Skip to content

C
clone-Linux

gsplhtlxg / clone-Linux

通知 2
Star 0
Fork 1
C
clone-Linux

体验新版 GitCode，发现更多精彩内容 >>

切换分支/标签
  1. 10 11月, 2009 1 次提交
    • F
      bootmem: Add free_bootmem_late() · 9f993ac3
      由 FUJITA Tomonori 提交于 
      Add a new function for freeing bootmem after the bootmem
allocator has been released and the unreserved pages given to
the page allocator.

This allows us to reserve bootmem and then release it if we
later discover it was not needed.

( This new API will be used by the swiotlb code to recover
  a significant amount of RAM (64MB). )
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: NPekka Enberg <penberg@cs.helsinki.fi>
Cc: chrisw@sous-sol.org
Cc: dwmw2@infradead.org
Cc: joerg.roedel@amd.com
Cc: muli@il.ibm.com
Cc: hannes@cmpxchg.org
Cc: tj@kernel.org
Cc: akpm@linux-foundation.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1257849980-22640-7-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      9f993ac3
  3. 22 9月, 2009 1 次提交
  5. 01 4月, 2009 1 次提交
  7. 24 2月, 2009 2 次提交
    • T
      bootmem: reorder interface functions and add a missing one · 2d0aae41
      由 Tejun Heo 提交于 
      Impact: cleanup and addition of missing interface wrapper

The interface functions in bootmem.h was ordered in not so orderly
manner.  Reorder them such that

* functions allocating the same area group together -
  ie. alloc_bootmem group and alloc_bootmem_low group.

* functions w/o node parameter come before the ones w/ node parameter.

* nopanic variants are immediately below their panicky counterparts.

While at it, add alloc_bootmem_pages_node_nopanic() which was missing.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@saeurebad.de>
      2d0aae41
    • T
      bootmem: clean up arch-specific bootmem wrapping · c1329375
      由 Tejun Heo 提交于 
      Impact: cleaner and consistent bootmem wrapping

By setting CONFIG_HAVE_ARCH_BOOTMEM_NODE, archs can define
arch-specific wrappers for bootmem allocation.  However, this is done
a bit strangely in that only the high level convenience macros can be
changed while lower level, but still exported, interface functions
can't be wrapped.  This not only is messy but also leads to strange
situation where alloc_bootmem() does what the arch wants it to do but
the equivalent __alloc_bootmem() call doesn't although they should be
able to be used interchangeably.

This patch updates bootmem such that archs can override / wrap the
backend function - alloc_bootmem_core() instead of the highlevel
interface functions to allow simpler and consistent wrapping.  Also,
HAVE_ARCH_BOOTMEM_NODE is renamed to HAVE_ARCH_BOOTMEM.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@saeurebad.de>
      c1329375
  9. 13 8月, 2008 1 次提交
  11. 26 7月, 2008 1 次提交
  13. 25 7月, 2008 6 次提交
  15. 08 7月, 2008 1 次提交
  17. 22 6月, 2008 1 次提交
  19. 28 4月, 2008 1 次提交
  21. 08 2月, 2008 1 次提交
    • B
      Introduce flags for reserve_bootmem() · 72a7fe39
      由 Bernhard Walle 提交于 
      This patchset adds a flags variable to reserve_bootmem() and uses the
BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions
between crashkernel area and already used memory.

This patch:

Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE.
If that flag is set, the function returns with -EBUSY if the memory already
has been reserved in the past.  This is to avoid conflicts.

Because that code runs before SMP initialisation, there's no race condition
inside reserve_bootmem_core().

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix powerpc build]
Signed-off-by: NBernhard Walle <bwalle@suse.de>
Cc: <linux-arch@vger.kernel.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      72a7fe39
  23. 30 10月, 2007 1 次提交
  25. 01 6月, 2007 1 次提交
  27. 03 5月, 2007 1 次提交
    • R
      [PATCH] x86-64: Set HASHDIST_DEFAULT to 1 for x86_64 NUMA · e073ae1b
      由 Ravikiran G Thirumalai 提交于 
      Enable system hashtable memory to be distributed among nodes on x86_64 NUMA

Forcing the kernel to use node interleaved vmalloc instead of bootmem for
the system hashtable memory (alloc_large_system_hash) reduces the memory
imbalance on node 0 by around 40MB on a 8 node x86_64 NUMA box:

Before the following patch, on bootup of a 8 node box:

Node 0 MemTotal:      3407488 kB
Node 0 MemFree:       3206296 kB
Node 0 MemUsed:        201192 kB
Node 0 Active:           7012 kB
Node 0 Inactive:          512 kB
Node 0 Dirty:               0 kB
Node 0 Writeback:           0 kB
Node 0 FilePages:        1912 kB
Node 0 Mapped:            420 kB
Node 0 AnonPages:        5612 kB
Node 0 PageTables:        468 kB
Node 0 NFS_Unstable:        0 kB
Node 0 Bounce:              0 kB
Node 0 Slab:             5408 kB
Node 0 SReclaimable:      644 kB
Node 0 SUnreclaim:       4764 kB

After the patch (or using hashdist=1 on the kernel command line):

Node 0 MemTotal:      3407488 kB
Node 0 MemFree:       3247608 kB
Node 0 MemUsed:        159880 kB
Node 0 Active:           3012 kB
Node 0 Inactive:          616 kB
Node 0 Dirty:               0 kB
Node 0 Writeback:           0 kB
Node 0 FilePages:        2424 kB
Node 0 Mapped:            380 kB
Node 0 AnonPages:        1200 kB
Node 0 PageTables:        396 kB
Node 0 NFS_Unstable:        0 kB
Node 0 Bounce:              0 kB
Node 0 Slab:             6304 kB
Node 0 SReclaimable:     1596 kB
Node 0 SUnreclaim:       4708 kB

I guess it is a good idea to keep HASHDIST_DEFAULT "on" for x86_64 NUMA
since x86_64 has no dearth of vmalloc space?  Or maybe enable hash
distribution for all 64bit NUMA arches?  The following patch does it only
for x86_64.

I ran a HPC MPI benchmark -- 'Ansys wingsolid', which takes up quite a bit of
memory and uses up tlb entries.  This was on a 4 way, 2 socket
Tyan AMD box (non vsmp), with 8G total memory (4G pernode).

The results with and without hash distribution are:

1. Vanilla - runtime of 1188.000s
2. With hashdist=1 runtime of 1154.000s

Oprofile output for the duration of run is:

1. Vanilla:
PU: AMD64 processors, speed 2411.16 MHz (estimated)
Counted L1_AND_L2_DTLB_MISSES events (L1 and L2 DTLB misses) with a unit
mask of 0x00 (No unit mask) count 500
samples  %        app name                 symbol name
163054    6.5513  libansys1.so             MultiFront::decompose(int, int,
Elemset *, int *, int, int, int)
162061    6.5114  libansys3.so             blockSaxpy6L_fd
162042    6.5107  libansys3.so             blockInnerProduct6L_fd
156286    6.2794  libansys3.so             maxb33_
87879     3.5309  libansys1.so             elmatrixmultpcg_
84857     3.4095  libansys4.so             saxpy_pcg
58637     2.3560  libansys4.so             .st4560
46612     1.8728  libansys4.so             .st4282
43043     1.7294  vmlinux-t                copy_user_generic_string
41326     1.6604  libansys3.so             blockSaxpyBackSolve6L_fd
41288     1.6589  libansys3.so             blockInnerProductBackSolve6L_fd

2. With hashdist=1
CPU: AMD64 processors, speed 2411.13 MHz (estimated)
Counted L1_AND_L2_DTLB_MISSES events (L1 and L2 DTLB misses) with a unit
mask of 0x00 (No unit mask) count 500
samples  %        app name                 symbol name
162993    6.9814  libansys1.so             MultiFront::decompose(int, int,
Elemset *, int *, int, int, int)
160799    6.8874  libansys3.so             blockInnerProduct6L_fd
160459    6.8729  libansys3.so             blockSaxpy6L_fd
156018    6.6826  libansys3.so             maxb33_
84700     3.6279  libansys4.so             saxpy_pcg
83434     3.5737  libansys1.so             elmatrixmultpcg_
58074     2.4875  libansys4.so             .st4560
46000     1.9703  libansys4.so             .st4282
41166     1.7632  libansys3.so             blockSaxpyBackSolve6L_fd
41033     1.7575  libansys3.so             blockInnerProductBackSolve6L_fd
35762     1.5318  libansys1.so             inner_product_sub
35591     1.5245  libansys1.so             inner_product_sub2
28259     1.2104  libansys4.so             addVectors
Signed-off-by: NPravin B. Shelar <pravin.shelar@calsoftinc.com>
Signed-off-by: NRavikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: NShai Fultheim <shai@scalex86.org>
Signed-off-by: NAndi Kleen <ak@suse.de>
Acked-by: NChristoph Lameter <clameter@engr.sgi.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      e073ae1b
  29. 23 3月, 2007 1 次提交
  31. 08 12月, 2006 1 次提交
  33. 26 9月, 2006 5 次提交
  35. 23 9月, 2006 1 次提交
    • D
      [XFRM]: Dynamic xfrm_state hash table sizing. · f034b5d4
      由 David S. Miller 提交于 
      The grow algorithm is simple, we grow if:

1) we see a hash chain collision at insert, and
2) we haven't hit the hash size limit (currently 1*1024*1024 slots), and
3) the number of xfrm_state objects is > the current hash mask

All of this needs some tweaking.

Remove __initdata from "hashdist" so we can use it safely at run time.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f034b5d4
  37. 11 7月, 2006 1 次提交
    • D
      [PATCH] FRV: Fix FRV arch compile errors · 9dec17eb
      由 David Howells 提交于 
      Fix some FRV arch compile errors, including:

 (*) Marking nr_kernel_pages as __meminitdata so that references to it end up
     being properly calculated rather than being assumed to be in the small
     data section (and thus calculated wrt the GP register).  Not doing this
     causes the linker to emit errors as the offset is too big to fit into the
     load instruction.

 (*) Move pm_power_off into an unconditionally compiled .c file as it's now
     unconditionally accessed.

 (*) Declare frv_change_cmode() in a header file rather than in a .c file, and
     declare it asmlinkage.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      9dec17eb
  39. 23 6月, 2006 1 次提交
  41. 10 4月, 2006 1 次提交
    • A
      [PATCH] x86_64: Handle empty PXMs that only contain hotplug memory · a8062231
      由 Andi Kleen 提交于 
      The node setup code would try to allocate the node metadata in the node
itself, but that fails if there is no memory in there.

This can happen with memory hotplug when the hotplug area defines an so
far empty node.

Now use bootmem to try to allocate the mem_map in other nodes.

And if it fails don't panic, but just ignore the node.

To make this work I added a new __alloc_bootmem_nopanic function that
does what its name implies.

TBD should try to use nearby nodes here.  Currently we just use any.
It's hard to do it better because bootmem doesn't have proper fallback
lists yet.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a8062231
  43. 28 3月, 2006 1 次提交
  45. 26 3月, 2006 1 次提交
  47. 07 1月, 2006 1 次提交
  49. 20 10月, 2005 1 次提交
    • Y
      [PATCH] swiotlb: make sure initial DMA allocations really are in DMA memory · 281dd25c
      由 Yasunori Goto 提交于 
      This introduces a limit parameter to the core bootmem allocator; The new
parameter indicates that physical memory allocated by the bootmem
allocator should be within the requested limit.

We also introduce alloc_bootmem_low_pages_limit, alloc_bootmem_node_limit,
alloc_bootmem_low_pages_node_limit apis, but alloc_bootmem_low_pages_limit
is the only api used for swiotlb.

The existing alloc_bootmem_low_pages() api could instead have been
changed and made to pass right limit to the core allocator.  But that
would make the patch more intrusive for 2.6.14, as other arches use
alloc_bootmem_low_pages().  We may be done that post 2.6.14 as a
cleanup.

With this, swiotlb gets memory within 4G for both x86_64 and ia64
arches.
Signed-off-by: NYasunori Goto <y-goto@jp.fujitsu.com>
Cc: Ravikiran G Thirumalai <kiran@scalex86.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      281dd25c
  51. 26 6月, 2005 1 次提交
  53. 24 6月, 2005 1 次提交
  55. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      由 Linus Torvalds 提交于 
      Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
      1da177e4