Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Marco Berizzi]

Hi everybody.

I have just upgraded my PC from 768MB RAM to 1GB.
I have recompiled the kernel (2.4.14) for hi mem support (4GB).

Now it's appening a very strange behaviour.
I have several file system on the same disk (vfat file system). I have
compiled vfat driver as a module. So before try to mount I must issue a
'modprobe vfat'. I'm using Slackware 8.0. modutils version is 2.4.6

Then if I try to copy a file from that filesystem to the root filesystem
I get this error:

Kernel panic: too few segs for DMA mappings increase AHC_NSEG

Usually this is the procedure:

root login
modprobe vfat
mount /dev/sda2 /mnt   (to mount the fat partition)
cd /usr/src
cp /mnt/linux/kernel/linux-2.2.20.tar.bz2 . (I want to copy kernel
source tarball from the vfat partition to /usr/src)
CRASH..........

My MB is ABIT KT7A (bios rev ID 65  11/07/2001). Two 512 MB SDRAM
(takei).
Other HW: AHA 39160, SCSI IBM HD DDYS 18130, Matrox G450.
gcc version 2.95.3, binutils 2.10.91.0.4 (***not the original slack
8.0***, I have downgraded it for Oracle 9i)

If I compile a kernel without hi mem support all is fine.

Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Jens Axboe]

[-- Attachment #1: Type: text/plain, Size: 740 bytes --]

On Mon, Nov 19 2001, Marco Berizzi wrote:
> Hi everybody.
> 
> I have just upgraded my PC from 768MB RAM to 1GB.
> I have recompiled the kernel (2.4.14) for hi mem support (4GB).
> 
> Now it's appening a very strange behaviour.
> I have several file system on the same disk (vfat file system). I have
> compiled vfat driver as a module. So before try to mount I must issue a
> 'modprobe vfat'. I'm using Slackware 8.0. modutils version is 2.4.6
> 
> Then if I try to copy a file from that filesystem to the root filesystem
> I get this error:
> 
> Kernel panic: too few segs for DMA mappings increase AHC_NSEG

Aha! Finally someone that can provoke this easily. Could you please
apply attached patch and reproduce? Thanks.

-- 
Jens Axboe


[-- Attachment #2: aic7xxx-nsegs-1 --]
[-- Type: text/plain, Size: 1060 bytes --]

--- drivers/scsi/aic7xxx/aic7xxx_linux.c~	Mon Nov 19 10:36:12 2001
+++ drivers/scsi/aic7xxx/aic7xxx_linux.c	Mon Nov 19 10:43:26 2001
@@ -624,9 +624,10 @@
 {
 	int	 consumed;
 
-	if ((scb->sg_count + 1) > AHC_NSEG)
-		panic("Too few segs for dma mapping.  "
-		      "Increase AHC_NSEG\n");
+	if ((scb->sg_count + 1) > AHC_NSEG) {
+		printk("Too few segs for dma mapping. Increase AHC_NSEG\n");
+		return -1;
+	}
 
 	consumed = 1;
 	sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
@@ -1674,6 +1675,13 @@
 				len = sg_dma_len(cur_seg);
 				consumed = ahc_linux_map_seg(ahc, scb,
 							     sg, addr, len);
+				if (consumed == -1) {
+					printk("aic7xxx: scsi segs %d,
+						pci segs %d, aic segs %d\n",
+						cmd->use_sg, nseg,
+						scb->sg_count);
+					BUG();
+				}
 				sg += consumed;
 				scb->sg_count += consumed;
 				cur_seg++;
@@ -1705,6 +1713,8 @@
 			scb->sg_count = ahc_linux_map_seg(ahc, scb,
 							  sg, addr,
 							  cmd->request_bufflen);
+			if (scb->sg_count == -1)
+				BUG();
 			sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
 
 			/*

Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Marco Berizzi]

...not good news.
Same behaviour: without hi mem support all right. With hi mem support
(4GB) I get this error on console, after a kernel dump:

SCSI1:0:0:0 attempt to queue an abort message
SCSI1:0:0:0 command not found
aic7xxx_abort returns 0x2002

Then the system freeze completely, so I press the reset button.
At the startup INIT calls fsck and when the checking is at about 55% it
displays this message:

SCSI1:A:0:0 locking max tag count at 128

then the following startup procedure goes well.
I want to tell you that with this kernel (hi mem support enabled), all
is working perfectly (I can compile a new working kernel, for example).
X Window (4.1) plus kde is working well.
Only when I mount a vfat filesystem type and then I try to copy a file
to the root partition I get this error.
Another point: I usually build only mass storage driver in the kernel
(Adaptec AHA 39160 bios rev 3.10). I build as modules all other HW (nic,
sound, USB), however only the SB PCI512 is loaded in this situation. I
haven't any IDE device just one SCSI HD (IBM DDYS-T18350N firmware rev
S93E) and one Plextor SCSI cdrom (UltraPlex 40max PX-40TS firmware
revision 1.04).

----- Original Message -----
From: "Jens Axboe" <axboe@suse.de>
To: "Marco Berizzi" <pupilla@hotmail.com>
Cc: <linux-kernel@vger.kernel.org>
Sent: Monday, November 19, 2001 10:44 AM
Subject: Re: Kernel Panic: too few segs for DMA mapping increase
AHC_NSEG


> On Mon, Nov 19 2001, Marco Berizzi wrote:
> > Hi everybody.
> >
> > I have just upgraded my PC from 768MB RAM to 1GB.
> > I have recompiled the kernel (2.4.14) for hi mem support (4GB).
> >
> > Now it's appening a very strange behaviour.
> > I have several file system on the same disk (vfat file system). I
have
> > compiled vfat driver as a module. So before try to mount I must
issue a
> > 'modprobe vfat'. I'm using Slackware 8.0. modutils version is 2.4.6
> >
> > Then if I try to copy a file from that filesystem to the root
filesystem
> > I get this error:
> >
> > Kernel panic: too few segs for DMA mappings increase AHC_NSEG
>
> Aha! Finally someone that can provoke this easily. Could you please
> apply attached patch and reproduce? Thanks.
>
> --
> Jens Axboe
>
>

Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Marco Berizzi]

Always me.
Just tried with a fresh 2.4.15 kernel: same behaviour.
I get a little different message when the hi mem enabled kernel bombs:

Kernel Panic: too few segs for DMA mapping increase AHC_NSEG
Kernel Panic: too few segs for DMA mapping increase AHC_NSEG
Kernel Panic: too few segs for DMA mapping increase AHC_NSEG
In interrupt handler - not syncing

And the system freeze completely.

PS: I tried to mount an ISO (with joilet ext) cdrom and copy some file (the tarball kernel) and the system was fine (iso/joylet filesystem driver was built in the kernel).
It seems to panic only with vfat filesystem. I remember you that I build vfat driver as a kernel module, then I load it with 'modprobe vfat'.


----- Original Message ----- 
From: "Marco Berizzi" <pupilla@hotmail.com>
To: "Jens Axboe" <axboe@suse.de>
Cc: <linux-kernel@vger.kernel.org>
Sent: Wednesday, November 21, 2001 8:46 AM
Subject: Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG


> ...not good news.
> Same behaviour: without hi mem support all right. With hi mem support
> (4GB) I get this error on console, after a kernel dump:
> 
> SCSI1:0:0:0 attempt to queue an abort message
> SCSI1:0:0:0 command not found
> aic7xxx_abort returns 0x2002
> 
> Then the system freeze completely, so I press the reset button.
> At the startup INIT calls fsck and when the checking is at about 55% it
> displays this message:
> 
> SCSI1:A:0:0 locking max tag count at 128
> 
> then the following startup procedure goes well.
> I want to tell you that with this kernel (hi mem support enabled), all
> is working perfectly (I can compile a new working kernel, for example).
> X Window (4.1) plus kde is working well.
> Only when I mount a vfat filesystem type and then I try to copy a file
> to the root partition I get this error.
> Another point: I usually build only mass storage driver in the kernel
> (Adaptec AHA 39160 bios rev 3.10). I build as modules all other HW (nic,
> sound, USB), however only the SB PCI512 is loaded in this situation. I
> haven't any IDE device just one SCSI HD (IBM DDYS-T18350N firmware rev
> S93E) and one Plextor SCSI cdrom (UltraPlex 40max PX-40TS firmware
> revision 1.04).
> 
> ----- Original Message -----
> From: "Jens Axboe" <axboe@suse.de>
> To: "Marco Berizzi" <pupilla@hotmail.com>
> Cc: <linux-kernel@vger.kernel.org>
> Sent: Monday, November 19, 2001 10:44 AM
> Subject: Re: Kernel Panic: too few segs for DMA mapping increase
> AHC_NSEG
> 
> 
> > On Mon, Nov 19 2001, Marco Berizzi wrote:
> > > Hi everybody.
> > >
> > > I have just upgraded my PC from 768MB RAM to 1GB.
> > > I have recompiled the kernel (2.4.14) for hi mem support (4GB).
> > >
> > > Now it's appening a very strange behaviour.
> > > I have several file system on the same disk (vfat file system). I
> have
> > > compiled vfat driver as a module. So before try to mount I must
> issue a
> > > 'modprobe vfat'. I'm using Slackware 8.0. modutils version is 2.4.6
> > >
> > > Then if I try to copy a file from that filesystem to the root
> filesystem
> > > I get this error:
> > >
> > > Kernel panic: too few segs for DMA mappings increase AHC_NSEG
> >
> > Aha! Finally someone that can provoke this easily. Could you please
> > apply attached patch and reproduce? Thanks.
> >
> > --
> > Jens Axboe
> >
> >
> 

Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Marco Berizzi]

Just tried with 2.2.20: all is working correctly, both with and without hi mem support.
No kernel panic.

----- Original Message ----- 
From: "Marco Berizzi" <pupilla@hotmail.com>
To: "Jens Axboe" <axboe@suse.de>
Cc: <linux-kernel@vger.kernel.org>
Sent: Wednesday, November 21, 2001 8:46 AM
Subject: Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG


> ...not good news.
> Same behaviour: without hi mem support all right. With hi mem support
> (4GB) I get this error on console, after a kernel dump:
> 
> SCSI1:0:0:0 attempt to queue an abort message
> SCSI1:0:0:0 command not found
> aic7xxx_abort returns 0x2002
> 
> Then the system freeze completely, so I press the reset button.
> At the startup INIT calls fsck and when the checking is at about 55% it
> displays this message:
> 
> SCSI1:A:0:0 locking max tag count at 128
> 
> then the following startup procedure goes well.
> I want to tell you that with this kernel (hi mem support enabled), all
> is working perfectly (I can compile a new working kernel, for example).
> X Window (4.1) plus kde is working well.
> Only when I mount a vfat filesystem type and then I try to copy a file
> to the root partition I get this error.
> Another point: I usually build only mass storage driver in the kernel
> (Adaptec AHA 39160 bios rev 3.10). I build as modules all other HW (nic,
> sound, USB), however only the SB PCI512 is loaded in this situation. I
> haven't any IDE device just one SCSI HD (IBM DDYS-T18350N firmware rev
> S93E) and one Plextor SCSI cdrom (UltraPlex 40max PX-40TS firmware
> revision 1.04).
> 
> ----- Original Message -----
> From: "Jens Axboe" <axboe@suse.de>
> To: "Marco Berizzi" <pupilla@hotmail.com>
> Cc: <linux-kernel@vger.kernel.org>
> Sent: Monday, November 19, 2001 10:44 AM
> Subject: Re: Kernel Panic: too few segs for DMA mapping increase
> AHC_NSEG
> 
> 
> > On Mon, Nov 19 2001, Marco Berizzi wrote:
> > > Hi everybody.
> > >
> > > I have just upgraded my PC from 768MB RAM to 1GB.
> > > I have recompiled the kernel (2.4.14) for hi mem support (4GB).
> > >
> > > Now it's appening a very strange behaviour.
> > > I have several file system on the same disk (vfat file system). I
> have
> > > compiled vfat driver as a module. So before try to mount I must
> issue a
> > > 'modprobe vfat'. I'm using Slackware 8.0. modutils version is 2.4.6
> > >
> > > Then if I try to copy a file from that filesystem to the root
> filesystem
> > > I get this error:
> > >
> > > Kernel panic: too few segs for DMA mappings increase AHC_NSEG
> >
> > Aha! Finally someone that can provoke this easily. Could you please
> > apply attached patch and reproduce? Thanks.
> >
> > --
> > Jens Axboe
> >
> >
> 

Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Marco Berizzi]

[-- Attachment #1: Type: text/plain, Size: 1520 bytes --]

I have upgraded my PC from 768MB RAM to 1GB.
I have recompiled the kernel (2.4.16) for hi mem support (4GB).

I have several file system on the same disk (vfat file system). I have
compiled vfat driver both in the main kernel and as a module. When I
load the module I issue a
'modprobe vfat' and I get this message (only with hi mem kernel
support):

Warning: loading /lib/modules/2.4.16/kernel/fs/vfat/vfat.o will taint
the kernel: no license
 I'm using Slackware 8.0. + modutils 2.4.12

Then if I try to copy a file from that filesystem to the root filesystem
I get this error:

Kernel panic: too few segs for DMA mappings increase AHC_NSEG

Kernel panic: too few segs for DMA mappings increase AHC_NSEG

Usually this is the procedure:

root login
modprobe vfat
mount /dev/sda2 /mnt   (to mount the fat partition)
cd /usr/src
cp /mnt/linux/kernel/linux-2.2.20.tar.bz2 . (I want to copy kernel
source tarball from the vfat partition to /usr/src)
CRASH..........

Then the system freeze completely, so I press the reset button.
At the startup INIT calls fsck and when the checking is at about 55% it
displays this message:

SCSI1:A:0:0 locking max tag count at 128

then the following startup procedure goes well.

Kernel 2.2.20 works perfectly, both with and without hi mem support.

My MB is ABIT KT7A (bios rev ID 65  11/07/2001). Two 512 MB SDRAM
(takei).
Other HW: AHA 39160, SCSI IBM HD DDYS 18130, Matrox G450.
gcc version 2.95.3

If I compile a kernel without hi mem support all is fine.

Attach contain .config

[-- Attachment #2: .config --]
[-- Type: application/octet-stream, Size: 18078 bytes --]

#
# Automatically generated by make menuconfig: don't edit
#
CONFIG_X86=y
CONFIG_ISA=y
# CONFIG_SBUS is not set
CONFIG_UID16=y

#
# Code maturity level options
#
# CONFIG_EXPERIMENTAL is not set

#
# Loadable module support
#
CONFIG_MODULES=y
# CONFIG_MODVERSIONS is not set
# CONFIG_KMOD is not set

#
# Processor type and features
#
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
CONFIG_MK7=y
# CONFIG_MCRUSOE is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MCYRIXIII is not set
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_CMPXCHG=y
CONFIG_X86_XADD=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_TSC=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_USE_3DNOW=y
CONFIG_X86_PGE=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
# CONFIG_TOSHIBA is not set
# CONFIG_I8K is not set
# CONFIG_MICROCODE is not set
# CONFIG_X86_MSR is not set
# CONFIG_X86_CPUID is not set
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_HIGHMEM=y
# CONFIG_MATH_EMULATION is not set
# CONFIG_MTRR is not set
# CONFIG_SMP is not set
# CONFIG_X86_UP_APIC is not set
# CONFIG_X86_UP_IOAPIC is not set

#
# General setup
#
CONFIG_NET=y
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_NAMES=y
# CONFIG_EISA is not set
# CONFIG_MCA is not set
# CONFIG_HOTPLUG is not set
# CONFIG_PCMCIA is not set
# CONFIG_HOTPLUG_PCI is not set
CONFIG_SYSVIPC=y
# CONFIG_BSD_PROCESS_ACCT is not set
CONFIG_SYSCTL=y
CONFIG_KCORE_ELF=y
# CONFIG_KCORE_AOUT is not set
CONFIG_BINFMT_AOUT=y
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=y
# CONFIG_PM is not set
# CONFIG_APM is not set

#
# Memory Technology Devices (MTD)
#
# CONFIG_MTD is not set

#
# Parallel port support
#
# CONFIG_PARPORT is not set

#
# Plug and Play configuration
#
# CONFIG_PNP is not set
# CONFIG_ISAPNP is not set

#
# Block devices
#
CONFIG_BLK_DEV_FD=y
# CONFIG_BLK_DEV_XD is not set
# CONFIG_PARIDE is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_LOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_BLK_DEV_INITRD is not set

#
# Multi-device support (RAID and LVM)
#
# CONFIG_MD is not set
# CONFIG_BLK_DEV_MD is not set
# CONFIG_MD_LINEAR is not set
# CONFIG_MD_RAID0 is not set
# CONFIG_MD_RAID1 is not set
# CONFIG_MD_RAID5 is not set
# CONFIG_MD_MULTIPATH is not set
# CONFIG_BLK_DEV_LVM is not set

#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_MMAP is not set
# CONFIG_NETLINK is not set
# CONFIG_NETFILTER is not set
# CONFIG_FILTER is not set
CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_INET_ECN is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_DECNET is not set
# CONFIG_BRIDGE is not set

#
# QoS and/or fair queueing
#
# CONFIG_NET_SCHED is not set

#
# Telephony Support
#
# CONFIG_PHONE is not set
# CONFIG_PHONE_IXJ is not set
# CONFIG_PHONE_IXJ_PCMCIA is not set

#
# ATA/IDE/MFM/RLL support
#
# CONFIG_IDE is not set
# CONFIG_BLK_DEV_IDE_MODES is not set
# CONFIG_BLK_DEV_HD is not set

#
# SCSI support
#
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_SD_EXTRA_DEVS=40
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=y
# CONFIG_BLK_DEV_SR_VENDOR is not set
CONFIG_SR_EXTRA_DEVS=2
# CONFIG_CHR_DEV_SG is not set
CONFIG_SCSI_DEBUG_QUEUES=y
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
# CONFIG_SCSI_LOGGING is not set

#
# SCSI low-level drivers
#
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_7000FASST is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AHA152X is not set
# CONFIG_SCSI_AHA1542 is not set
# CONFIG_SCSI_AHA1740 is not set
CONFIG_SCSI_AIC7XXX=y
CONFIG_AIC7XXX_CMDS_PER_DEVICE=253
CONFIG_AIC7XXX_RESET_DELAY_MS=15000
# CONFIG_AIC7XXX_BUILD_FIRMWARE is not set
# CONFIG_SCSI_DPT_I2O is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_IN2000 is not set
# CONFIG_SCSI_AM53C974 is not set
# CONFIG_SCSI_MEGARAID is not set
# CONFIG_SCSI_BUSLOGIC is not set
# CONFIG_SCSI_CPQFCTS is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_DTC3280 is not set
# CONFIG_SCSI_EATA is not set
# CONFIG_SCSI_EATA_DMA is not set
# CONFIG_SCSI_EATA_PIO is not set
# CONFIG_SCSI_FUTURE_DOMAIN is not set
# CONFIG_SCSI_GDTH is not set
# CONFIG_SCSI_GENERIC_NCR5380 is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_NCR53C406A is not set
# CONFIG_SCSI_NCR53C7xx is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_NCR53C8XX is not set
# CONFIG_SCSI_SYM53C8XX is not set
# CONFIG_SCSI_PAS16 is not set
# CONFIG_SCSI_PCI2000 is not set
# CONFIG_SCSI_PCI2220I is not set
# CONFIG_SCSI_PSI240I is not set
# CONFIG_SCSI_QLOGIC_FAS is not set
# CONFIG_SCSI_QLOGIC_ISP is not set
# CONFIG_SCSI_QLOGIC_FC is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_SEAGATE is not set
# CONFIG_SCSI_SIM710 is not set
# CONFIG_SCSI_SYM53C416 is not set
# CONFIG_SCSI_DC390T is not set
# CONFIG_SCSI_T128 is not set
# CONFIG_SCSI_U14_34F is not set
# CONFIG_SCSI_ULTRASTOR is not set

#
# Fusion MPT device support
#
# CONFIG_FUSION is not set
# CONFIG_FUSION_BOOT is not set
# CONFIG_FUSION_ISENSE is not set
# CONFIG_FUSION_CTL is not set
# CONFIG_FUSION_LAN is not set

#
# I2O device support
#
# CONFIG_I2O is not set
# CONFIG_I2O_PCI is not set
# CONFIG_I2O_BLOCK is not set
# CONFIG_I2O_LAN is not set
# CONFIG_I2O_SCSI is not set
# CONFIG_I2O_PROC is not set

#
# Network device support
#
CONFIG_NETDEVICES=y

#
# ARCnet devices
#
# CONFIG_ARCNET is not set
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set

#
# Ethernet (10 or 100Mbit)
#
CONFIG_NET_ETHERNET=y
# CONFIG_SUNLANCE is not set
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNBMAC is not set
# CONFIG_SUNQE is not set
# CONFIG_SUNLANCE is not set
# CONFIG_SUNGEM is not set
CONFIG_NET_VENDOR_3COM=y
# CONFIG_EL1 is not set
# CONFIG_EL2 is not set
# CONFIG_ELPLUS is not set
# CONFIG_EL16 is not set
# CONFIG_EL3 is not set
# CONFIG_3C515 is not set
# CONFIG_ELMC is not set
# CONFIG_ELMC_II is not set
CONFIG_VORTEX=m
# CONFIG_LANCE is not set
# CONFIG_NET_VENDOR_SMC is not set
# CONFIG_NET_VENDOR_RACAL is not set
# CONFIG_AT1700 is not set
# CONFIG_DEPCA is not set
# CONFIG_HP100 is not set
# CONFIG_NET_ISA is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_ADAPTEC_STARFIRE is not set
# CONFIG_AC3200 is not set
# CONFIG_APRICOT is not set
# CONFIG_CS89x0 is not set
# CONFIG_TULIP is not set
# CONFIG_DE4X5 is not set
# CONFIG_DGRS is not set
# CONFIG_DM9102 is not set
CONFIG_EEPRO100=m
# CONFIG_LNE390 is not set
# CONFIG_FEALNX is not set
# CONFIG_NATSEMI is not set
# CONFIG_NE2K_PCI is not set
# CONFIG_NE3210 is not set
# CONFIG_ES3210 is not set
# CONFIG_8139CP is not set
# CONFIG_8139TOO is not set
# CONFIG_8139TOO_PIO is not set
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SUNDANCE is not set
# CONFIG_TLAN is not set
# CONFIG_VIA_RHINE is not set
# CONFIG_VIA_RHINE_MMIO is not set
# CONFIG_WINBOND_840 is not set
# CONFIG_NET_POCKET is not set

#
# Ethernet (1000 Mbit)
#
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
# CONFIG_MYRI_SBUS is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_SK98LIN is not set
# CONFIG_FDDI is not set
# CONFIG_PLIP is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set

#
# Wireless LAN (non-hamradio)
#
# CONFIG_NET_RADIO is not set

#
# Token Ring devices
#
# CONFIG_TR is not set
# CONFIG_NET_FC is not set

#
# Wan interfaces
#
# CONFIG_WAN is not set

#
# Amateur Radio support
#
# CONFIG_HAMRADIO is not set

#
# IrDA (infrared) support
#
# CONFIG_IRDA is not set

#
# ISDN subsystem
#
# CONFIG_ISDN is not set

#
# Old CD-ROM drivers (not SCSI, not IDE)
#
# CONFIG_CD_NO_IDESCSI is not set

#
# Input core support
#
CONFIG_INPUT=m
# CONFIG_INPUT_KEYBDEV is not set
CONFIG_INPUT_MOUSEDEV=m
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
# CONFIG_SERIAL is not set
# CONFIG_SERIAL_EXTENDED is not set
# CONFIG_SERIAL_NONSTANDARD is not set
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256

#
# I2C support
#
# CONFIG_I2C is not set

#
# Mice
#
# CONFIG_BUSMOUSE is not set
# CONFIG_MOUSE is not set

#
# Joysticks
#
# CONFIG_INPUT_GAMEPORT is not set
# CONFIG_INPUT_NS558 is not set
# CONFIG_INPUT_LIGHTNING is not set
# CONFIG_INPUT_PCIGAME is not set
# CONFIG_INPUT_CS461X is not set
# CONFIG_INPUT_EMU10K1 is not set
# CONFIG_INPUT_SERIO is not set
# CONFIG_INPUT_SERPORT is not set
# CONFIG_INPUT_ANALOG is not set
# CONFIG_INPUT_A3D is not set
# CONFIG_INPUT_ADI is not set
# CONFIG_INPUT_COBRA is not set
# CONFIG_INPUT_GF2K is not set
# CONFIG_INPUT_GRIP is not set
# CONFIG_INPUT_INTERACT is not set
# CONFIG_INPUT_TMDC is not set
# CONFIG_INPUT_SIDEWINDER is not set
# CONFIG_INPUT_IFORCE_USB is not set
# CONFIG_INPUT_IFORCE_232 is not set
# CONFIG_INPUT_WARRIOR is not set
# CONFIG_INPUT_MAGELLAN is not set
# CONFIG_INPUT_SPACEORB is not set
# CONFIG_INPUT_SPACEBALL is not set
# CONFIG_INPUT_STINGER is not set
# CONFIG_INPUT_DB9 is not set
# CONFIG_INPUT_GAMECON is not set
# CONFIG_INPUT_TURBOGRAFX is not set
# CONFIG_QIC02_TAPE is not set

#
# Watchdog Cards
#
# CONFIG_WATCHDOG is not set
# CONFIG_INTEL_RNG is not set
# CONFIG_NVRAM is not set
# CONFIG_RTC is not set
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set

#
# Ftape, the floppy tape device driver
#
# CONFIG_FTAPE is not set
CONFIG_AGP=y
# CONFIG_AGP_INTEL is not set
# CONFIG_AGP_I810 is not set
CONFIG_AGP_VIA=y
# CONFIG_AGP_AMD is not set
# CONFIG_AGP_SIS is not set
# CONFIG_AGP_ALI is not set
# CONFIG_AGP_SWORKS is not set
CONFIG_DRM=y
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_GAMMA is not set
# CONFIG_DRM_R128 is not set
# CONFIG_DRM_RADEON is not set
# CONFIG_DRM_I810 is not set
CONFIG_DRM_MGA=m
# CONFIG_MWAVE is not set

#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set

#
# File systems
#
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_REISERFS_CHECK is not set
# CONFIG_REISERFS_PROC_INFO is not set
# CONFIG_ADFS_FS is not set
# CONFIG_ADFS_FS_RW is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EXT3_FS is not set
# CONFIG_JBD is not set
# CONFIG_JBD_DEBUG is not set
CONFIG_FAT_FS=m
# CONFIG_MSDOS_FS is not set
# CONFIG_UMSDOS_FS is not set
CONFIG_VFAT_FS=m
# CONFIG_EFS_FS is not set
# CONFIG_JFFS_FS is not set
# CONFIG_JFFS2_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_TMPFS is not set
# CONFIG_RAMFS is not set
CONFIG_ISO9660_FS=y
# CONFIG_JOLIET is not set
# CONFIG_ZISOFS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_NTFS_FS is not set
# CONFIG_NTFS_RW is not set
# CONFIG_HPFS_FS is not set
CONFIG_PROC_FS=y
# CONFIG_DEVFS_FS is not set
# CONFIG_DEVFS_MOUNT is not set
# CONFIG_DEVFS_DEBUG is not set
CONFIG_DEVPTS_FS=y
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX4FS_RW is not set
# CONFIG_ROMFS_FS is not set
CONFIG_EXT2_FS=y
# CONFIG_SYSV_FS is not set
# CONFIG_UDF_FS is not set
# CONFIG_UDF_RW is not set
# CONFIG_UFS_FS is not set
# CONFIG_UFS_FS_WRITE is not set

#
# Network File Systems
#
# CONFIG_CODA_FS is not set
# CONFIG_INTERMEZZO_FS is not set
# CONFIG_NFS_FS is not set
# CONFIG_NFS_V3 is not set
# CONFIG_ROOT_NFS is not set
# CONFIG_NFSD is not set
# CONFIG_NFSD_V3 is not set
# CONFIG_SUNRPC is not set
# CONFIG_LOCKD is not set
# CONFIG_SMB_FS is not set
# CONFIG_NCP_FS is not set
# CONFIG_NCPFS_PACKET_SIGNING is not set
# CONFIG_NCPFS_IOCTL_LOCKING is not set
# CONFIG_NCPFS_STRONG is not set
# CONFIG_NCPFS_NFS_NS is not set
# CONFIG_NCPFS_OS2_NS is not set
# CONFIG_NCPFS_SMALLDOS is not set
# CONFIG_NCPFS_NLS is not set
# CONFIG_NCPFS_EXTRAS is not set
# CONFIG_ZISOFS_FS is not set
# CONFIG_ZLIB_FS_INFLATE is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
# CONFIG_SMB_NLS is not set
CONFIG_NLS=y

#
# Native Language Support
#
CONFIG_NLS_DEFAULT="iso8859-1"
# CONFIG_NLS_CODEPAGE_437 is not set
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ISO8859_1 is not set
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_UTF8 is not set

#
# Console drivers
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VIDEO_SELECT is not set

#
# Sound
#
CONFIG_SOUND=y
# CONFIG_SOUND_BT878 is not set
# CONFIG_SOUND_CMPCI is not set
CONFIG_SOUND_EMU10K1=m
# CONFIG_MIDI_EMU10K1 is not set
# CONFIG_SOUND_FUSION is not set
# CONFIG_SOUND_CS4281 is not set
# CONFIG_SOUND_ES1370 is not set
# CONFIG_SOUND_ES1371 is not set
# CONFIG_SOUND_ESSSOLO1 is not set
# CONFIG_SOUND_MAESTRO is not set
# CONFIG_SOUND_MAESTRO3 is not set
# CONFIG_SOUND_ICH is not set
# CONFIG_SOUND_RME96XX is not set
# CONFIG_SOUND_SONICVIBES is not set
# CONFIG_SOUND_TRIDENT is not set
# CONFIG_SOUND_MSNDCLAS is not set
# CONFIG_SOUND_MSNDPIN is not set
# CONFIG_SOUND_VIA82CXXX is not set
# CONFIG_MIDI_VIA82CXXX is not set
# CONFIG_SOUND_OSS is not set
# CONFIG_SOUND_TVMIXER is not set

#
# USB support
#
CONFIG_USB=m
# CONFIG_USB_DEBUG is not set
# CONFIG_USB_DEVICEFS is not set
# CONFIG_USB_BANDWIDTH is not set
# CONFIG_USB_LONG_TIMEOUT is not set
CONFIG_USB_UHCI=m
# CONFIG_USB_UHCI_ALT is not set
# CONFIG_USB_OHCI is not set
# CONFIG_USB_AUDIO is not set
# CONFIG_USB_BLUETOOTH is not set
# CONFIG_USB_STORAGE is not set
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_HP8200e is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
CONFIG_USB_HID=m
# CONFIG_USB_HIDDEV is not set
# CONFIG_USB_KBD is not set
CONFIG_USB_MOUSE=m
# CONFIG_USB_WACOM is not set
# CONFIG_USB_DC2XX is not set
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_SCANNER is not set
# CONFIG_USB_MICROTEK is not set
# CONFIG_USB_HPUSBSCSI is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_CATC is not set
# CONFIG_USB_CDCETHER is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_USS720 is not set

#
# USB Serial Converter support
#
# CONFIG_USB_SERIAL is not set
# CONFIG_USB_SERIAL_GENERIC is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA28 is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA28X is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA28XA is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA28XB is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA19 is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA18X is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA19W is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA49W is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_PL2303 is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_XIRCOM is not set
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_RIO500 is not set

#
# Kernel hacking
#
# CONFIG_DEBUG_KERNEL is not set

Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Jens Axboe]

On Tue, Nov 27 2001, Marco Berizzi wrote:
> I have upgraded my PC from 768MB RAM to 1GB.
> I have recompiled the kernel (2.4.16) for hi mem support (4GB).
> 
> I have several file system on the same disk (vfat file system). I have
> compiled vfat driver both in the main kernel and as a module. When I
> load the module I issue a
> 'modprobe vfat' and I get this message (only with hi mem kernel
> support):
> 
> Warning: loading /lib/modules/2.4.16/kernel/fs/vfat/vfat.o will taint
> the kernel: no license
>  I'm using Slackware 8.0. + modutils 2.4.12
> 
> Then if I try to copy a file from that filesystem to the root filesystem
> I get this error:
> 
> Kernel panic: too few segs for DMA mappings increase AHC_NSEG
> 
> Kernel panic: too few segs for DMA mappings increase AHC_NSEG

You still haven't applied the patch I sent? Sending the same report
without this extra added infor 2 or 3 times isn't doing any good, sorry.

-- 
Jens Axboe

Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Marco Berizzi]

I have applied your patch against kernel 2.4.16
This was the message:

(Stripping trailing CRs from patch.)
patching file drivers/scsi/aic7xxx/aic7xxx_linux.c
Hunk #1 succeeded at 625 (offset 1 line).
Hunk #3 succeeded at 1714 (offset 1 line).

Then I built a kernel with hi mem support, and vfat driver built as a module.
reboot machine with new kernel.

Root login, modprobe vfat (modutils 2.4.12) and I always get this message:

Warning: loading /lib/modules/2.4.16/kernel/fs/vfat/vfat.o will taint the kernel: no license

Then I try I mount the vfat filesystem:

mount /dev/sda2 /mnt

and when I try to copy a file from the vfat FS to the linux root FS I get this kernel panic message

code: 0f 0b 80 4f 07 80 8b 03 8b 53 2c 83 ca 82 89 50 14 8b 13 8b
too few segs for dma mapping increase ahc-nseg
invalid operand: 0000
cpu: 0
eip: 0010 : [<c017f8b5>] tainted: P
eflags: 000010046
eax: ffffffff ebx: f7ea58f0 ecx: c0214000 edx: 00000000
esi: 00001000 edi: e3062800 ebp: f7ea1b40 esp: c0215e08
ds: 0018 es: 0018 ss: 0018
process swapper (pid:0, stackpage=c0215000)

<0>Kernel panic: Aiee, killing interrupt handler!
in interrupt handler_not syncing.


ebx, edi, ebp values change at every panic.

Hope this help you.

----- Original Message ----- 
From: "Jens Axboe" <axboe@suse.de>
To: "Marco Berizzi" <pupilla@hotmail.com>
Cc: <chaffee@cs.berkeley.edu>; <linux-kernel@vger.kernel.org>
Sent: Tuesday, November 27, 2001 9:11 AM
Subject: Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG


> On Tue, Nov 27 2001, Marco Berizzi wrote:
> > I have upgraded my PC from 768MB RAM to 1GB.
> > I have recompiled the kernel (2.4.16) for hi mem support (4GB).
> >
> > I have several file system on the same disk (vfat file system). I have
> > compiled vfat driver both in the main kernel and as a module. When I
> > load the module I issue a
> > 'modprobe vfat' and I get this message (only with hi mem kernel
> > support):
> >
> > Warning: loading /lib/modules/2.4.16/kernel/fs/vfat/vfat.o will taint
> > the kernel: no license
> >  I'm using Slackware 8.0. + modutils 2.4.12
> >
> > Then if I try to copy a file from that filesystem to the root filesystem
> > I get this error:
> >
> > Kernel panic: too few segs for DMA mappings increase AHC_NSEG
> >
> > Kernel panic: too few segs for DMA mappings increase AHC_NSEG
> 
> You still haven't applied the patch I sent? Sending the same report
> without this extra added infor 2 or 3 times isn't doing any good, sorry.
> 
> --
> Jens Axboe
> 
> 

Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

[Marco Berizzi]

I'm reporting only a kernel bug.
With Hi mem support enabled, I get a kernel panic trying to copy one
file from a vfat filesystem to ext2.

----- Original Message -----
From: "Albert D. Cahalan" <acahalan@cs.uml.edu>
To: "Marco Berizzi" <pupilla@hotmail.com>
Sent: Thursday, December 13, 2001 7:44 AM
Subject: Re: Kernel Panic: too few segs for DMA mapping increase
AHC_NSEG


> > I have upgraded my PC from 768MB RAM to 1GB.
>
> Not worth it.
>
> You suffer the overhead of the 4 GB option for only 33% more
> memory. If you'll go past 768 MB, go to 2 GB or 3 GB.
>