Re: Precision 490 Reboot Hang
I've had the same problem and not gotten around to reporting it. I hadn't tried reboot=bios. For me, x86_64 kernels reboot fine but i386 kernels hang at reboot, on the same machine. Mine has BIOS version A06, and behaved the same with A04 before upgrading. This started in upstream kernels between 2.6.22 and 2.6.23 IIRC, and Fedora kernels since 2.6.23 behave the same as my hand-built upstream kernels. Sometimes sysrq-b works on a boot where formal reboot hangs, though once in a while it hangs at sysrq-b too. Possibly relevant, boot messages include: ACPI: System BIOS is requesting _OSI(Linux) ACPI: If "acpi_osi=Linux" works better, Please send dmidecode to [EMAIL PROTECTED] I haven't tried any acpi*= or reboot= kernel options. Thanks, Roland ___ Fedora-kernel-list mailing list Fedora-kernel-list@redhat.com https://www.redhat.com/mailman/listinfo/fedora-kernel-list
Re: Precision 490 Reboot Hang
Thomas J. Baker wrote: > I've got a Precision 490 that hangs at reboot unless I use reboot=bios > on the kernel command line. A bug filed against the kernel should > include what other information? I might suggest looking for a BIOS update and/or downgrade before you file any bugs. I've got a Precision 490 here that reboots just peachy. Dell actually has bios updates that can be done from Linux on these boxes. -- Jarod Wilson [EMAIL PROTECTED] signature.asc Description: OpenPGP digital signature ___ Fedora-kernel-list mailing list Fedora-kernel-list@redhat.com https://www.redhat.com/mailman/listinfo/fedora-kernel-list
Re: Precision 490 Reboot Hang
On Thu, Dec 06, 2007 at 04:33:56PM -0500, Thomas J. Baker wrote: > > I've got a Precision 490 that hangs at reboot unless I use reboot=bios > on the kernel command line. A bug filed against the kernel should > include what other information? dmidecode output. Dave -- http://www.codemonkey.org.uk ___ Fedora-kernel-list mailing list Fedora-kernel-list@redhat.com https://www.redhat.com/mailman/listinfo/fedora-kernel-list
Precision 490 Reboot Hang
I've got a Precision 490 that hangs at reboot unless I use reboot=bios on the kernel command line. A bug filed against the kernel should include what other information? Thanks, tjb -- === | Thomas Baker email: [EMAIL PROTECTED]| | Systems Programmer | | Research Computing Center voice: (603) 862-4490 | | University of New Hampshire fax: (603) 862-1761 | | 332 Morse Hall | | Durham, NH 03824 USA http://wintermute.sr.unh.edu/~tjb | === ___ Fedora-kernel-list mailing list Fedora-kernel-list@redhat.com https://www.redhat.com/mailman/listinfo/fedora-kernel-list
Re: create a kernel buffer from user-level
On Thu, Dec 06, 2007 at 03:06:54PM -0600, Feng Xian wrote: > I am doing a project related to thread scheduling. This project needs > communication between kernel and user-level applications. Basically, the > user-level application sets or unset a bit in a bit vector, according to the > application's status (this part is not related to this question, so I skip > it). Then the kernel reads the bit vector everytime it schedules a thread. > My question is where to allocate the bit vector. > 1. If I allocate the bit vector in user-level, then everytime the kernel > wants to read the bit vector, I has to do a copy_from_user(). I tried this > solution, this incurs a lot of overhead and also crash the os. Since the > copy_from_user() needs to look up the virtual address which corresponds to > the starting address of bit-vector, it will cause paging in the middle of > scheduling. Is there any other way that the kernel can directly access > user-level space without doing copying and address translation? > > 2. If I allocate the bit vector directly in the kernel space. How can I do > this? Is it possible to create an extra system call that allows user-level > program to allocate a kernel buffer? > > Could anyone help me out on this? Thanks! Try the kernelnewbies list at http://kernelnewbies.org/ML or [EMAIL PROTECTED] Your problem isn't related specifically to the Fedora kernel, so is off-topic here. Dave -- http://www.codemonkey.org.uk ___ Fedora-kernel-list mailing list Fedora-kernel-list@redhat.com https://www.redhat.com/mailman/listinfo/fedora-kernel-list
create a kernel buffer from user-level
I am doing a project related to thread scheduling. This project needs communication between kernel and user-level applications. Basically, the user-level application sets or unset a bit in a bit vector, according to the application's status (this part is not related to this question, so I skip it). Then the kernel reads the bit vector everytime it schedules a thread. My question is where to allocate the bit vector. 1. If I allocate the bit vector in user-level, then everytime the kernel wants to read the bit vector, I has to do a copy_from_user(). I tried this solution, this incurs a lot of overhead and also crash the os. Since the copy_from_user() needs to look up the virtual address which corresponds to the starting address of bit-vector, it will cause paging in the middle of scheduling. Is there any other way that the kernel can directly access user-level space without doing copying and address translation? 2. If I allocate the bit vector directly in the kernel space. How can I do this? Is it possible to create an extra system call that allows user-level program to allocate a kernel buffer? Could anyone help me out on this? Thanks! -- Addr: 1025N, 23rd str, APT 33, Lincoln, NE, 68503 Phone: (402)310-9826 WWW: cse.unl.edu/~fxian ___ Fedora-kernel-list mailing list Fedora-kernel-list@redhat.com https://www.redhat.com/mailman/listinfo/fedora-kernel-list
iwl4965 issues
Hello everybody I hope this is the right place for that. My iwl4965 never been stable in my fedora 8, for sure its getting better but still i have some weird issues. Like when switching off/on the hardware the load goes really high, but my posting today is about something very unusual for me. I use my laptop in different places, but at the office i got a very unusual behavior. When i get to the office i need to turn the computer on with the hardware switch off, if not i will get a kernel panic as you can see in this link: http://www.eunomundo.com.br/gallery2/main.php?g2_itemId=25855 My machine info is at: http://smolt.fedoraproject.org/show_all?UUID=9e1cb972-a95c-4ed3-b84a-77c6f633fced Regards -- Pretto http://fedoraproject.org/wiki/MauricioPretto ___ Fedora-kernel-list mailing list Fedora-kernel-list@redhat.com https://www.redhat.com/mailman/listinfo/fedora-kernel-list
