在CentOS7 x64安装了ocz revodrive3x2驱动后, 系统无法启动.

http://ocz.com/consumer/download/drivers/linux-v4.1.769/oczpcie-fedora19-v4.1.769.x86_64.rpm

http://ocz.com/consumer/download/drivers

查看dmesg信息, 有几条内核被污染的告警.

# dmesg
[   11.568655] oczpcie: module verification failed: signature and/or required key missing - tainting kernel
[   11.590198] oczvca: module license 'OCZ' taints kernel.
[   11.590200] oczvca: module license 'OCZ' taints kernel.
[   11.590204] Disabling lock debugging due to kernel taint

同时内核污染状态如下 :

[root@localhost ~]# sysctl -a|grep tain
kernel.tainted = 6147

数字组合如下 :

1 - A module with a non-GPL license has been loaded, thisincludes modules with no license.Set by modutils >= 2.4.9 and module-init-tools.
2 - A module was force loaded by insmod -f.Set by modutils >= 2.4.9 and module-init-tools.
2048 - The system is working around a severe firmware bug.
4096 - An out-of-tree module has been loaded.

卸载rpm包, 重新启动系统正常, 还有一个告警和OCZ驱动RPM包无关.

[root@localhost ~]# sysctl -a|grep taint
kernel.tainted = 2048
2048 - The system is working around a severe firmware bug.

dmesg信息如下  :

[    0.407649] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[    0.407722] ACPI Error: [CDW1] Namespace lookup failure, AE_NOT_FOUND (20130517/psargs-359)
[    0.407727] ACPI Error: Method parse/execution failed [\_SB_._OSC] (Node ffff8817ba92b870), AE_NOT_FOUND (20130517/psparse-536)
[    0.407915] ACPI: Interpreter enabled
[    0.407920] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S1_] (20130517/hwxface-571)
[    0.407924] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20130517/hwxface-571)
[    0.407927] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S3_] (20130517/hwxface-571)
[    0.407939] ACPI: (supports S0 S4 S5)
[    0.407940] ACPI: Using IOAPIC for interrupt routing
[    0.408037] HEST: Table parsing has been initialized.
[    0.408041] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    0.408095] ACPI: No dock devices found.
[    0.412782] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    0.412790] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
[    0.412903] acpi PNP0A08:00: PCIe AER handled by firmware
[    0.413128] acpi PNP0A08:00: _OSC: OS now controls [PCIeHotplug PME PCIeCapability]

OCZ revodrive 3 x2 pcie SSD由默认的mvsas驱动.

Disk /dev/sdc: 120.0 GB, 120034123776 bytes, 234441648 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x60d0fce7Device Boot      Start         End      Blocks   Id  System
/dev/sdc1            2048   468881407   234439680   83  LinuxDisk /dev/sdd: 120.0 GB, 120034123776 bytes, 234441648 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

参数如下 :

[root@localhost modprobe.d]# ll /sys/module/mvsas/parameters/*
-r--r--r-- 1 root root 4096 Nov 27 00:06 /sys/module/mvsas/parameters/collector
[root@localhost modprobe.d]# cat /sys/module/mvsas/parameters/*
1
[root@localhost modprobe.d]# modinfo mvsas
filename:       /lib/modules/3.10.0-123.el7.x86_64/kernel/drivers/scsi/mvsas/mvsas.ko
license:        GPL
version:        0.8.16
description:    Marvell 88SE6440 SAS/SATA controller driver
author:         Jeff Garzik <jgarzik@pobox.com>
srcversion:     4FF6FB6153E662306329CB3
alias:          pci:v00001B85d00001084sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001083sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001080sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001044sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001043sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001042sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001041sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001040sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001022sv*sd*bc*sc*i*
alias:          pci:v00001B85d00001021sv*sd*bc*sc*i*
alias:          pci:v00001B4Bd00009485sv*sd00009480bc*sc*i*
alias:          pci:v00001B4Bd00009445sv*sd00009480bc*sc*i*
alias:          pci:v00001B4Bd00009480sv*sd00009480bc*sc*i*
alias:          pci:v00001103d00002760sv*sd*bc*sc*i*
alias:          pci:v00001103d00002744sv*sd*bc*sc*i*
alias:          pci:v00001103d00002740sv*sd*bc*sc*i*
alias:          pci:v00001103d00002722sv*sd*bc*sc*i*
alias:          pci:v00001103d00002721sv*sd*bc*sc*i*
alias:          pci:v00001103d00002720sv*sd*bc*sc*i*
alias:          pci:v00001103d00002710sv*sd*bc*sc*i*
alias:          pci:v00009005d00000450sv*sd*bc*sc*i*
alias:          pci:v000017D3d00001320sv*sd*bc*sc*i*
alias:          pci:v000017D3d00001300sv*sd*bc*sc*i*
alias:          pci:v000011ABd00009180sv*sd*bc*sc*i*
alias:          pci:v000011ABd00009480sv*sd*bc*sc*i*
alias:          pci:v000011ABd00006485sv*sd*bc*sc*i*
alias:          pci:v000011ABd00006440sv*sd*bc*sc*i*
alias:          pci:v000011ABd00006440sv*sd00006480bc*sc*i*
alias:          pci:v000011ABd00006340sv*sd*bc*sc*i*
alias:          pci:v000011ABd00006320sv*sd*bc*sc*i*
depends:        libsas,scsi_transport_sas
intree:         Y
vermagic:       3.10.0-123.el7.x86_64 SMP mod_unload modversions
signer:         CentOS Linux kernel signing key
sig_key:        BC:83:D0:FE:70:C6:2F:AB:1C:58:B4:EB:AA:95:E3:93:61:28:FC:F4
sig_hashalgo:   sha256
parm:           collector:If greater than one, tells the SAS Layer to run in Task CollectorMode.  If 1 or 0, tells the SAS Layer to run in Direct Mode.The mvsas SAS LLDD supports both modes.Default: 1 (Direct Mode).(int)

mvsas 参数可更改, 但是依旧是240变成2块120G的块设备.

[root@localhost modprobe.d]# pwd
/etc/modprobe.d
[root@localhost modprobe.d]# vi mvsas.conf
options mvsas collector=2
[root@localhost modprobe.d]# rmmod mvsas && modprobe mvsas

1. https://www.kernel.org/doc/Documentation/sysctl/kernel.txt

tainted:Non-zero if the kernel has been tainted.  Numeric values, which
can be ORed together:1 - A module with a non-GPL license has been loaded, thisincludes modules with no license.Set by modutils >= 2.4.9 and module-init-tools.2 - A module was force loaded by insmod -f.Set by modutils >= 2.4.9 and module-init-tools.4 - Unsafe SMP processors: SMP with CPUs not designed for SMP.8 - A module was forcibly unloaded from the system by rmmod -f.16 - A hardware machine check error occurred on the system.32 - A bad page was discovered on the system.64 - The user has asked that the system be marked "tainted".  Thiscould be because they are running software that directly modifiesthe hardware, or for other reasons.128 - The system has died.256 - The ACPI DSDT has been overridden with one supplied by the userinstead of using the one provided by the hardware.512 - A kernel warning has occurred.
1024 - A module from drivers/staging was loaded.
2048 - The system is working around a severe firmware bug.
4096 - An out-of-tree module has been loaded.
8192 - An unsigned module has been loaded in a kernel supporting modulesignature.
16384 - A soft lockup has previously occurred on the system.

2. https://www.kernel.org/doc/Documentation/module-signing.txt

==========================
CONFIGURING MODULE SIGNING
==========================The module signing facility is enabled by going to the "Enable Loadable Module
Support" section of the kernel configuration and turning onCONFIG_MODULE_SIG   "Module signature verification"This has a number of options available:(1) "Require modules to be validly signed" (CONFIG_MODULE_SIG_FORCE)This specifies how the kernel should deal with a module that has asignature for which the key is not known or a module that is unsigned.If this is off (ie. "permissive"), then modules for which the key is notavailable and modules that are unsigned are permitted, but the kernel willbe marked as being tainted, and the concerned modules will be marked astainted, shown with the character 'E'.If this is on (ie. "restrictive"), only modules that have a validsignature that can be verified by a public key in the kernel's possessionwill be loaded.  All other modules will generate an error.Irrespective of the setting here, if the module has a signature block thatcannot be parsed, it will be rejected out of hand.(2) "Automatically sign all modules" (CONFIG_MODULE_SIG_ALL)If this is on then modules will be automatically signed during themodules_install phase of a build.  If this is off, then the modules mustbe signed manually using:scripts/sign-file(3) "Which hash algorithm should modules be signed with?"This presents a choice of which hash algorithm the installation phase willsign the modules with:CONFIG_MODULE_SIG_SHA1     "Sign modules with SHA-1"CONFIG_MODULE_SIG_SHA224 "Sign modules with SHA-224"CONFIG_MODULE_SIG_SHA256   "Sign modules with SHA-256"CONFIG_MODULE_SIG_SHA384   "Sign modules with SHA-384"CONFIG_MODULE_SIG_SHA512   "Sign modules with SHA-512"The algorithm selected here will also be built into the kernel (ratherthan being a module) so that modules signed with that algorithm can havetheir signatures checked without causing a dependency loop.

3. http://ocz.com/consumer/download/drivers