Control: forwarded -1 https://lore.kernel.org/stable/20250503091422.0389.40950...@e16-tech.com/ Control: tags -1 + upstream moreinfo
Hi Laurent, On Sun, May 04, 2025 at 11:24:09AM +0200, Laurent Bonnaud wrote: > Package: src:linux > Version: 6.12.25-1 > Severity: normal > > Dear Maintainer, > > when this system boots up, the kernel outputs this warning message: > > [ 1.977261] ------------[ cut here ]------------ > [ 1.977265] WARNING: CPU: 0 PID: 11 at block/blk-mq-cpumap.c:90 > blk_mq_map_hw_queues+0xcf/0xe0 > [ 1.977284] Modules linked in: ahci(+) libahci xhci_pci ixgbe(+) libata > xhci_hcd megaraid_sas(+) xfrm_algo dca tg3 i2c_i801 crc32_pclmul usbcore > crc32c_intel scsi_mod mdio_devres i2c_smbus libphy mdio lpc_ich usb_common > scsi_common wmi > [ 1.977355] CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted > 6.12.25-amd64 #1 Debian 6.12.25-1 > [ 1.977366] Hardware name: Dell Inc. PowerEdge R540/0PRWNC, BIOS 2.23.0 > 01/09/2025 > [ 1.977372] Workqueue: events work_for_cpu_fn > [ 1.977389] RIP: 0010:blk_mq_map_hw_queues+0xcf/0xe0 > [ 1.977401] Code: 8b 35 d5 d6 82 01 48 63 d0 48 c7 c7 60 15 60 aa e8 c6 b5 > 05 00 3b 05 c0 d6 82 01 72 d3 5b 5d 41 5c 41 5d 41 5e c3 cc cc cc cc <0f> 0b > eb d2 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 > [ 1.977409] RSP: 0018:ffff9a77400d7d48 EFLAGS: 00010206 > [ 1.977417] RAX: 0000000000000000 RBX: ffff88f892c88000 RCX: > 000000000000000a > [ 1.977424] RDX: 0000000000000001 RSI: ffff88f882f380c8 RDI: > ffff88f892c880e8 > [ 1.977430] RBP: 0000000000000001 R08: ffffffffaa601560 R09: > 0000000000000000 > [ 1.977436] R10: ffff9a77400d7d88 R11: 0000000000000040 R12: > 0000000000000200 > [ 1.977442] R13: 0000000000000000 R14: ffff88f892c880e8 R15: > ffff88f8861e3000 > [ 1.977448] FS: 0000000000000000(0000) GS:ffff88ffdfc00000(0000) > knlGS:0000000000000000 > [ 1.977455] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 1.977462] CR2: 00007f8fba480900 CR3: 0000000210222003 CR4: > 00000000007706f0 > [ 1.977469] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 1.977474] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > [ 1.977479] PKRU: 55555554 > [ 1.977484] Call Trace: > [ 1.977490] <TASK> > [ 1.977499] megasas_map_queues+0x49/0x90 [megaraid_sas] > [ 1.977544] blk_mq_alloc_tag_set+0x154/0x3a0 > [ 1.977555] scsi_add_host_with_dma.cold+0x9b/0x2b6 [scsi_mod] > [ 1.977617] megasas_probe_one.cold+0x14ba/0x16c8 [megaraid_sas] > [ 1.977667] local_pci_probe+0x42/0x90 > [ 1.977691] work_for_cpu_fn+0x17/0x30 > [ 1.977703] process_one_work+0x174/0x330 > [ 1.977714] worker_thread+0x251/0x390 > [ 1.977725] ? __pfx_worker_thread+0x10/0x10 > [ 1.977734] kthread+0xcf/0x100 > [ 1.977741] ? __pfx_kthread+0x10/0x10 > [ 1.977747] ret_from_fork+0x31/0x50 > [ 1.977757] ? __pfx_kthread+0x10/0x10 > [ 1.977763] ret_from_fork_asm+0x1a/0x30 > [ 1.977778] </TASK> > [ 1.977781] ---[ end trace 0000000000000000 ]--- > > With 6.1 kernels from Debian 12, no such problem exists. I think this is the same issue as reported upstream in https://lore.kernel.org/stable/20250503091422.0389.40950...@e16-tech.com/ . Can you confirm that the commit a9ae6fe1c319 ("blk-mq: create correct map for fallback case") fixes the issue for you as well? https://git.kernel.org/linus/a9ae6fe1c319c4776c2b11e85e15109cd3f04076 Regards, Salvatore
