_and_clear_young+0x25/0x40
Nov 19 06:30:11 serveerstertje kernel: [68959.760294] Code: 00 00 00 66 90 48 b9 ff ff 1f 00 00 00 f0 ff 48 8b 02 48 be ff 0f 00 00 00 00 f0 ff a8 80 48 0f 44 ce 48 21 c8 83 e0 20 74 0c <f0> 48 0f ba 32 05 0f 92 c0 0f b6 c0 c3 cc cc c
Nov 19 06:30:11 serveerstertje kernel: [68959.787908] RSP: e02b:ffffc9000161f940 EFLAGS: 00010202
Nov 19 06:30:11 serveerstertje kernel: [68959.801637] RAX: 0000000000000020 RBX: 0000000000000000 RCX: fff0000000000fff
Nov 19 06:30:11 serveerstertje kernel: [68959.815243] RDX: ffff8880083374d0 RSI: fff0000000000fff RDI: ffff888010f41000
Nov 19 06:30:11 serveerstertje kernel: [68959.828683] RBP: ffffc9000161fa70 R08: 000ffffffffff000 R09: 00005654134b5000
Nov 19 06:30:11 serveerstertje kernel: [68959.842026] R10: 000000000000689e R11: 0000000000000000 R12: ffff8880083374d0
Nov 19 06:30:11 serveerstertje kernel: [68959.855214] R13: ffff88807fc1a000 R14: ffff8880083374d0 R15: 0000000000000000
Nov 19 06:30:11 serveerstertje kernel: [68959.868118] FS: 0000000000000000(0000) GS:ffff8880801c0000(0000) knlGS:0000000000000000
Nov 19 06:30:11 serveerstertje kernel: [68959.880689] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033
Nov 19 06:30:11 serveerstertje kernel: [68959.893457] CR2: ffff8880083374d0 CR3: 000000000f33c000 CR4: 0000000000050660
Nov 19 06:30:11 serveerstertje kernel: [68959.906377] Call Trace:
Nov 19 06:30:11 serveerstertje kernel: [68959.919219] <TASK>
Nov 19 06:30:11 serveerstertje kernel: [68959.931844] walk_pmd_range_locked.isra.87+0x2e9/0x4e0
Nov 19 06:30:11 serveerstertje kernel: [68959.944840] walk_pud_range+0x69c/0x980
Nov 19 06:30:11 serveerstertje kernel: [68959.957562] walk_pgd_range+0xe9/0x810
Nov 19 06:30:11 serveerstertje kernel: [68959.970161] ? mt_find+0x1f8/0x3c0
Nov 19 06:30:11 serveerstertje kernel: [68959.982808] __walk_page_range+0x17b/0x180
Nov 19 06:30:11 serveerstertje kernel: [68959.995440] walk_page_range+0x106/0x170
Nov 19 06:30:11 serveerstertje kernel: [68960.008014] try_to_inc_max_seq+0x40a/0x9e0
Nov 19 06:30:11 serveerstertje kernel: [68960.020262] lru_gen_age_node+0x1d3/0x280
Nov 19 06:30:11 serveerstertje kernel: [68960.032222] ? shrink_node+0x294/0x710
Nov 19 06:30:11 serveerstertje kernel: [68960.044129] balance_pgdat+0x1c3/0x650
Nov 19 06:30:11 serveerstertje kernel: [68960.055995] ? prepare_to_wait_event+0x110/0x110
Nov 19 06:30:11 serveerstertje kernel: [68960.068022] kswapd+0x1f0/0x3a0
Nov 19 06:30:11 serveerstertje kernel: [68960.079997] ? prepare_to_

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