RE: question about scsi generic behavior

Well, Hardcoding of block size to 512 bytes for disk devices is what currently either the block device driver or the sd driver is doing. Because, if I run dd to the same device using the corresponding block device (sde) it runs fine. So, I feel that either the sg driver or the block device dri

question about scsi generic behavior

Hi List, I am trying to use sg_dd which goes through the scsi generic driver. This is how use it. sg_dd if=/dev/zero of=/dev/sg5 bs=4096 count=1 And sg5 is actually a disk. The question that I have is, does the scsi generic driver have a knowledge about what kind of device it is dealing with

RE: [PATCH] Procfs Guide

So where can find the whole docbook ? I could not find under linux/Documentation directory. Regards, -hiren (408)970-3062 [EMAIL PROTECTED] > -Original Message- > From: Erik Mouw [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, May 30, 2001 1:36 PM > To: Tim Waugh > Cc: Linux kernel mailin

why DMAable memory restriction ?

Hi LIst, In the linux kernel there is a limitation on the amount of contiguous DMAable memory that can be allocated (I guess about 128K). Does anobody know what is the reason for such a restriction ? Is there any plan to remove this restriction in the future releases of kernel ? Regards, -hiren

Re: Processes hanging in D state in 2.4.3 - any findings?

Hi List, I saw this in the archive. And I guess, I am also seeing this problem on 2.4.4. But I am not sure. Has this problem of rw_semaphore been fixed in 2.4.4 ? If not any idea, when will this be fixed ? Regards, -hiren (408)970-3062 [EMAIL PROTECTED] - To unsubscribe from this list: send the

killing a process writing to a scsi drive freezes a system

Hi List, I tried to do dd to a bunch of scsi drives running in background. e.g. dd if=/dev/zero of=/dev/sdb bs=1024 & dd if=/dev/zero of=/dev/sdc bs=1024 & dd if=/dev/zero of=/dev/sdd bs=1024 & Then I tried to kill the first dd process writing to /dev/sdb and it freezes up the system.

RE: vmalloc on 2.4.x on ia64

dropping the io_request_lock around vmalloc worked great. Thanks for all the help. I really appreciate it. Thanks -hiren > -Original Message- > From: Alan Cox [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, April 04, 2001 5:29 PM > To: [EMAIL PROTECTED] > Cc: [EMAIL PROTECTED]; [EMAIL PRO

RE: vmalloc on 2.4.x on ia64

I am calling during initialization only from detect() entry point. But I guess, before the detect() is called, scsi layer acquires the io_request_lock. So, you mean to say that I need to release it before calling vmalloc() ? I was doing the same thing on 2.2.x and even on 2.4.0 and it was working

RE: vmalloc on 2.4.x on ia64

Can we call vmalloc() or get_free_pages() from scsi low-level driver (HBA driver) ? The reason why I am asking is because, I am calling vmalloc from scsi low-level driver and I tried this on 2.4.2 on ia32 as well as ia64 and on both the systems, it is hanging. on ia64 it happens everytime whereas

RE: vmalloc on 2.4.x on ia64

That is what I said. I am using vmalloc only. But the call to vmalloc is hanging. -hiren > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Monday, April 02, 2001 6:26 PM > To: [EMAIL PROTECTED] > Subject: RE: vmalloc on 2.4.x on ia64 > > > kmalloc() has

downloading drive firmware to a fibre channel drive through linux

Hi, Is it possible to download a drive firmware to a fibre channel drive (or even a scsi drive) through linux ? I know that on NT (or 98) they use WNASPI and a utility provided by the drive manufacturer to download the firmware. I was wondering if this is possible through linux scsi interface. F

can somebody explain barrier() macro ?

Hi, barrier() is defined in kernel.h as follows : #define barrier() __asm__ __volatile__("": : :"memory") what does this mean ? is this like "nop" ? TIA, -hiren - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordo

cli and timer/other interrupts

Hi on UP system, if we call cli(), then after that what all interrupts can occur ? Does the timer interrupt also get blocked when we call cli() ? I read that, cli() disables all non-maskable interrupts. Thanks -hiren - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in t

problem with devfsd compilation

Hi, I am trying to compile devfsd on my system running RedHat linux 7.0 (kernel 2.2.16-22). I get the error "RTLD_NEXT" undefined. I am not sure where this symbol is defined. Is there anything that I am missing on my system. Also, I applied the devfs patch to the kernel, installed the new kern

RE: stripping symbols from modules

That is what I was guessing. But insmod does not need all symbols present in the .o. I need to do this because when I release the driver to the customer, I don't want them to be aware of some of the symbols. I understand that this is against the open source policy. But that's how it is and it is

RE: 2.4.0 release and ia64

It looks like, those patches are for the test kernels. I could not find one that can be used for the final released 2.4.0 kernel. I am not sure which one should I use. So far I was using test10 kernel and then corresponding ia64 patch for test10 on my ia64 system. Is it that I can apply any pat

2.4.0 release and ia64

Hi All, Now that 2.4.0 kernel is officially released, does it run or ia64 as it is or do we need to apply any patches to make it run on ia64 ? Thanks and regards, -hiren - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please

driver disk

Hi All, Can somebody tell me how to create a driver disk for redhat linux or send me a URL where I can find the information on this ? On redhat linux I started installation using "export mode" so that I can use my own driver to install the linux on the hard disks connected to my SCSI adapter and

RE: accessing on-card ram/rom

I looked at the IO-mapping.txt file. It says that on x86 architecture it should not make any difference. It also says that "on x86 it _is_ the same memory space. So on x86 it actually works to just dereference a pointer". Any inputs on this ? Thanks and regards, -hiren > -Original Message--

kernel build and symbol version problem with RedHat Linux 7

Hi All, I built the kernel on RedHat Linux 7 after configuring the build (make menuconfig) for SMP kernel. After installing the kernel (copy bzImage to /boot directory and run lilo) I rebooted the system to run the new kernel. Then I looked at the /proc/ksyms file to see if the symbol names are p

proccess hung

Hi All, I have one process hung on my linux smp system (2 processors) running RedHat Linux 7. The command % ps -eo fname,tty,pid,stat,pcpu,nwchan,wchan gives the following information about the command : COMMAND TT PID STAT %CPU WCHAN WCHAN rm tty2 21760R99.8

problem with Compiling kernel sources.

Hi All, Just 2 days back I bought RedHat Linux7. And I was trying to build the kernel (make bzImage). But the build failed. It looks like the compiler issue. But I am not sure and hence, I have posted this on this list. Well, I tried one more thing. The RedHat Linux7 came with gcc package gcc-2

processes hung

Hi All, I am testing my scsi driver. I started the test, and down the line, the I/O processes (cp/rm) are hung. It looks like they are hung on completion of some I/O. How do I find out, for which I/O they are waiting ? Is there any way to look at the kernel data structures ? Thanks and regards,

info about ext2 file system structure

Hi All, Where can I find complete in-depth information about the structure of the linux ext2 file system ? Please copy your replies to [EMAIL PROTECTED] as I am not on the linux-kernel list. Regards, -hiren - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of