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Fri, 23 Aug 2024 14:09:29 +0000 Date: Fri, 23 Aug 2024 16:09:23 +0200 From: Maciej Fijalkowski To: Magnus Karlsson CC: Alasdair McWilliam , "xdp-newbies@vger.kernel.org" Subject: Re: ICE + XSK ZC - page faults on 6.1 LTS when process exits? 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?f1lR7K4qFjQD3u4zQKXNtQB5OVJxzLuH4FvdBxRA5u1PK5kmasMPajX7W1u8?= =?us-ascii?Q?2VQVXUl7SPRPY0aris7Hdm55Kbu2vehGZom1M2Racg6ldn5yyxw0Xx3SiP0v?= =?us-ascii?Q?IC6uuAxBRvH7kUUO/mMlF19GEKFEt+G5vcL81Is4OEg7taRTylMgCDBcenAs?= =?us-ascii?Q?53Rz7znnTDUYx4bsFszhLad+gH+GWJ8IfFLzEq53rQL90YWkgPHZz0boCRyO?= =?us-ascii?Q?aCYEBsVmbKaMItPvwXEajsm3IQn2Kgm2VuttkqgMx85m5rm2hixnvCxtUklv?= =?us-ascii?Q?HQQwbLP9yuVQ90ivKO8x4Z9hDNSGX/LFTuWYIDUYZD//gMYuxRBHYrsUHnxY?= =?us-ascii?Q?KYVRxJI7HBtzA17q8oSrkqmd+K8NZd0NEbihLPa37aJWnCIZa7KjM+S+7qar?= =?us-ascii?Q?H2EH1nPvmcnio2L+aZvb/bHO1c4O8eI7aoJ+MMWejlNNzeKxAZWUXKdXAOyC?= =?us-ascii?Q?zSVABFOAr3iEd8dPMiRV7JDA+ctWFJnUXDqTB1wWJ+oFErS3Q0ubqVpbLUzI?= =?us-ascii?Q?FvjiA/Q5P3jjHF3+ds1gsL65fxs36roMxbUBy8IWjp+ExmnaXCZ+dKcd5avf?= =?us-ascii?Q?68TiBFNoCZ2Insq4rDXjEPj6anyD+tacOIHd3Tc42GZHX2ZIIg0oq2tC6WOn?= =?us-ascii?Q?VhHEkuOc910MozAFlQE9QolU4TMJqmGtVegzhAZsNdZa37AghHqlUKgTIm2H?= =?us-ascii?Q?TSdcetBeYRA9/awY8B8KHJHNuOqo0jXrbIv7oGcc8T8zWlRL1E7lX1a4BOcs?= =?us-ascii?Q?1kFunPD7HmWUOwbhr05s3WqIaVZYYnGTBzByhrHYvanHMdsSA/VdVwd8OO3t?= =?us-ascii?Q?uMcoNEAfibPRAzaetc+ebfO4PKWmGCXJ7NNKfU/TQj5ebJe8aoAxXMlVcmPP?= =?us-ascii?Q?HSl07eWALfeGFYVxVmoiMwNeauXrhB3OG6uWhsBTeCcndwAqUeOSQBfKyKZn?= =?us-ascii?Q?P/HHAg0bcm241i4QKxLuQWGfIv+AZK1MKCxsv/tDolJBEEEbQX+JYwdsWUJv?= =?us-ascii?Q?bDSGDkNdv1kWhtV5Kkv38U0Zv1f/pz4PhwZRLbJP52H0lcvG4oL/j6n4C6EE?= =?us-ascii?Q?+BisJdfZ8s3WlTyWviODCIooypT+1OWFU/+ih7i1RWp+A75kzL8wrngT4g3Z?= =?us-ascii?Q?S34oX4iWP1hVJ/0E6IqUE0vuHSBWtzLaXTlE6/XIMBKjHpjh43lhYQTjPLV8?= =?us-ascii?Q?T1vt8DafWM375pXwq/5w2PCVM7f45q2H1G8EGmFsZk+fQhUpYl33VQ0UOFLH?= =?us-ascii?Q?5IpIz8Z0XV4AFBzH99NO2mdyBc0i0jBa8fELedzZdpZ/cFktdnEXqT5PGB4Y?= =?us-ascii?Q?kKlYcoBWZP/lIbdWSzFA2ZPHzP6b7gaOjuRr5r32z1quvxEbrfGmz2eOzGDE?= =?us-ascii?Q?MI6usOpLpzWi8V+fHrJeO8Xdqig3ZawkQ/ndPwmzcMiEmdorv9FK/hvPy/4a?= =?us-ascii?Q?oLsm/JDs8bMzlvUgO+4+6nPjZduUxdBN0rozF1Q9KoNuwE8wVNThXLoAAlF6?= =?us-ascii?Q?x6pejMoFg8tTJ+y+YpNlM/+ltt3xssTrbcWbAEZ5Ibpvg+xjE1E489j5bx9D?= =?us-ascii?Q?ZLONnJSy46JcftV4NewH0qdmx+OPMDmLtNS5pDQEV7RBvHOvNvoy8LeDrNgC?= =?us-ascii?Q?Qw=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: a0efac08-904b-4a4e-4d69-08dcc37d3437 X-MS-Exchange-CrossTenant-AuthSource: DM4PR11MB6117.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Aug 2024 14:09:29.5292 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: TyKhLK9A0VojH4AILoa/TEx/EaDxdifpf+1OZYxHO0P+0LXLEnW6xX3gm2UB2OiwDNWrfsHDBNPd8r+t6cq3719VQtuUagFwoD3SJLBq0vE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR11MB8239 X-OriginatorOrg: intel.com On Fri, Aug 23, 2024 at 10:17:35AM +0200, Magnus Karlsson wrote: > On Thu, 22 Aug 2024 at 18:25, Alasdair McWilliam > wrote: > > > > Hi, > > > > I've been testing apps that use XSK+ZC on ICE with newer builds of the = 6.1 LTS kernel in preparation for some production upgrades, and I've starte= d to notice some instability on newer versions. I can reproduce the issue e= asily in the lab. > > > > Config: > > - Known good multi-threaded application (i.e. production grade) > > - Uses eBPF and AF_XDP with zero copy to act as 'bump in wire' in netwo= rk > > - Xeon's with Intel E810-CQDA2 (firmware: 3.20 0x8000d83e 1.3146.0) > > - Effectively a vanilla rebuild of 6.1 using configs from el-repo proje= ct > > > > Scenario: > > - Noticing hard kernel faults when shutting down application > > - Can happen if the process is shut down via systemctl stop > > - Can even happen with a simple kill -9 command to the PID > > - Appears in builds after 6.1.87 > > > > Tested kernels: > > - 6.1.84: process exits smoothly > > - 6.1.87: process exits smoothly > > - 6.1.97: BUG: unable to handle page fault for address > > - 6.1.106: BUG: unable to handle page fault for address > > > > Kdump log is below [1] from 6.1.106 but does seem to be the same in the= earlier version. > > > > Can anyone advise if this is a known issue? > > > > I don't have any builds between 6.1.87 and 6.1.97 but I can spend some = time trying to pinpoint the exact version things start to go wrong in, if i= t would help anyone better equipped than me to debug! >=20 > Hi Alasdair, >=20 > It would be of great help if you could pinpoint the exact version for > this breakage. Hopefully we could then find the commit in the ice > driver that breaks your app, since there should be just a handful of > commits in the ice driver for any stable release. $ git log --oneline v6.1.87..v6.1.97 drivers/net/ethernet/intel/ice/ dd37b86999fd ice: Fix VSI list rule with ICE_SW_LKUP_LAST type 224b69e8751c ice: avoid IRQ collision to fix init failure on ACPI S3 resume 531d85b4fb66 ice: move RDMA init to ice_idc.c a62c50545b4d ice: remove af_xdp_zc_qps bitmap 447a5433bd1e ice: remove null checks before devm_kfree() calls a388961be5ed ice: Introduce new parameters in ice_sched_node 17ccdebe5ac7 ice: fix iteration of TLVs in Preserved Fields Area 07cbc5512023 ice: fix accounting if a VLAN already exists 5ef3a27c6142 ice: Interpret .set_channels() input differently 90cbd4c081bb ice: remove unnecessary duplicate checks for VF VSI ID 59161a21cae0 ice: pass VSI pointer into ice_vc_isvalid_q_id 6a6ebec40820 ice: tc: allow zero flags in parsing tc flower can you revert a62c50545b4d and see if the issue persists? >=20 > > Kind regards > > Alasdair > > > > [1] kdump log > > > > [ 158.666867] BUG: unable to handle page fault for address: ffffa6510e= 5580c0 > > [ 158.666887] #PF: supervisor read access in kernel mode > > [ 158.666896] #PF: error_code(0x0000) - not-present page > > [ 158.666903] PGD 100000067 P4D 100000067 PUD 106dc4067 PMD 0 > > [ 158.666914] Oops: 0000 [#1] PREEMPT SMP PTI > > [ 158.666922] CPU: 7 PID: 1808 Comm: tlndd.bin Kdump: loaded Tainted: = G E 6.1.106-1.X.el9.x86_64 #1 > > [ 158.666940] Hardware name: Supermicro SYS-1028R-TDW/X10DDW-i, BIOS 3= .2 12/16/2019 > > [ 158.666950] RIP: 0010:xp_free+0x11/0x80 > > [ 158.666962] Code: 8b 04 d0 48 83 e0 fe 48 01 f0 c3 cc cc cc cc 66 2e= 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 56 41 55 41 54 55 48 8d 6f 58 53= <48> 8b 47 58 48 39 c5 74 0d 5b 5d 41 5c 41 5d 41 5e c3 cc cc cc cc > > [ 158.666985] RSP: 0018:ffffa65089e8b760 EFLAGS: 00010202 > > [ 158.666993] RAX: ffff8fcf077c0000 RBX: 0000000000000001 RCX: 0000000= 000000000 > > [ 158.667003] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffa65= 10e558068 > > [ 158.667012] RBP: ffffa6510e5580c0 R08: fffff8c50415a108 R09: ffff8fc= 7cac60000 > > [ 158.667022] R10: 0000000000000219 R11: ffffffffffffffff R12: 0000000= 000000fff > > [ 158.667031] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8fc= 7c139d340 > > [ 158.667040] FS: 00007f8504996880(0000) GS:ffff8fcedfdc0000(0000) kn= lGS:0000000000000000 > > [ 158.667050] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [ 158.667058] CR2: ffffa6510e5580c0 CR3: 00000001448e2002 CR4: 0000000= 0001706e0 > > [ 158.667068] Call Trace: > > [ 158.667075] > > [ 158.667082] ? show_trace_log_lvl+0x1c4/0x2df > > [ 158.667094] ? show_trace_log_lvl+0x1c4/0x2df > > [ 158.667103] ? ice_xsk_clean_rx_ring+0x39/0x60 [ice] > > [ 158.667157] ? __die_body.cold+0x8/0xd > > [ 158.667166] ? page_fault_oops+0xac/0x150 > > [ 158.667176] ? fixup_exception+0x22/0x340 > > [ 158.667185] ? exc_page_fault+0xb2/0x150 > > [ 158.667195] ? asm_exc_page_fault+0x22/0x30 > > [ 158.667206] ? xp_free+0x11/0x80 > > [ 158.667215] ice_xsk_clean_rx_ring+0x39/0x60 [ice] > > [ 158.667250] ice_clean_rx_ring+0x157/0x180 [ice] > > [ 158.667284] ice_down+0x172/0x2b0 [ice] > > [ 158.667311] ? ice_xdp_setup_prog+0x3b0/0x3b0 [ice] > > [ 158.667337] ice_xdp_setup_prog+0xe3/0x3b0 [ice] > > [ 158.667364] ? ice_xdp_setup_prog+0x3b0/0x3b0 [ice] > > [ 158.667391] dev_xdp_install+0xc7/0x100 > > [ 158.667402] dev_xdp_attach+0x1e0/0x560 > > [ 158.667412] do_setlink+0x7a8/0xc10 > > [ 158.667422] ? __nla_validate_parse+0x12b/0x1b0 > > [ 158.667436] __rtnl_newlink+0x540/0x650 > > [ 158.667446] rtnl_newlink+0x44/0x70 > > [ 158.667454] rtnetlink_rcv_msg+0x15c/0x3d0 > > [ 158.667477] ? rtnl_calcit.isra.0+0x140/0x140 > > [ 158.667485] netlink_rcv_skb+0x51/0x100 > > [ 158.667727] netlink_unicast+0x246/0x360 > > [ 158.667953] netlink_sendmsg+0x24e/0x4b0 > > [ 158.668173] __sock_sendmsg+0x62/0x70 > > [ 158.668389] ____sys_sendmsg+0x247/0x2d0 > > [ 158.668602] ? copy_msghdr_from_user+0x6d/0xa0 > > [ 158.668815] ___sys_sendmsg+0x88/0xd0 > > [ 158.669028] ? __sk_destruct+0x156/0x230 > > [ 158.669234] ? kmem_cache_free+0x134/0x300 > > [ 158.669437] ? rcu_nocb_try_bypass+0x4a/0x440 > > [ 158.669634] ? __sk_destruct+0x156/0x230 > > [ 158.669825] ? _raw_spin_unlock_irqrestore+0x23/0x40 > > [ 158.670010] ? mod_objcg_state+0xc9/0x2f0 > > [ 158.670186] ? refill_obj_stock+0xae/0x160 > > [ 158.670359] ? rseq_get_rseq_cs.isra.0+0x16/0x220 > > [ 158.670529] ? rcu_nocb_try_bypass+0x4a/0x440 > > [ 158.670696] ? rseq_ip_fixup+0x72/0x1e0 > > [ 158.670860] __sys_sendmsg+0x59/0xa0 > > [ 158.671021] ? syscall_trace_enter.constprop.0+0x11e/0x190 > > [ 158.671185] do_syscall_64+0x35/0x80 > > [ 158.671345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 > > [ 158.671503] RIP: 0033:0x7f850510f917 > > [ 158.671658] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f= 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05= <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 > > [ 158.671993] RSP: 002b:00007ffcc805f238 EFLAGS: 00000246 ORIG_RAX: 00= 0000000000002e > > [ 158.672171] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8= 50510f917 > > [ 158.672352] RDX: 0000000000000000 RSI: 000000000198e9e8 RDI: 0000000= 000000009 > > [ 158.672534] RBP: 0000000001933c00 R08: 0000000001935980 R09: 0000000= 000460e48 > > [ 158.672716] R10: 0000000000000011 R11: 0000000000000246 R12: 0000000= 001933c30 > > [ 158.672899] R13: 0000000000515fd8 R14: 000000000198e9d0 R15: 0000000= 000513690 > > [ 158.673086] > > [ 158.673269] Modules linked in: bonding(E) tls(E) nft_fib_inet(E) nft= _fib_ipv4(E) nft_fib_ipv6(E) nft_fib(E) nft_reject_inet(E) nf_reject_ipv4(E= ) nf_reject_ipv6(E) nft_reject(E) nft_ct(E) nft_chain_nat(E) nf_nat(E) nf_c= onntrack(E) nf_defrag_ipv6(E) nf_defrag_ipv4(E) rfkill(E) ip_set(E) nf_tabl= es(E) libcrc32c(E) nfnetlink(E) vfat(E) fat(E) ipmi_ssif(E) intel_rapl_msr(= E) intel_rapl_common(E) sb_edac(E) x86_pkg_temp_thermal(E) intel_powerclamp= (E) coretemp(E) kvm_intel(E) iTCO_wdt(E) intel_pmc_bxt(E) iTCO_vendor_suppo= rt(E) kvm(E) irqbypass(E) rapl(E) intel_cstate(E) ast(E) intel_uncore(E) dr= m_vram_helper(E) drm_ttm_helper(E) ttm(E) pcspkr(E) mei_me(E) drm_kms_helpe= r(E) i2c_i801(E) lpc_ich(E) mei(E) i2c_smbus(E) mxm_wmi(E) ioatdma(E) acpi_= ipmi(E) ipmi_si(E) ipmi_devintf(E) ipmi_msghandler(E) acpi_pad(E) acpi_powe= r_meter(E) joydev(E) drm(E) fuse(E) ext4(E) mbcache(E) jbd2(E) sd_mod(E) t1= 0_pi(E) sg(E) ahci(E) crct10dif_pclmul(E) crc32_pclmul(E) libahci(E) crc32c= _intel(E) ice(E) > > [ 158.673314] polyval_clmulni(E) polyval_generic(E) igb(E) libata(E) = ghash_clmulni_intel(E) i2c_algo_bit(E) dca(E) wmi(E) dm_mirror(E) dm_region= _hash(E) dm_log(E) dm_mod(E) > > [ 158.675578] CR2: ffffa6510e5580c0