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Message-ID: <20080801095105.GA18055@elte.hu> Date: Fri, 1 Aug 2008 11:51:05 +0200 From: Ingo Molnar <mingo@...e.hu> To: Rene Herman <rene.herman@...access.nl> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Suresh Siddha <suresh.b.siddha@...el.com>, Wim Van Sebroeck <wim@...ana.be>, Pádraig Brady <P@...igBrady.com>, Andi Kleen <andi@...stfloor.org>, "H. Peter Anvin" <hpa@...or.com>, "tglx@...utronix.de" <tglx@...utronix.de>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, "arjan@...ux.intel.com" <arjan@...ux.intel.com>, "roland@...hat.com" <roland@...hat.com>, "drepper@...hat.com" <drepper@...hat.com>, "mikpe@...uu.se" <mikpe@...uu.se>, "chrisw@...s-sol.org" <chrisw@...s-sol.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [patch 0/9] x86, xsave: xsave/xrstor support * Rene Herman <rene.herman@...access.nl> wrote: > On 01-08-08 00:50, Ingo Molnar wrote: > >> there are a handful of old ISA-ish drivers that can crash randconfig >> kernels in various ways. [indefinite lockups, crashes, stomped-over >> hardware, non-working keyboard, etc.] >> >> I mapped most of them out via many months of trial-and-error - but it >> would still be nice to have some separate config option to disable the >> known ones. CONFIG_ALLOW_NON_GENERIC or something like that - which i >> would unset in the randconfig runs. >> >> ( They are not CONFIG_BROKEN per se, because often it's hardware that >> cannot be probed in any reliable way - the driver just assumes it's >> there. ) > > If you have a list, I might be able to do something about some of > them. find attached below a newer version of the original list i published half a year ago: http://people.redhat.com/mingo/auto-qa-patches/Kconfig-qa.patch these are just pragmatic local hacks to get things going. (There are more per machine quirks as well.) i have not used a BROKEN annotation because CONFIG_BROKEN is impractical: it just kills code altogether, indiscriminately. There's no way for users to enable CONFIG_BROKEN in the upstream kernel - nothing selects it and it's not an interactive option either. So by all means if we mark a driver or a kernel feature as CONFIG_BROKEN, it's killed altogether for all practical purposes. What we'd need is some more gradual approach: for example a way to mark "drivers that are not expected to boot on a whitebox PC", without removing them altogether via a CONFIG_BROKEN dependency - often it's hardware that cannot be probed safely. Ingo ------------------> Index: linux/security/smack/Kconfig =================================================================== --- linux.orig/security/smack/Kconfig +++ linux/security/smack/Kconfig @@ -1,6 +1,9 @@ config SECURITY_SMACK bool "Simplified Mandatory Access Control Kernel Support" depends on NETLABEL && SECURITY_NETWORK + # breaks networking (TCP connections) + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT default n help This selects the Simplified Mandatory Access Control Kernel. Index: linux/drivers/block/Kconfig =================================================================== --- linux.orig/drivers/block/Kconfig +++ linux/drivers/block/Kconfig @@ -71,6 +71,11 @@ config BLK_DEV_XD config PARIDE tristate "Parallel port IDE device support" depends on PARPORT_PC + + # the probe can hang during bootup on non-PARIDE boxes + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if PARIDE = y + ---help--- There are many external CD-ROM and disk devices that connect through your computer's parallel port. Most of them are actually IDE devices Index: linux/drivers/i2c/busses/Kconfig =================================================================== --- linux.orig/drivers/i2c/busses/Kconfig +++ linux/drivers/i2c/busses/Kconfig @@ -610,6 +610,11 @@ config I2C_ELEKTOR config I2C_PCA_ISA tristate "PCA9564 on an ISA bus" depends on ISA + + # takes away IRQ10 on venus and thus breaks e1000 + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT + select I2C_ALGOPCA default n help Index: linux/drivers/ide/Kconfig =================================================================== --- linux.orig/drivers/ide/Kconfig +++ linux/drivers/ide/Kconfig @@ -9,6 +9,11 @@ config HAVE_IDE menuconfig IDE tristate "ATA/ATAPI/MFM/RLL support" depends on HAVE_IDE + + # my test box expects /dev/sda, not /dev/hda + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if IDE = y + depends on BLOCK ---help--- If you say Y here, your kernel will be able to manage low cost mass Index: linux/drivers/isdn/icn/Kconfig =================================================================== --- linux.orig/drivers/isdn/icn/Kconfig +++ linux/drivers/isdn/icn/Kconfig @@ -4,6 +4,11 @@ config ISDN_DRV_ICN tristate "ICN 2B and 4B support" depends on ISA + + # crashed on venus, see config-Sun_May_25_11_00_41_CEST_2008.bad + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT + help This enables support for two kinds of ISDN-cards made by a German company called ICN. 2B is the standard version for a single ISDN Index: linux/drivers/media/video/Kconfig =================================================================== --- linux.orig/drivers/media/video/Kconfig +++ linux/drivers/media/video/Kconfig @@ -481,6 +481,9 @@ config VIDEO_SAA6588 config VIDEO_PMS tristate "Mediavision Pro Movie Studio Video For Linux" depends on ISA && VIDEO_V4L1 + # hung on bootup on mars, see config-Wed_Jun__4_14_33_56_CEST_2008.bad + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT help Say Y if you have such a thing. Index: linux/drivers/mtd/Kconfig =================================================================== --- linux.orig/drivers/mtd/Kconfig +++ linux/drivers/mtd/Kconfig @@ -1,6 +1,11 @@ menuconfig MTD tristate "Memory Technology Device (MTD) support" depends on HAS_IOMEM + + # dangerous to enable - sometimes hangs on probe + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if MTD = y + help Memory Technology Devices are flash, RAM and similar chips, often used for solid state file systems on embedded devices. This option Index: linux/drivers/net/appletalk/Kconfig =================================================================== --- linux.orig/drivers/net/appletalk/Kconfig +++ linux/drivers/net/appletalk/Kconfig @@ -52,6 +52,11 @@ config LTPC config COPS tristate "COPS LocalTalk PC support" depends on DEV_APPLETALK && (ISA || EISA) + # + # Can hang + # + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if COPS = y help This allows you to use COPS AppleTalk cards to connect to LocalTalk networks. You also need version 1.3.3 or later of the netatalk Index: linux/drivers/scsi/Kconfig =================================================================== --- linux.orig/drivers/scsi/Kconfig +++ linux/drivers/scsi/Kconfig @@ -1520,6 +1520,11 @@ config SCSI_NSP32 config SCSI_DEBUG tristate "SCSI debugging host simulator" depends on SCSI + + # this creates a fake /dev/sda which confuses the bzImage bootup + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if SCSI_DEBUG = y + help This is a host adapter simulator that can simulate multiple hosts each with multiple dummy SCSI devices (disks). It defaults to one Index: linux/drivers/video/Kconfig =================================================================== --- linux.orig/drivers/video/Kconfig +++ linux/drivers/video/Kconfig @@ -236,6 +236,11 @@ comment "Frame buffer hardware drivers" config FB_CIRRUS tristate "Cirrus Logic support" + + # can hang on a box without this hardware + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if FB_CIRRUS = y + depends on FB && (ZORRO || PCI) select FB_CFB_FILLRECT select FB_CFB_COPYAREA @@ -546,6 +551,11 @@ config FB_CT65550 config FB_ASILIANT bool "Asiliant (Chips) 69000 display support" + + # can hang on a box without this hardware + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if FB_ASILIANT = y + depends on (FB = y) && PCI select FB_CFB_FILLRECT select FB_CFB_COPYAREA @@ -564,6 +574,11 @@ config FB_IMSTT config FB_VGA16 tristate "VGA 16-color graphics support" + + # can hang on a box without this hardware + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if FB_VGA16 = y + depends on FB && (X86 || PPC) select FB_CFB_FILLRECT select FB_CFB_COPYAREA @@ -674,6 +689,11 @@ config FB_UVESA config FB_VESA bool "VESA VGA graphics support" + + # can hang on a box without this hardware + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if FB_VESA = y + depends on (FB = y) && X86 select FB_CFB_FILLRECT select FB_CFB_COPYAREA @@ -1299,6 +1319,11 @@ config FB_MATROX_MULTIHEAD config FB_RADEON tristate "ATI Radeon display support" + + # can hang on a box without this hardware + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if FB_RADEON = y + depends on FB && PCI select FB_BACKLIGHT if FB_RADEON_BACKLIGHT select FB_MODE_HELPERS @@ -1581,6 +1606,11 @@ config FB_VT8623 config FB_CYBLA tristate "Cyberblade/i1 support" + + # can hang on a box without this hardware + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if FB_CYBLA = y + depends on FB && PCI && X86_32 && !64BIT select FB_CFB_IMAGEBLIT select VIDEO_SELECT @@ -2006,6 +2036,11 @@ config FB_SH7760 config FB_VIRTUAL tristate "Virtual Frame Buffer support (ONLY FOR TESTING!)" + + # can hang on a box without this hardware + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if FB_VIRTUAL = y + depends on FB select FB_SYS_FILLRECT select FB_SYS_COPYAREA Index: linux/drivers/video/console/Kconfig =================================================================== --- linux.orig/drivers/video/console/Kconfig +++ linux/drivers/video/console/Kconfig @@ -61,6 +61,11 @@ config VIDEO_SELECT config MDA_CONSOLE depends on !M68K && !PARISC && ISA + + # can hang on a box without this hardware + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if MDA_CONSOLE = y + tristate "MDA text console (dual-headed) (EXPERIMENTAL)" ---help--- Say Y here if you have an old MDA or monochrome Hercules graphics @@ -113,6 +118,10 @@ config DUMMY_CONSOLE_ROWS config FRAMEBUFFER_CONSOLE tristate "Framebuffer Console support" + + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if FRAMEBUFFER_CONSOLE = y + depends on FB select CRC32 help Index: linux/drivers/watchdog/Kconfig =================================================================== --- linux.orig/drivers/watchdog/Kconfig +++ linux/drivers/watchdog/Kconfig @@ -324,6 +324,12 @@ config SC520_WDT config EUROTECH_WDT tristate "Eurotech CPU-1220/1410 Watchdog Timer" depends on X86 + + # this ISA driver puts itself on IRQ10 - if IRQ10 happens to + # trigger then that will cause a watchdog-initiated reboot + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if EUROTECH_WDT = y + help Enable support for the watchdog timer on the Eurotech CPU-1220 and CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product @@ -830,6 +836,11 @@ config MIXCOMWD config WDT tristate "WDT Watchdog timer" depends on ISA + + # this ISA driver sits on IRQ11 by default - blocking forcedeth + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT if WDT = y + ---help--- If you have a WDT500P or WDT501P watchdog board, say Y here, otherwise N. It is not possible to probe for this board, which means Index: linux/fs/Kconfig =================================================================== --- linux.orig/fs/Kconfig +++ linux/fs/Kconfig @@ -1636,6 +1636,11 @@ config NFS_V4 config ROOT_NFS bool "Root file system on NFS" depends on NFS_FS=y && IP_PNP + + # hangs a non-root-NFS box during bootup + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT + help If you want your system to mount its root file system via NFS, choose Y here. This is common practice for managing systems Index: linux/security/Kconfig =================================================================== --- linux.orig/security/Kconfig +++ linux/security/Kconfig @@ -85,6 +85,11 @@ config SECURITY_FILE_CAPABILITIES config SECURITY_ROOTPLUG bool "Root Plug Support" depends on USB=y && SECURITY + + # fails with hard-to-debug "could not find init" boot failure + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT + help This is a sample LSM module that should only be used as such. It prevents any programs running with egid == 0 if a specific Index: linux/security/selinux/Kconfig =================================================================== --- linux.orig/security/selinux/Kconfig +++ linux/security/selinux/Kconfig @@ -100,6 +100,11 @@ config SECURITY_SELINUX_CHECKREQPROT_VAL config SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT bool "NSA SELinux enable new secmark network controls by default" depends on SECURITY_SELINUX + + # old system booted up with this cannot ssh out + depends on BROKEN_BOOT_ALLOWED + select BROKEN_BOOT + default n help This option determines whether the new secmark-based network -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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