Eric Lee / smarc-fsl-linux-kernel

14 Jan, 2011

2 commits

16 Dec, 2009

2 commits

  • afcf938ee   HWPOISON: Add a madvise() injector for soft page offlining ... Browse Code »

    Process based injection is much easier to handle for test programs,
    who can first bring a page into a specific state and then test.
    So add a new MADV_SOFT_OFFLINE to soft offline a page, similar
    to the existing hard offline injector.

    Signed-off-by: Andi Kleen

    Andi Kleen
     
  • ea6376395   nommu: fix malloc performance by adding uninitialized flag ... Browse Code »

    The NOMMU code currently clears all anonymous mmapped memory. While this
    is what we want in the default case, all memory allocation from userspace
    under NOMMU has to go through this interface, including malloc() which is
    allowed to return uninitialized memory. This can easily be a significant
    performance penalty. So for constrained embedded systems were security is
    irrelevant, allow people to avoid clearing memory unnecessarily.

    This also alters the ELF-FDPIC binfmt such that it obtains uninitialised
    memory for the brk and stack region.

    Signed-off-by: Jie Zhang
    Signed-off-by: Robin Getz
    Signed-off-by: Mike Frysinger
    Signed-off-by: David Howells
    Acked-by: Paul Mundt
    Acked-by: Greg Ungerer
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jie Zhang
     

24 Sep, 2009

1 commit

  • db1682636   Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6 ... Browse Code »

    * 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (21 commits)
    HWPOISON: Enable error_remove_page on btrfs
    HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs
    HWPOISON: Add madvise() based injector for hardware poisoned pages v4
    HWPOISON: Enable error_remove_page for NFS
    HWPOISON: Enable .remove_error_page for migration aware file systems
    HWPOISON: The high level memory error handler in the VM v7
    HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per process
    HWPOISON: shmem: call set_page_dirty() with locked page
    HWPOISON: Define a new error_remove_page address space op for async truncation
    HWPOISON: Add invalidate_inode_page
    HWPOISON: Refactor truncate to allow direct truncating of page v2
    HWPOISON: check and isolate corrupted free pages v2
    HWPOISON: Handle hardware poisoned pages in try_to_unmap
    HWPOISON: Use bitmask/action code for try_to_unmap behaviour
    HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2
    HWPOISON: Add poison check to page fault handling
    HWPOISON: Add basic support for poisoned pages in fault handler v3
    HWPOISON: Add new SIGBUS error codes for hardware poison signals
    HWPOISON: Add support for poison swap entries v2
    HWPOISON: Export some rmap vma locking to outside world
    ...

    Linus Torvalds
     

22 Sep, 2009

1 commit

  • d19f35248   ksm: define MADV_MERGEABLE and MADV_UNMERGEABLE ... Browse Code »

    The out-of-tree KSM used ioctls on fds cloned from /dev/ksm to register a
    memory area for merging: we prefer now to use an madvise(2) interface.

    This patch just defines MADV_MERGEABLE (to tell KSM it may merge pages in
    this area found identical to pages in other mergeable areas) and
    MADV_UNMERGEABLE (to undo that).

    Most architectures use asm-generic, but alpha, mips, parisc, xtensa need
    their own definitions: included here for mmotm convenience, but we'll
    probably want to split this and feed pieces to arch maintainers.

    Based upon earlier patches by Chris Wright and Izik Eidus.

    Signed-off-by: Hugh Dickins
    Signed-off-by: Chris Wright
    Signed-off-by: Izik Eidus
    Cc: Michael Kerrisk
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Ralf Baechle
    Cc: Kyle McMartin
    Cc: Helge Deller
    Cc: Chris Zankel
    Cc: Andrea Arcangeli
    Cc: Rik van Riel
    Cc: Wu Fengguang
    Cc: Balbir Singh
    Cc: Hugh Dickins
    Cc: KAMEZAWA Hiroyuki
    Cc: Lee Schermerhorn
    Cc: Avi Kivity
    Cc: Nick Piggin
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Hugh Dickins
     

16 Sep, 2009

1 commit

  • 9893e49d6   HWPOISON: Add madvise() based injector for hardware poisoned pages v4 ... Browse Code »

    Impact: optional, useful for debugging

    Add a new madvice sub command to inject poison for some
    pages in a process' address space. This is useful for
    testing the poison page handling.

    This patch can allow root to tie up large amounts of memory.
    I got feedback from container developers and they didn't see any
    problem.

    v2: Use write flag for get_user_pages to make sure to always get
    a fresh page
    v3: Don't request write mapping (Fengguang Wu)
    v4: Move MADV_* number to avoid conflict with KSM (Hugh Dickins)

    Signed-off-by: Andi Kleen

    Andi Kleen
     

12 Jun, 2009

1 commit

  • 63b852a6b   asm-generic: rename termios.h, signal.h and mman.h ... Browse Code »

    The existing asm-generic versions are incomplete and included
    by some architectures. New architectures should be able
    to use a generic version, so rename the existing files and
    change all users, which lets us add the new files.

    Signed-off-by: Remis Lima Baima
    Signed-off-by: Arnd Bergmann

    Arnd Bergmann