msi_init function is called by multithreads at the same time,
there should be mutex lock against status variable access, or
adding this function with __initcall prefix?
thanks
bibo,mao
Stephen Hemminger wrote:
Got this on boot up, doesn't seem to be reliably reproducible.
System ran okay. My guess is it is a mulithread probe issue
[ 2.773198] assign_interrupt_mode Found MSI capability
[ 2.773227] assign_interrupt_mode Found MSI capability
[ 2.773291] kmem_cache_create: duplicate cache msi_cache
[ 2.773408] assign_interrupt_mode Found MSI capability
[ 2.773485] [dump_trace+100/461] dump_trace+0x64/0x1cd
[ 2.773573] assign_interrupt_mode Found MSI capability
[ 2.773644] [show_trace_log_lvl+18/37] <7>PCI: Setting latency timer of device 0000:00:1c.3 to 64
[ 2.773707] assign_interrupt_mode Found MSI capability
[ 2.774538] show_trace_log_lvl+0x12/0x25
[ 2.774606] [show_trace+13/16] show_trace+0xd/0x10
[ 2.774698] [dump_stack+25/27] dump_stack+0x19/0x1b
[ 2.774794] [kmem_cache_create+1065/1116] kmem_cache_create+0x429/0x45c
[ 2.775078] [msi_init+90/154] msi_init+0x5a/0x9a
[ 2.775554] [pci_enable_msi+35/546] pci_enable_msi+0x23/0x222
[ 2.776041] [pcie_port_device_register+522/847] pcie_port_device_register+0x20a/0x34f
[ 2.776519] [pcie_portdrv_probe+87/128] pcie_portdrv_probe+0x57/0x80
[ 2.777001] [pci_device_probe+57/91] pci_device_probe+0x39/0x5b
[ 2.777467] [really_probe+60/181] really_probe+0x3c/0xb5
[ 2.778074] [kthread+197/243] kthread+0xc5/0xf3
[ 2.778266] [kernel_thread_helper+7/16] kernel_thread_helper+0x7/0x10
[ 2.778360] DWARF2 unwinder stuck at kernel_thread_helper+0x7/0x10
[ 2.778403]
[ 2.778441] Leftover inexact backtrace:
[ 2.778444]
[ 2.778517] [show_trace_log_lvl+18/37] show_trace_log_lvl+0x12/0x25
[ 2.778592] [show_trace+13/16] show_trace+0xd/0x10
[ 2.778665] [dump_stack+25/27] dump_stack+0x19/0x1b
[ 2.778738] [kmem_cache_create+1065/1116] kmem_cache_create+0x429/0x45c
[ 2.778817] [msi_init+90/154] msi_init+0x5a/0x9a
[ 2.778896] [pci_enable_msi+35/546] pci_enable_msi+0x23/0x222
[ 2.778970] [pcie_port_device_register+522/847] pcie_port_device_register+0x20a/0x34f
[ 2.779045] [pcie_portdrv_probe+87/128] pcie_portdrv_probe+0x57/0x80
[ 2.779120] [pci_device_probe+57/91] pci_device_probe+0x39/0x5b
[ 2.779193] [really_probe+60/181] really_probe+0x3c/0xb5
[ 2.779267] [kthread+197/243] kthread+0xc5/0xf3
[ 2.779341] [kernel_thread_helper+7/16] kernel_thread_helper+0x7/0x10
[ 2.779414] =======================
[ 2.779455] PCI: MSI cache init failed
[ 2.802070] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
[ 2.802247] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
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