linux.git/arch/x86/kernel/setup_percpu.c, branch v2.6.35

Fix up trivial spelling errors ('taht' -> 'that')

2010-07-21T16:25:42+00:00

Pointed out by Lucas who found the new one in a comment in
setup_percpu.c. And then I fixed the others that I grepped
for.

Reported-by: Lucas 
Signed-off-by: Linus Torvalds

x86, numa: fix boot without RAM on node0 again

2010-07-20T23:25:40+00:00

Commit e534c7c5f8d6 ("numa: x86_64: use generic percpu var
numa_node_id() implementation") broke numa systems that don't have ram
on node0 when MEMORY_HOTPLUG is enabled, because cpu_up() will call
cpu_to_node() before per_cpu(numa_node) is setup for APs.

When Node0 doesn't have RAM, on x86, cpus already round it to nearest
node with RAM in x86_cpu_to_node_map.  and per_cpu(numa_node) is not set
up until in c_init for APs.

When later cpu_up() calling cpu_to_node() will get 0 again, and make it
online even there is no RAM on node0.  so later all APs can not booted up,
and later will have panic.

[    1.611101] On node 0 totalpages: 0
.........
[    2.608558] On node 0 totalpages: 0
[    2.612065] Brought up 1 CPUs
[    2.615199] Total of 1 processors activated (3990.31 BogoMIPS).
...
   93.225341] calling  loop_init+0x0/0x1a4 @ 1
[   93.229314] PERCPU: allocation failed, size=80 align=8, failed to populate
[   93.246539] Pid: 1, comm: swapper Tainted: G        W   2.6.35-rc4-tip-yh-04371-gd64e6c4-dirty #354
[   93.264621] Call Trace:
[   93.266533]  [] pcpu_alloc+0x83a/0x8e7
[   93.270710]  [] __alloc_percpu+0x10/0x12
[   93.285849]  [] alloc_disk_node+0x94/0x16d
[   93.291811]  [] alloc_disk+0x11/0x13
[   93.306157]  [] loop_alloc+0xa7/0x180
[   93.310538]  [] loop_init+0x9b/0x1a4
[   93.324909]  [] ? loop_init+0x0/0x1a4
[   93.329650]  [] do_one_initcall+0x57/0x136
[   93.345197]  [] kernel_init+0x184/0x20e
[   93.348146]  [] kernel_thread_helper+0x4/0x10
[   93.365194]  [] ? restore_args+0x0/0x30
[   93.369305]  [] ? kernel_init+0x0/0x20e
[   93.386011]  [] ? kernel_thread_helper+0x0/0x10
[   93.392047] loop: out of memory
...

Try to assign per_cpu(numa_node) early

[akpm@linux-foundation.org: tidy up code comment]
Signed-off-by: Yinghai 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: Tejun Heo 
Cc: Denys Vlasenko 
Acked-by: Lee Schermerhorn 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-06-03T22:47:22+00:00

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, smpboot: Fix cores per node printing on boot
  x86/amd-iommu: Fall back to GART if initialization fails
  x86/amd-iommu: Fix crash when request_mem_region fails
  x86/mm: Remove unused DBG() macro
  arch/x86/kernel: Add missing spin_unlock

Merge branch 'for-35' of git://repo.or.cz/linux-kbuild

2010-06-01T15:55:52+00:00

* 'for-35' of git://repo.or.cz/linux-kbuild: (81 commits)
  kbuild: Revert part of e8d400a to resolve a conflict
  kbuild: Fix checking of scm-identifier variable
  gconfig: add support to show hidden options that have prompts
  menuconfig: add support to show hidden options which have prompts
  gconfig: remove show_debug option
  gconfig: remove dbg_print_ptype() and dbg_print_stype()
  kconfig: fix zconfdump()
  kconfig: some small fixes
  add random binaries to .gitignore
  kbuild: Include gen_initramfs_list.sh and the file list in the .d file
  kconfig: recalc symbol value before showing search results
  .gitignore: ignore *.lzo files
  headerdep: perlcritic warning
  scripts/Makefile.lib: Align the output of LZO
  kbuild: Generate modules.builtin in make modules_install
  Revert "kbuild: specify absolute paths for cscope"
  kbuild: Do not unnecessarily regenerate modules.builtin
  headers_install: use local file handles
  headers_check: fix perl warnings
  export_report: fix perl warnings
  ...

x86/mm: Remove unused DBG() macro

2010-05-31T08:01:53+00:00

DBG() macro for CONFIG_DEBUG_PER_CPU_MAPS is unused.

Signed-off-by: Akinobu Mita 
LKML-Reference: <1274706291-13554-1-git-send-email-akinobu.mita@gmail.com>
Signed-off-by: Ingo Molnar

numa: x86_64: use generic percpu var numa_node_id() implementation

2010-05-27T16:12:57+00:00

x86 arch specific changes to use generic numa_node_id() based on generic
percpu variable infrastructure.  Back out x86's custom version of
numa_node_id()

Signed-off-by: Lee Schermerhorn 
Cc: Tejun Heo 
Cc: Mel Gorman 
Cc: Christoph Lameter 
Cc: Nick Piggin 
Cc: David Rientjes 
Cc: Eric Whitney 
Cc: KAMEZAWA Hiroyuki 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Cc: "Luck, Tony" 
Cc: Pekka Enberg 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Rename .data.init to .data..init.

2010-03-03T10:26:01+00:00

Signed-off-by: Denys Vlasenko 
Signed-off-by: Michal Marek

early_res: Add free_early_partial()

2010-02-26T07:25:35+00:00

To free partial areas in pcpu_setup...

Reported-by: Peter Zijlstra 
Signed-off-by: Yinghai Lu 
Cc: Tejun Heo 
Cc: Christoph Lameter 
Cc: Stephen Rothwell 
Cc: Linus Torvalds 
Cc: Jesse Barnes 
Cc: Pekka Enberg 
LKML-Reference: <4B85E245.5030001@kernel.org>
Signed-off-by: Ingo Molnar

x86: setup_percpu.c: Use pr_ and add pr_fmt(fmt)

2009-12-10T07:57:50+00:00

- Added #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 - Stripped PERCPU: from a pr_warning

Signed-off-by: Joe Perches 
LKML-Reference: <7ead24eccbea8f2b11795abad3e2893a98e1e111.1260383912.git.joe@perches.com>
Signed-off-by: Ingo Molnar

x86,percpu: use embedding for 64bit NUMA and page for 32bit NUMA

2009-08-14T06:00:52+00:00

Embedding percpu first chunk allocator can now handle very sparse unit
mapping.  Use embedding allocator instead of lpage for 64bit NUMA.
This removes extra TLB pressure and the need to do complex and fragile
dancing when changing page attributes.

For 32bit, using very sparse unit mapping isn't a good idea because
the vmalloc space is very constrained.  32bit NUMA machines aren't
exactly the focus of optimization and it isn't very clear whether
lpage performs better than page.  Use page first chunk allocator for
32bit NUMAs.

As this leaves setup_pcpu_*() functions pretty much empty, fold them
into setup_per_cpu_areas().

Signed-off-by: Tejun Heo 
Cc: Ingo Molnar 
Cc: Andi Kleen