Eric Lee / smarc-fsl-linux-kernel

09 May, 2007

1 commit

  • 6672f76a5   kdump/kexec: calculate note size at compile time ... Browse Code »

    Currently the size of the per-cpu region reserved to save crash notes is
    set by the per-architecture value MAX_NOTE_BYTES. Which in turn is
    currently set to 1024 on all supported architectures.

    While testing ia64 I recently discovered that this value is in fact too
    small. The particular setup I was using actually needs 1172 bytes. This
    lead to very tedious failure mode where the tail of one elf note would
    overwrite the head of another if they ended up being alocated sequentially
    by kmalloc, which was often the case.

    It seems to me that a far better approach is to caclculate the size that
    the area needs to be. This patch does just that.

    If a simpler stop-gap patch for ia64 to be squeezed into 2.6.21(.X) is
    needed then this should be as easy as making MAX_NOTE_BYTES larger in
    arch/asm-ia64/kexec.h. Perhaps 2048 would be a good choice. However, I
    think that the approach in this patch is a much more robust idea.

    Acked-by: Vivek Goyal
    Signed-off-by: Simon Horman
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Simon Horman
     

04 Dec, 2006

1 commit

  • a1a392f0b   [S390] Bad kexec control page allocation. ... Browse Code »

    KEXEC_CONTROL_MEMORY_LIMIT is an unsigned long value and therefore
    should be defined as one. Otherwise the kexec control page can be
    allocated above 2GB which will cause a specification exception on the
    sam31 instruction in the s390 kexec relocation code.

    Signed-off-by: Heiko Carstens
    Signed-off-by: Martin Schwidefsky

    Heiko Carstens
     

11 Jan, 2006

2 commits

  • bf2083050   [PATCH] Kdump: powerpc and s390 build failure fix ... Browse Code »

    )

    From: Vivek Goyal

    crash_setup_regs() is an architecture dependent function which is called in
    architecture independent section. So every architecture supporting kexec
    should at least provide a dummy definition of crash_setup_regs() even if
    crash dumping is not implemented yet, to avoid build failures.

    Signed-off-by: Vivek Goyal
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    akpm@osdl.org
     
  • cc5716587   [PATCH] kdump: dynamic per cpu allocation of memory for saving cpu registers ... Browse Code »

    - In case of system crash, current state of cpu registers is saved in memory
    in elf note format. So far memory for storing elf notes was being allocated
    statically for NR_CPUS.

    - This patch introduces dynamic allocation of memory for storing elf notes.
    It uses alloc_percpu() interface. This should lead to better memory usage.

    - Introduced based on Andi Kleen's and Eric W. Biederman's suggestions.

    - This patch also moves memory allocation for elf notes from architecture
    dependent portion to architecture independent portion. Now crash_notes is
    architecture independent. The whole idea is that size of memory to be
    allocated per cpu (MAX_NOTE_BYTES) can be architecture dependent and
    allocation of this memory can be architecture independent.

    Signed-off-by: Vivek Goyal
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Vivek Goyal
     

26 Jun, 2005

1 commit

  • cf13f0eaf   [PATCH] kexec: s390 support ... Browse Code »

    Add kexec support for s390 architecture.

    From: Milton Miller

    - Fix passing of first argument to relocate_kernel assembly.
    - Fix Kconfig description.
    - Remove wrong comment and comments that describe obvious things.
    - Allow only KEXEC_TYPE_DEFAULT as image type -> dump not supported.

    Acked-by: Martin Schwidefsky
    Signed-off-by: Heiko Carstens
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Heiko Carstens