floating point problem

In Linux PPC, the MSR[FP] bit (that is floating point available bit) is off (atleast for non-SMP). Due to this, whenever some floating point instruction is executed in 'user mode', it leads to a exception 'FPUnavailable'. The exception handler for this exception apart from setting the MSR[FP]

floating point problem

In Linux PPC, the MSR[FP] bit (that is floating point available bit) is off (atleast for non-SMP). Due to this, whenever some floating point instruction is executed in 'user mode', it leads to a exception 'FPUnavailable'. The exception handler for this exception apart from setting the MSR[FP]

virt_to_bus and virt_to_phys on Apple G4 target

I am running linux 2.4.2 on Apple G4 machine. I think the 'PCI bus addresses' and 'physical addresses' are same on this architecture. I expected the two be different but according to asm/io.h 'virt_to_bus(addr) = virt_to_phys(addr) + PCI_DRAM_OFFSET'. I printed the value of 'PCI_DRAM_OFFSET' and

Re: mmap

I use the 'map_user_kiobuf' and 'lock_kiovec' kernel routines in a module for 'user space memory'. After that if I pass the '(iobuf->maplist[0])-mem_map) << PAGE_SHIFT)' to the hardware for DMA operations and it works fine for Intel platforms. Now how can I use the 'iobuf' struct obtained after

Re: mmap

I use the 'map_user_kiobuf' and 'lock_kiovec' kernel routines in a module for 'user space memory'. After that if I pass the '(iobuf-maplist[0])-mem_map) PAGE_SHIFT)' to the hardware for DMA operations and it works fine for Intel platforms. Now how can I use the 'iobuf' struct obtained after

virt_to_bus and virt_to_phys on Apple G4 target

I am running linux 2.4.2 on Apple G4 machine. I think the 'PCI bus addresses' and 'physical addresses' are same on this architecture. I expected the two be different but according to asm/io.h 'virt_to_bus(addr) = virt_to_phys(addr) + PCI_DRAM_OFFSET'. I printed the value of 'PCI_DRAM_OFFSET' and

interrupt problem....

I am experiencing a strange problem. I am doing a continuous DMA for long hours using a card on my system. In my code I enable interrupts and clear the interrupts in the interrupt handler which is called on completion of every DMA cycle. Now, the program works fine for say 16-20 hours but I think

interrupt problem....

I am experiencing a strange problem. I am doing a continuous DMA for long hours using a card on my system. In my code I enable interrupts and clear the interrupts in the interrupt handler which is called on completion of every DMA cycle. Now, the program works fine for say 16-20 hours but I think

harddisk support

Hi, I do not know whether I should ask this question on this mailing list, but it definitely has to do either with the kernel confiuration or kernel support. In the '/dev' tree, the device file entries for SCSI harddisks ranges from '/dev/sda' to '/dev/sdp'. If I attach 17 scsi harddisks to a

harddisk support

Hi, I do not know whether I should ask this question on this mailing list, but it definitely has to do either with the kernel confiuration or kernel support. In the '/dev' tree, the device file entries for SCSI harddisks ranges from '/dev/sda' to '/dev/sdp'. If I attach 17 scsi harddisks to a

Re: pte_page

I am doing a DMA from a card to system memory. The system memory "physical address" is '0x104000'. I am doing this on x86 with kernel version 2.4.2. Can this address be the address of a user space buffer? Regards, Daljeet. |+---> || Ingo Molnar | |

Re: pte_page

I am doing a DMA from a card to system memory. The system memory physical address is '0x104000'. I am doing this on x86 with kernel version 2.4.2. Can this address be the address of a user space buffer? Regards, Daljeet. |+--- || Ingo Molnar | |

pte_page

I use the 'pgt_offset', 'pmd_offset', 'pte_offset' and 'pte_page' inside a module to get the physical address of a user space virtual address. The physical address returned by 'pte_page' is not page aligned whereas the virtual address was page aligned. Can somebody tell me the reason? Also, can

pte_page

I use the 'pgt_offset', 'pmd_offset', 'pte_offset' and 'pte_page' inside a module to get the physical address of a user space virtual address. The physical address returned by 'pte_page' is not page aligned whereas the virtual address was page aligned. Can somebody tell me the reason? Also, can

query regarding 'map_user_kiobuf'

I am using linux kernel version 2.4.2 on Intel PC. I have been trying my luck for over a week regarding usage of 'map_user_kiobuf' for doing a DMA into a memory area that belongs to user space. Actually my requirement is that I want to do DMA into a user space memory area. What I have done

query regarding 'map_user_kiobuf'

I am using linux kernel version 2.4.2 on Intel PC. I have been trying my luck for over a week regarding usage of 'map_user_kiobuf' for doing a DMA into a memory area that belongs to user space. Actually my requirement is that I want to do DMA into a user space memory area. What I have done

bindprocessor

How can I bind a user space process to a particular processor in a SMP environment? thanks, Daljeet Maini - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html

bindprocessor

How can I bind a user space process to a particular processor in a SMP environment? thanks, Daljeet Maini - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html

CONFIG_APUS

When is the 'CONFIG_APUS' flag used ? Daljeet Maini IBM Global Services Ltd. - Bangalore Ph. No. - 5267117 Extn 2954 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at

CONFIG_APUS

When is the 'CONFIG_APUS' flag used ? Daljeet Maini IBM Global Services Ltd. - Bangalore Ph. No. - 5267117 Extn 2954 - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at

Re: mmap

When I malloc the memory in user space, the memory may be discontinuous for large chunks of memory say 16k or 32k. Does the 'kiobuf' interface take care of this or it assumes it to be continuous? regards, Daljeet Maini IBM Global Services Ltd. - Bangalore Ph. No. - 5267117 Extn 2954

mmap

I am doing the following: malloc some memory is user space pass its pointer to some kernel module in the kernel module...do a pci_alloc_consistent so that i get a memory region for PCI DMA operations now the problem is that i want to remap the address range pointed by the user space

mmap

I am doing the following: malloc some memory is user space pass its pointer to some kernel module in the kernel module...do a pci_alloc_consistent so that i get a memory region for PCI DMA operations now the problem is that i want to remap the address range pointed by the user space

Re: mmap

When I malloc the memory in user space, the memory may be discontinuous for large chunks of memory say 16k or 32k. Does the 'kiobuf' interface take care of this or it assumes it to be continuous? regards, Daljeet Maini IBM Global Services Ltd. - Bangalore Ph. No. - 5267117 Extn 2954

dma error

Hi, Was there any change in the PCI initialization code between versions 2.4.0-test8 and 2.4.2.? I am working on a card and for the same register settings of the card, DMA from host memory to card memory is successfull for the 2.4.0-test8 but on 2.4.2 kernel, the data transfer is successfull

dma error

Hi, Was there any change in the PCI initialization code between versions 2.4.0-test8 and 2.4.2.? I am working on a card and for the same register settings of the card, DMA from host memory to card memory is successfull for the 2.4.0-test8 but on 2.4.2 kernel, the data transfer is successfull

2.4.0-test8 compilation problem on netfinity

Hi, If I compile the 2.4.0-test8 kernel on uniprocessor intel machine with SMP support, I get no compilation problems. But when I compile on a 'netfinity' machine with 3 intel processors with SMP support, the telnet session in which I do this gets hung during 'make bzImage'. Though the 'bzImage'

2.4.0-test8 compilation problem on netfinity

Hi, If I compile the 2.4.0-test8 kernel on uniprocessor intel machine with SMP support, I get no compilation problems. But when I compile on a 'netfinity' machine with 3 intel processors with SMP support, the telnet session in which I do this gets hung during 'make bzImage'. Though the 'bzImage'

system call handling

Hi, By looking into the structure of GDT as used by linux kernel(file include/asm/desc.c, kernel ver 2.4), it appears as if linux kernel does not use the "call gate descriptors" for system call handling. Is this correct? If it is correct then how does the system calls are handled by the kernel

freeing memory

hi, i am allocating some 1000 bytes of memory as folows f_malloc() { . for (i=1 to 10) { size = 1000; pAddr[i] = (unsigned long) kmalloc(size, GFP_DMA | GFP_BUFFER); } ... } and freeing the allocated memory as follows f_free() { . for (i=1

freeing memory

hi, i am allocating some 1000 bytes of memory as folows f_malloc() { . for (i=1 to 10) { size = 1000; pAddr[i] = (unsigned long) kmalloc(size, GFP_DMA | GFP_BUFFER); } ... } and freeing the allocated memory as follows f_free() { . for (i=1

MAP_NR

can anyone tell the subsitute for MAP_NR in version 2.4? or is MAP_NR still there? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/

MAP_NR

can anyone tell the subsitute for MAP_NR in version 2.4? or is MAP_NR still there? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/

effect of pci_unregister_driver

Hi, If I have two identical network cards on my machine and I unregister the driver of one of them (say eth0) using the call "pci_unregister_driver(pdev->driver)" where pdev is the 'pci_dev' structure for eth0, does the device 'eth1' i.e. the other one gets effected by this. Regards, daljeet.

mapping user space buffer to kernel address space

Hi, I have a user buffer and i want to map it to kernel address space can anyone tell how to do this like in AIX we have xmattach thanks daljeet - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at

mapping user space buffer to kernel address space

Hi, I have a user buffer and i want to map it to kernel address space can anyone tell how to do this like in AIX we have xmattach thanks daljeet - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at

Re: File System issue

>I find out that doing the following command: >cp toto titi/toto >where toto is a file and titi is a directory do >not change the date stamp of >`titi'. i checked this out with 2.4-0test9. timestmap of directory is getting modified. you must be using very old kernel - To unsubscribe from

executing a user space function in kernel module

Hi, struct t{ int (*x)(int); }fstruct; main() { . . fstruct.x = f; ./*write fstruct to a device file*/ . } int f(int i) { printf("got %d\n",i); return i; } i pass this structure to kernel module by writting to device file. the write function of module is like .. .. char *kbuf;

executing a user space function in kernel module

Hi, struct t{ int (*x)(int); }fstruct; main() { . . fstruct.x = f; ./*write fstruct to a device file*/ . } int f(int i) { printf("got %d\n",i); return i; } i pass this structure to kernel module by writting to device file. the write function of module is like .. .. char *kbuf;

Re: File System issue

I find out that doing the following command: cp toto titi/toto where toto is a file and titi is a directory do not change the date stamp of `titi'. i checked this out with 2.4-0test9. timestmap of directory is getting modified. you must be using very old kernel - To unsubscribe from this