similar to: lustre osd implementation

lustre-1.8 has OSD structures in place, what do I need to add in to make it work with OSD T10 standard? could anybody point me to some docs mentioning lustre internals - OSTs, OSSs, OBDs, and control flow when a read/write call is invoked by a client. thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi, A bit of explanation of what I''m trying to achieve : We have a bunch of homogeneous nodes that have CPU + RAM + Storage and we want to use that as some generic cluster. The idea is to have Xen on all of these and run Ceph OSD in a domU on each to "export" the local storage space to the entire cluster. And then use RBD to store / access VM images from any of the machines.

Hi, I''ve a quad-core x86_64 machine (Intel Xeon), with sse/mmx support. However, I want to disable sse/mmx support from HVM guests. How can I do this? Also, is it reasonable to expect illegal instruction fault in non-root VMX mode if a guest VM runs an application with sse/mmx instructions? Thanks, Ashish _______________________________________________ Xen-devel mailing list

I am trying to compile lustre like this : [onkar at localhost build-lustre]$ ./configure --with-kernel-source-header=/home/onkar/LUSTRE/linux-2.6.33.3/include --with-linux=/home/onkar/LUSTRE/linux-2.6.33.3 --with-linux-obj=/home/onkar/LUSTRE/linux-2.6.33.3 --with-linux-config=/home/onkar/LUSTRE/linux-2.6.33.3 checking build system type... i686-pc-linux-gnu checking host system type...

I am trying to compile lustre like this : [onkar at localhost build-lustre]$ ./configure --with-kernel-source-header=/home/onkar/LUSTRE/linux-2.6.33.3/include --with-linux=/home/onkar/LUSTRE/linux-2.6.33.3 --with-linux-obj=/home/onkar/LUSTRE/linux-2.6.33.3 --with-linux-config=/home/onkar/LUSTRE/linux-2.6.33.3 checking build system type... i686-pc-linux-gnu checking host system type...

does that mean .o generated with gcc (.c -> .s and .s -> .o) will not contain llvm ir? i meant, final kernel bitcode ir arch independent and can be JIT with any arch-specific backend. Is it not the case? thanks, ashish On Sat, Sep 27, 2008 at 10:43 PM, Andrew Lenharth <andrewl at lenharth.org> wrote: > On Sat, Sep 27, 2008 at 8:08 PM, Ashish Bijlani > <ashish.bijlani at

Hi all, I am a grad student at Carnegie Mellon University. I had my course work in advanced storage systems in previous semester, and I am interested to work on Lustre. I prefer to take up a project that could be completed in a duration of a month or two. Since I am a novice w.r.t. my familiarity with Lustre code base, I seek your opinion to choose a project from the list:

Hi, I'm trying to compile linux-2.6.23.16 with llvm-2.3. Is it at all possible? I get "Not an ELF" error. I pass "-emit-llvm" option to spit LLVM IR, which can be JITed at runtime $ make CROSS_COMPILE=llvm- CFLAGS="-O2 -emit-llvm" Error: not ELF make[2]: *** [scripts/mod/elfconfig.h] Error 1 make[1]: *** [scripts/mod] Error 2 make: *** [scripts] Error 2 using

No, this is not the case. Just because you compile something to LLVM IR does not make the thing you compiled work on every architecture. You may even be able to retarget it to any architecture (it depends), but this in no way means the result will *actually work*. The LLVM IR generated by llvm-gcc is very architecture dependent. Theoretically you could make a C compiler that was mostly C

Thanks for the help. I've a couple of questions though: How does LLVM deal with inline assembly? I'm trying to compile kernel and I get this error probably because LLVM is not able to handle inline assembly. I'm using LLVM-2.3 code snippet from "arch/x86_64/kernel/asm-offsets.c" .... #define DEFINE(sym, val) \ asm volatile("\n->" #sym " %0 "

Hi, I'm trying to compile UML with LLVM. However, LLVM-LD hangs whiile linking modules. It's consuming 99% of the CPU llvm-ld -v -r -o kernel/built-in.o kernel/sched.o kernel/fork.o kernel/exec_domain.o kernel/panic.o kernel/printk.o kernel/profile.o kernel/exit.o kernel/itimer.o kernel/time.o kernel/softirq.o kernel/resource.o kernel/sysctl.o kernel/capability.o kernel/ptrace.o

Thanks. I actually checked the IR code generated, it seems inline assembly is being handled correctly. The preprocessing is also being done correctly. Here is the asm-offsets.i file snippet.. ... builtin_offsetof(struct crypto_tfm,__crt_ctx))); asm volatile("\n->" : : ); asm volatile("\n->" "__NR_syscall_max" " %0 " "sizeof(syscalls) - 1"

On Sat, Sep 27, 2008 at 8:08 PM, Ashish Bijlani <ashish.bijlani at gmail.com> wrote: > If I use GCC to generate asm-offsets.s file, then the build system go > ahead but fails when it generates .so files as Andrew pointed out. You have to generate this with gcc. .c -> .s and .s -> .o need gcc, .c -> .o can use llvm-gcc. The combination has to be fixed up in final linking.

On Fri, Sep 26, 2008 at 9:19 PM, Ashish Bijlani <ashish.bijlani at gmail.com> wrote: > Hi, > > I'm trying to compile linux-2.6.23.16 with llvm-2.3. Is it at all > possible? Yes, but it requires significant hacking, and the result for 2.6 is a mostly bitcode kernel with a few userspace shared libraries linked in as objcode (yes, the kernel builds .so files and includes them

I plan to use virtualization infrastructure to JIT VM Kernel Code. Michael Engel has done that in the past to have dynamic aspect in the Kernel: http://llvm.org/pubs/2005-03-14-ACP4IS-AspectsKernel.pdf He used L4 based Hypervisor and Virtual Machines. Can this not be done or am I missing something? -Ashish On Sat, Sep 27, 2008 at 3:13 AM, Török Edwin <edwintorok at gmail.com> wrote: >

On Sep 27, 2008, at 4:34 PM, Ashish Bijlani wrote: > Thanks for the help. I've a couple of questions though: > > How does LLVM deal with inline assembly? It's been implemented piece by piece on an as-needed basis. At this point most of the things people actually use should work. llvm-gcc has seen the Linux kernel, so most usages in there ought to work. The symptoms here

Hi, I'm trying to compile linux kernel with llvm to generate llvm ir (bitcode). It seems like llvm-ld doesn't accept any linker scripts. How do I deal with vmlinux.lds in such a case? How did people who have compiled linux kernel with llvm deal with this in the past? Thanks, Ashish

Hi, I''m trying to run guest pv vm on my machine running xen-unstable (xen-4.0.0-rc3.pre + linux-2.6-pvops). However, I get blktap error: " sudo xm create -c xmexample Using config file "./xmexample". Error: Failed to create device. stdout: unrecognized child response stderr: Check that target "/home/ashish/xen/hd.img" exists and that blktap2 driver

On 2008-09-27 05:19, Ashish Bijlani wrote: > Hi, > > I'm trying to compile linux-2.6.23.16 with llvm-2.3. Is it at all > possible? I get "Not an ELF" error. I pass "-emit-llvm" option to spit > LLVM IR, which can be JITed at runtime > > If you want to build a kernel you can't use the JIT anyway, so why not just build native code? Best regards,

On 2008-09-27 18:29, Ashish Bijlani wrote: > I plan to use virtualization infrastructure to JIT VM Kernel Code. > Michael Engel has done that in the past to have dynamic aspect in the > Kernel: http://llvm.org/pubs/2005-03-14-ACP4IS-AspectsKernel.pdf > > He used L4 based Hypervisor and Virtual Machines. Can this not be done > or am I missing something? > I think you'll