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  1. 06 10月, 2010 4 次提交
    • Y
      x86, memblock: Remove __memblock_x86_find_in_range_size() · 16c36f74
      由 Yinghai Lu 提交于 
      Fold it into memblock_x86_find_in_range(), and change bad_addr_size()
to check_reserve_memblock().

So whole memblock_x86_find_in_range_size() code is more readable.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
LKML-Reference: <4CAA4DEC.4000401@kernel.org>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      16c36f74
    • Y
      memblock: Fix wraparound in find_region() · f1af98c7
      由 Yinghai Lu 提交于 
      When trying to find huge range for crashkernel, get

[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: at arch/x86/mm/memblock.c:248 memblock_x86_reserve_range+0x40/0x7a()
[    0.000000] Hardware name: Sun Fire x4800
[    0.000000] memblock_x86_reserve_range: wrong range [0xffffffff37000000, 0x137000000)
[    0.000000] Modules linked in:
[    0.000000] Pid: 0, comm: swapper Not tainted 2.6.36-rc5-tip-yh-01876-g1cac214-dirty #59
[    0.000000] Call Trace:
[    0.000000]  [<ffffffff82816f7e>] ? memblock_x86_reserve_range+0x40/0x7a
[    0.000000]  [<ffffffff81078c2d>] warn_slowpath_common+0x85/0x9e
[    0.000000]  [<ffffffff81078d38>] warn_slowpath_fmt+0x6e/0x70
[    0.000000]  [<ffffffff8281e77c>] ? memblock_find_region+0x40/0x78
[    0.000000]  [<ffffffff8281eb1f>] ? memblock_find_base+0x9a/0xb9
[    0.000000]  [<ffffffff82816f7e>] memblock_x86_reserve_range+0x40/0x7a
[    0.000000]  [<ffffffff8280452c>] setup_arch+0x99d/0xb2a
[    0.000000]  [<ffffffff810a3e02>] ? trace_hardirqs_off+0xd/0xf
[    0.000000]  [<ffffffff81cec7d8>] ? _raw_spin_unlock_irqrestore+0x3d/0x4c
[    0.000000]  [<ffffffff827ffcec>] start_kernel+0xde/0x3f1
[    0.000000]  [<ffffffff827ff2d4>] x86_64_start_reservations+0xa0/0xa4
[    0.000000]  [<ffffffff827ff3de>] x86_64_start_kernel+0x106/0x10d
[    0.000000] ---[ end trace a7919e7f17c0a725 ]---
[    0.000000] Reserving 8192MB of memory at 17592186041200MB for crashkernel (System RAM: 526336MB)

This is caused by a wraparound in the test due to size > end;
explicitly check for this condition and fail.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
LKML-Reference: <4CAA4DD3.1080401@kernel.org>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      f1af98c7
    • Y
      x86-32, memblock: Make add_highpages honor early reserved ranges · 1d931264
      由 Yinghai Lu 提交于 
      Originally the only early reserved range that is overlapped with high
pages is "KVA RAM", but we already do remove that from the active ranges.

However, It turns out Xen could have that kind of overlapping to support memory
ballooning.x

So we need to make add_highpage_with_active_regions() to subtract
memblock reserved just like low ram; this is the proper design anyway.

In this patch, refactering get_freel_all_memory_range() to make it can
be used by add_highpage_with_active_regions().  Also we don't need to
remove "KVA RAM" from active ranges.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
LKML-Reference: <4CABB183.1040607@kernel.org>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      1d931264
    • Y
      x86, memblock: Fix crashkernel allocation · 9f4c1396
      由 Yinghai Lu 提交于 
      Cai Qian found crashkernel is broken with the x86 memblock changes.

1. crashkernel=128M@32M always reported that range is used, even if
   the first kernel is small and does not usethat range

2. we always got following report when using "kexec -p"
	Could not find a free area of memory of a000 bytes...
	locate_hole failed

The root cause is that generic memblock_find_in_range() will try to
allocate from the top of the range, whereas the kexec code was written
assuming that allocation was always near the bottom and that it could
blindly extend memory upward.  Unfortunately the kexec code doesn't
have a system for requesting the range that it really needs, so this
is subject to probabilistic failures.

This patch hacks around the problem by limiting the target range
heuristically to below the traditional bzImage max range.  This number
is arbitrary and not always correct, and a much better result would be
obtained by having kexec communicate this number based on the kernel
header information and any appropriate command line options.
Reported-and-Bisected-by: NCAI Qian <caiqian@redhat.com>
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
LKML-Reference: <4CABAF2A.5090501@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      9f4c1396
  3. 16 9月, 2010 2 次提交
  5. 11 9月, 2010 2 次提交
  7. 31 8月, 2010 1 次提交
  9. 29 8月, 2010 25 次提交
  11. 28 8月, 2010 6 次提交