1. 12 Nov, 2013 6 commits
  2. 11 Sep, 2013 3 commits
  3. 09 Jul, 2013 9 commits
  4. 03 Jul, 2013 6 commits
  5. 07 May, 2013 1 commit
  6. 29 Apr, 2013 8 commits
    • Atsushi Kumagai's avatar
      kexec, vmalloc: export additional vmalloc layer information · 13ba3fcb
      Atsushi Kumagai authored
      Now, vmap_area_list is exported as VMCOREINFO for makedumpfile to get
      the start address of vmalloc region (vmalloc_start).  The address which
      contains vmalloc_start value is represented as below:
      
        vmap_area_list.next - OFFSET(vmap_area.list) + OFFSET(vmap_area.va_start)
      
      However, both OFFSET(vmap_area.va_start) and OFFSET(vmap_area.list)
      aren't exported as VMCOREINFO.
      
      So this patch exports them externally with small cleanup.
      
      [akpm@linux-foundation.org: vmalloc.h should include list.h for list_head]
      Signed-off-by: default avatarAtsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Joonsoo Kim <js1304@gmail.com>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Dave Anderson <anderson@redhat.com>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      13ba3fcb
    • Joonsoo Kim's avatar
      mm, vmalloc: remove list management of vmlist after initializing vmalloc · 4341fa45
      Joonsoo Kim authored
      Now, there is no need to maintain vmlist after initializing vmalloc.  So
      remove related code and data structure.
      Signed-off-by: default avatarJoonsoo Kim <js1304@gmail.com>
      Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Dave Anderson <anderson@redhat.com>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      4341fa45
    • Joonsoo Kim's avatar
      mm, vmalloc: export vmap_area_list, instead of vmlist · f1c4069e
      Joonsoo Kim authored
      Although our intention is to unexport internal structure entirely, but
      there is one exception for kexec.  kexec dumps address of vmlist and
      makedumpfile uses this information.
      
      We are about to remove vmlist, then another way to retrieve information
      of vmalloc layer is needed for makedumpfile.  For this purpose, we
      export vmap_area_list, instead of vmlist.
      Signed-off-by: default avatarJoonsoo Kim <js1304@gmail.com>
      Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: Dave Anderson <anderson@redhat.com>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f1c4069e
    • Joonsoo Kim's avatar
      mm, vmalloc: iterate vmap_area_list, instead of vmlist, in vmallocinfo() · d4033afd
      Joonsoo Kim authored
      This patch is a preparatory step for removing vmlist entirely.  For
      above purpose, we change iterating a vmap_list codes to iterating a
      vmap_area_list.  It is somewhat trivial change, but just one thing
      should be noticed.
      
      Using vmap_area_list in vmallocinfo() introduce ordering problem in SMP
      system.  In s_show(), we retrieve some values from vm_struct.
      vm_struct's values is not fully setup when va->vm is assigned.  Full
      setup is notified by removing VM_UNLIST flag without holding a lock.
      When we see that VM_UNLIST is removed, it is not ensured that vm_struct
      has proper values in view of other CPUs.  So we need smp_[rw]mb for
      ensuring that proper values is assigned when we see that VM_UNLIST is
      removed.
      
      Therefore, this patch not only change a iteration list, but also add a
      appropriate smp_[rw]mb to right places.
      Signed-off-by: default avatarJoonsoo Kim <js1304@gmail.com>
      Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Dave Anderson <anderson@redhat.com>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d4033afd
    • Joonsoo Kim's avatar
      mm, vmalloc: iterate vmap_area_list in get_vmalloc_info() · f98782dd
      Joonsoo Kim authored
      This patch is a preparatory step for removing vmlist entirely.  For
      above purpose, we change iterating a vmap_list codes to iterating a
      vmap_area_list.  It is somewhat trivial change, but just one thing
      should be noticed.
      
      vmlist is lack of information about some areas in vmalloc address space.
      For example, vm_map_ram() allocate area in vmalloc address space, but it
      doesn't make a link with vmlist.  To provide full information about
      vmalloc address space is better idea, so we don't use va->vm and use
      vmap_area directly.  This makes get_vmalloc_info() more precise.
      Signed-off-by: default avatarJoonsoo Kim <js1304@gmail.com>
      Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Dave Anderson <anderson@redhat.com>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f98782dd
    • Joonsoo Kim's avatar
      mm, vmalloc: iterate vmap_area_list, instead of vmlist in vread/vwrite() · e81ce85f
      Joonsoo Kim authored
      Now, when we hold a vmap_area_lock, va->vm can't be discarded.  So we can
      safely access to va->vm when iterating a vmap_area_list with holding a
      vmap_area_lock.  With this property, change iterating vmlist codes in
      vread/vwrite() to iterating vmap_area_list.
      
      There is a little difference relate to lock, because vmlist_lock is mutex,
      but, vmap_area_lock is spin_lock.  It may introduce a spinning overhead
      during vread/vwrite() is executing.  But, these are debug-oriented
      functions, so this overhead is not real problem for common case.
      Signed-off-by: default avatarJoonsoo Kim <js1304@gmail.com>
      Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Dave Anderson <anderson@redhat.com>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e81ce85f
    • Joonsoo Kim's avatar
      mm, vmalloc: protect va->vm by vmap_area_lock · c69480ad
      Joonsoo Kim authored
      Inserting and removing an entry to vmlist is linear time complexity, so
      it is inefficient.  Following patches will try to remove vmlist
      entirely.  This patch is preparing step for it.
      
      For removing vmlist, iterating vmlist codes should be changed to
      iterating a vmap_area_list.  Before implementing that, we should make
      sure that when we iterate a vmap_area_list, accessing to va->vm doesn't
      cause a race condition.  This patch ensure that when iterating a
      vmap_area_list, there is no race condition for accessing to vm_struct.
      Signed-off-by: default avatarJoonsoo Kim <js1304@gmail.com>
      Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Dave Anderson <anderson@redhat.com>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c69480ad
    • Joonsoo Kim's avatar
      mm, vmalloc: move get_vmalloc_info() to vmalloc.c · db3808c1
      Joonsoo Kim authored
      Now get_vmalloc_info() is in fs/proc/mmu.c.  There is no reason that this
      code must be here and it's implementation needs vmlist_lock and it iterate
      a vmlist which may be internal data structure for vmalloc.
      
      It is preferable that vmlist_lock and vmlist is only used in vmalloc.c
      for maintainability. So move the code to vmalloc.c
      Signed-off-by: default avatarJoonsoo Kim <js1304@gmail.com>
      Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Dave Anderson <anderson@redhat.com>
      Cc: Eric Biederman <ebiederm@xmission.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      db3808c1
  7. 10 Mar, 2013 1 commit
  8. 23 Feb, 2013 1 commit
  9. 11 Dec, 2012 1 commit
  10. 09 Oct, 2012 2 commits
    • Kees Cook's avatar
      mm: use %pK for /proc/vmallocinfo · 45ec1690
      Kees Cook authored
      In the paranoid case of sysctl kernel.kptr_restrict=2, mask the kernel
      virtual addresses in /proc/vmallocinfo too.
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Reported-by: default avatarBrad Spengler <spender@grsecurity.net>
      Acked-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Acked-by: default avatarDavid Rientjes <rientjes@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      45ec1690
    • Konstantin Khlebnikov's avatar
      mm: kill vma flag VM_RESERVED and mm->reserved_vm counter · 314e51b9
      Konstantin Khlebnikov authored
      A long time ago, in v2.4, VM_RESERVED kept swapout process off VMA,
      currently it lost original meaning but still has some effects:
      
       | effect                 | alternative flags
      -+------------------------+---------------------------------------------
      1| account as reserved_vm | VM_IO
      2| skip in core dump      | VM_IO, VM_DONTDUMP
      3| do not merge or expand | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP
      4| do not mlock           | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP
      
      This patch removes reserved_vm counter from mm_struct.  Seems like nobody
      cares about it, it does not exported into userspace directly, it only
      reduces total_vm showed in proc.
      
      Thus VM_RESERVED can be replaced with VM_IO or pair VM_DONTEXPAND | VM_DONTDUMP.
      
      remap_pfn_range() and io_remap_pfn_range() set VM_IO|VM_DONTEXPAND|VM_DONTDUMP.
      remap_vmalloc_range() set VM_DONTEXPAND | VM_DONTDUMP.
      
      [akpm@linux-foundation.org: drivers/vfio/pci/vfio_pci.c fixup]
      Signed-off-by: default avatarKonstantin Khlebnikov <khlebnikov@openvz.org>
      Cc: Alexander Viro <viro@zeniv.linux.org.uk>
      Cc: Carsten Otte <cotte@de.ibm.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Eric Paris <eparis@redhat.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Hugh Dickins <hughd@google.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: James Morris <james.l.morris@oracle.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
      Cc: Matt Helsley <matthltc@us.ibm.com>
      Cc: Nick Piggin <npiggin@kernel.dk>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Suresh Siddha <suresh.b.siddha@intel.com>
      Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
      Cc: Venkatesh Pallipadi <venki@google.com>
      Acked-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      314e51b9
  11. 31 Jul, 2012 2 commits