- 21 10月, 2008 2 次提交
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由 Milton Miller 提交于
numa_enforce_memory_limit tried to be smart and only call lmb_end_of_DRAM when a memory limit was set via mem= on the command line. However, the early boot code will also limit memory added to the lmb system when iommu=off is specified. When this happens, the page allocator is given pages not in the linear mapping and this results in a fatal data reference to the unmapped page. Signed-off-by: NMilton Miller <miltonm@bga.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Jon Tollefson 提交于
Adjust amount to reserve based on previous nodes for reserves spanning multiple nodes. Check if the node active range is empty before attempting to pass the reserve to bootmem. In practice the range shouldn't be empty, but to be sure we check. Signed-off-by: NJon Tollefson <kniht@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 10 10月, 2008 1 次提交
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由 Jon Tollefson 提交于
If there are multiple reserved memory blocks via lmb_reserve() that are contiguous addresses and on different NUMA nodes we are losing track of which address ranges to reserve in bootmem on which node. I discovered this when I recently got to try 16GB huge pages on a system with more then 2 nodes. When scanning the device tree in early boot we call lmb_reserve() with the addresses of the 16G pages that we find so that the memory doesn't get used for something else. For example the addresses for the pages could be 4000000000, 4400000000, 4800000000, 4C00000000, etc - 8 pages, one on each of eight nodes. In the lmb after all the pages have been reserved it will look something like the following: lmb_dump_all: memory.cnt = 0x2 memory.size = 0x3e80000000 memory.region[0x0].base = 0x0 .size = 0x1e80000000 memory.region[0x1].base = 0x4000000000 .size = 0x2000000000 reserved.cnt = 0x5 reserved.size = 0x3e80000000 reserved.region[0x0].base = 0x0 .size = 0x7b5000 reserved.region[0x1].base = 0x2a00000 .size = 0x78c000 reserved.region[0x2].base = 0x328c000 .size = 0x43000 reserved.region[0x3].base = 0xf4e8000 .size = 0xb18000 reserved.region[0x4].base = 0x4000000000 .size = 0x2000000000 The reserved.region[0x4] contains the 16G pages. In arch/powerpc/mm/num.c: do_init_bootmem() we loop through each of the node numbers looking for the reserved regions that belong to the particular node. It is not able to identify region 0x4 as being a part of each of the 8 nodes. It is assuming that a reserved region is only on a single node. This patch takes out the reserved region loop from inside the loop that goes over each node. It looks up the active region containing the start of the reserved region. If it extends past that active region then it adjusts the size and gets the next active region containing it. Signed-off-by: NJon Tollefson <kniht@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 16 9月, 2008 1 次提交
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由 Chandru 提交于
Kdump kernel needs to use only those memory regions that it is allowed to use (crashkernel, rtas, tce, etc.). Each of these regions have their own sizes and are currently added under 'linux,usable-memory' property under each memory@xxx node of the device tree. The ibm,dynamic-memory property of ibm,dynamic-reconfiguration-memory node (on POWER6) now stores in it the representation for most of the logical memory blocks with the size of each memory block being a constant (lmb_size). If one or more or part of the above mentioned regions lie under one of the lmb from ibm,dynamic-memory property, there is a need to identify those regions within the given lmb. This makes the kernel recognize a new 'linux,drconf-usable-memory' property added by kexec-tools. Each entry in this property is of the form of a count followed by that many (base, size) pairs for the above mentioned regions. The number of cells in the count value is given by the #size-cells property of the root node. Signed-off-by: NChandru Siddalingappa <chandru@in.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 25 7月, 2008 1 次提交
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由 Johannes Weiner 提交于
There are a lot of places that define either a single bootmem descriptor or an array of them. Use only one central array with MAX_NUMNODES items instead. Signed-off-by: NJohannes Weiner <hannes@saeurebad.de> Acked-by: NRalf Baechle <ralf@linux-mips.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: David S. Miller <davem@davemloft.net> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 03 7月, 2008 2 次提交
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由 Nathan Fontenot 提交于
Update the association of a memory section with a numa node that occurs during hotplug add of a memory section. This adds a check in the hot_add_scn_to_nid() routine for the ibm,dynamic-reconfiguration-memory node in the device tree. If present the new hot_add_drconf_scn_to_nid() routine is invoked, which can properly parse the ibm,dynamic-reconfiguration-memory node of the device tree and make the proper numa node associations. This also introduces the valid_hot_add_scn() routine as a helper function for code that is common to the hot_add_scn_to_nid() and hot_add_drconf_scn_to_nid() routines. Signed-off-by: NNathan Fontenot <nfont@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Nathan Fontenot 提交于
This splits off several pieces of code that parse the ibm,dynamic-reconfiguration-memory node of the device tree into separate helper routines. This is in preparation for the next commit that will use these helper routines. There are no functional changes in this patch. Signed-off-by: NNathan Fontenot <nfont@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 24 4月, 2008 1 次提交
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由 Michael Ellerman 提交于
numa.c requires routines declared in linux/of.h, so should include it. Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 14 2月, 2008 1 次提交
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 08 2月, 2008 1 次提交
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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>
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- 07 2月, 2008 1 次提交
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由 Balbir Singh 提交于
Here's a dumb simple implementation of fake NUMA nodes for PowerPC. Fake NUMA nodes can be specified using the following command line option numa=fake=<node range> node range is of the format <range1>,<range2>,...<rangeN> Each of the rangeX parameters is passed using memparse(). I find the patch useful for fake NUMA emulation on my simple PowerPC machine. I've tested it on a numa box with the following arguments numa=fake=512M numa=fake=512M,768M numa=fake=256M,512M mem=512M numa=fake=1G mem=768M numa=fake= without any numa= argument The other side-effect introduced by this patch is that; in the case where we don't have NUMA information, we now set a node online after adding each LMB. This node could very well be node 0, but in the case that we enable fake NUMA nodes, when we cross node boundaries, we need to set the new node online. Signed-off-by: NBalbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 26 1月, 2008 1 次提交
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由 Paul Mackerras 提交于
This reverts commit 5c3f5892, basically because it changes behaviour even when no fake NUMA information is specified on the kernel command line. Firstly, it changes the nid, thus destroying the real NUMA information. Secondly, it also changes behaviour in that if a node ends up with no memory in it because of the memory limit, we used to set it online and now we don't. Also, in the non-NUMA case with no fake NUMA information, we do node_set_online once for each LMB now, whereas previously we only did it once. I don't know if that is actually a problem, but it does seem unnecessary. Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 20 12月, 2007 1 次提交
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由 Balbir Singh 提交于
Here's a dumb simple implementation of fake NUMA nodes for PowerPC. Fake NUMA nodes can be specified using the following command line option numa=fake=<node range> node range is of the format <range1>,<range2>,...<rangeN> Each of the rangeX parameters is passed using memparse(). I find this useful for fake NUMA emulation on my simple PowerPC machine. I've tested it on a non-numa box with the following arguments: numa=fake=1G numa=fake=1G,2G name=fake=1G,512M,2G numa=fake=1500M,2800M mem=3500M numa=fake=1G mem=512M numa=fake=1G mem=1G Signed-off-by: NBalbir Singh <balbir@linux.vnet.ibm.com> Acked-by: NOlof Johansson <olof@lixom.net> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 03 8月, 2007 1 次提交
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由 Michael Ellerman 提交于
Some new machines use the "ibm,dynamic-reconfiguration-memory" property to provide memory layout information, rather than via memory nodes. There is a bug in the code to parse this property for start addresses over 4GB; we store the start address in an unsigned int, which means we throw away the high bits and add apparently duplicate regions. This results in a BUG() in free_bootmem_core(). This fixes it by using an unsigned long instead. Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 10 5月, 2007 1 次提交
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由 Rafael J. Wysocki 提交于
Since nonboot CPUs are now disabled after tasks and devices have been frozen and the CPU hotplug infrastructure is used for this purpose, we need special CPU hotplug notifications that will help the CPU-hotplug-aware subsystems distinguish normal CPU hotplug events from CPU hotplug events related to a system-wide suspend or resume operation in progress. This patch introduces such notifications and causes them to be used during suspend and resume transitions. It also changes all of the CPU-hotplug-aware subsystems to take these notifications into consideration (for now they are handled in the same way as the corresponding "normal" ones). [oleg@tv-sign.ru: cleanups] Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: NOleg Nesterov <oleg@tv-sign.ru> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 13 4月, 2007 3 次提交
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由 Stephen Rothwell 提交于
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Stephen Rothwell 提交于
This is more consistent and gets us closer to the Sparc code. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Stephen Rothwell 提交于
This is more consistent and gets us closer to the Sparc code. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 18 2月, 2007 1 次提交
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由 Uwe Kleine-König 提交于
heirarchical, hierachical -> hierarchical heirarchy, hierachy -> hierarchy Signed-off-by: NUwe Kleine-König <zeisberg@informatik.uni-freiburg.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 11 12月, 2006 1 次提交
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由 Paul Mackerras 提交于
For PAPR partitions with large amounts of memory, the firmware has an alternative, more compact representation for the information about the memory in the partition and its NUMA associativity information. This adds the code to the kernel to parse this alternative representation. The other part of this patch is telling the firmware that we can handle the alternative representation. There is however a subtlety here, because the firmware will invoke a reboot if the memory representation we request is different from the representation that firmware is currently using. This is because firmware can't change the representation on the fly. Further, some firmware versions used on POWER5+ machines have a bug where this reboot leaves the machine with an altered value of load-base, which will prevent any kernel booting until it is reset to the normal value (0x4000). Because of this bug, we do NOT set fake_elf.rpanote.new_mem_def = 1, and thus we do not request the new representation on POWER5+ and earlier machines. We do request the new representation on POWER6, which uses the ibm,client-architecture-support call. Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 12 10月, 2006 1 次提交
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由 Mel Gorman 提交于
Arch-independent zone-sizing is using indices instead of symbolic names to offset within an array related to zones (max_zone_pfns). The unintended impact is that ZONE_DMA and ZONE_NORMAL is initialised on powerpc instead of ZONE_DMA and ZONE_HIGHMEM when CONFIG_HIGHMEM is set. As a result, the the machine fails to boot but will boot with CONFIG_HIGHMEM turned off. The following patch properly initialises the max_zone_pfns[] array and uses symbolic names instead of indices in each architecture using arch-independent zone-sizing. Two users have successfully booted their powerpcs with it (one an ibook G4). It has also been boot tested on x86, x86_64, ppc64 and ia64. Please merge for 2.6.19-rc2. Credit to Benjamin Herrenschmidt for identifying the bug and rolling the first fix. Additional credit to Johannes Berg and Andreas Schwab for reporting the problem and testing on powerpc. Signed-off-by: NMel Gorman <mel@csn.ul.ie> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 27 9月, 2006 1 次提交
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由 Mel Gorman 提交于
Size zones and holes in an architecture independent manner for Power. [judith@osdl.org: build fix] Signed-off-by: NMel Gorman <mel@csn.ul.ie> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Andi Kleen <ak@muc.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Keith Mannthey" <kmannth@gmail.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 31 7月, 2006 1 次提交
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由 Jeremy Kerr 提交于
Now that get_property() returns a void *, there's no need to cast its return value. Also, treat the return value as const, so we can constify get_property later. powerpc core changes. Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 28 6月, 2006 1 次提交
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由 Chandra Seetharaman 提交于
Make notifier_blocks associated with cpu_notifier as __cpuinitdata. __cpuinitdata makes sure that the data is init time only unless CONFIG_HOTPLUG_CPU is defined. Signed-off-by: NChandra Seetharaman <sekharan@us.ibm.com> Cc: Ashok Raj <ashok.raj@intel.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 02 5月, 2006 1 次提交
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由 Jeremy Kerr 提交于
Change of_node_to_nid() to traverse the device tree, looking for a numa id. Cell uses this to assign ids to SPUs, which are children of the CPU node. Existing users of of_node_to_nid() are altered to use of_node_to_nid_single(), which doesn't do the traversal. Export an attach_sysdev_to_node() function, allowing system devices (eg. SPUs) to link themselves into the numa topology in sysfs. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 22 4月, 2006 1 次提交
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由 Olof Johansson 提交于
Quieten some of the debug ram config output. we already print out available memory at KERN_INFO level. Signed-off-by: NOlof Johansson <olof@lixom.net> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 27 3月, 2006 1 次提交
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由 Andrew Morton 提交于
The return statement is to prevent `warning: 'nid' might be used uninitialized in this function'. Cc: Nathan Lynch <nathanl@austin.ibm.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 22 3月, 2006 7 次提交
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由 Nathan Lynch 提交于
We can plug the boot cpu into its node independently of whether numa topology is detected. And numa_setup_cpu does the right thing for all cases now, so remove special-casing for non-numa from the cpu hotplug callback. Signed-off-by: NNathan Lynch <nathanl@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Nathan Lynch 提交于
The powerpc numa code unconditionally onlines all nodes from 0 to the highest node id found, regardless of whether cpus or memory are present in the nodes. This wastes 8K per node and complicates some cpu and memory hotplug situations, such as adding a resource that doesn't map to one of the nodes discovered at boot. Set nodes online as resources are scanned. Fall back to node 0 only when we're sure this isn't a NUMA machine. Instead of defaulting to node 0 for cases of hot-adding a resource which doesn't belong to any initialized node, assign it to the first online node. Signed-off-by: NNathan Lynch <nathanl@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Nathan Lynch 提交于
Code to handle Power4's invalid node id (0xffff) is duplicated for cpu and memory. Better to handle this case in one place -- of_node_to_nid. Overall behavior should be unchanged. Signed-off-by: NNathan Lynch <nathanl@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Nathan Lynch 提交于
Since we effectively treat the domain ids given to us by firmare as logical node ids, make this explicit (basically s/numa_domain/nid/). No functional changes, only variable and function names are modified. Signed-off-by: NNathan Lynch <nathanl@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Nathan Lynch 提交于
map_cpu_to_node does not need to be inline, it is never called in a hot path. map_cpu_to_node, numa_setup_cpu, and find_cpu_node can be marked __cpuinit, as they are never used after boot if CONFIG_HOTPLUG_CPU=n. Signed-off-by: NNathan Lynch <nathanl@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Nathan Lynch 提交于
Add debug statement for map_cpu_to_node; it's useful for cpu hotplug. Clarify debug statement about not finding the numa reference points property. Don't print a meaningless associativity depth (-1) on non-numa systems. Signed-off-by: NNathan Lynch <nathanl@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Nathan Lynch 提交于
At boot, the numa code is assigning boot_cpuid to node 0 unconditionally. Basically, numa_setup_cpu is being stupid about it, but this is the minimal fix -- just call numa_setup_cpu(boot_cpuid) later, after all nodes have been set online. Signed-off-by: NNathan Lynch <nathanl@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 07 2月, 2006 1 次提交
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由 Michael Ellerman 提交于
Currently most callers of lmb_alloc() don't check if it worked or not, if it ever does weird bad things will probably happen. The few callers who do check just panic or BUG_ON. So make lmb_alloc() panic internally, to catch bugs at the source. The few callers who did check the result no longer need to. The only caller that did anything interesting with the return result was careful_allocation(). For it we create __lmb_alloc_base() which _doesn't_ panic automatically, a little messy, but passable. Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 09 1月, 2006 5 次提交
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由 Mike Kravetz 提交于
The system will oops if an attempt is made to add memory to an empty node/zone. This patch prevents adding memory to an empty node. The code to dynamically add a node/zone is non-trivial. This patch is temporary and will be removed when the ability to dynamically add a node/zone is complete. Signed-off-by: NMike Kravetz <kravetz@us.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
The pre-parsed addrs/n_addrs fields in struct device_node are finally gone. Remove the dodgy heuristics that did that parsing at boot and remove the fields themselves since we now have a good replacement with the new OF parsing code. This patch also fixes a bunch of drivers to use the new code instead, so that at least pmac32, pseries, iseries and g5 defconfigs build. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Anton Blanchard 提交于
We used to print a NUMA cpu summary at boot before the hotplug cpu code was added. This has been useful for catching machine configuration as well as firmware bugs in the past. This patch restores that functionality. An example of the output is: Node 0 CPUs: 0-7 Node 1 CPUs: 8-15 Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Michael Ellerman 提交于
Milton has proposed that we should support a "linux,usable-memory" property on memory nodes which describes, in preference to "reg", the regions of memory Linux should use. This facility is required for kdump to inform the second kernel which memory it should use. Signed-off-by: NHaren Myneni <haren@us.ibm.com> Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Mike Kravetz 提交于
This places dynamically added memory within the appropriate numa node. A new routine hot_add_scn_to_nid() replicates most of the memory scanning code in parse_numa_properties(). Signed-off-by: NMike Kravetz <kravetz@us.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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