- 01 11月, 2011 1 次提交
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由 Sam Ravnborg 提交于
SPARC32 require access to the start address. Add a new helper memblock_start_of_DRAM() to give access to the address of the first memblock - which contains the lowest address. The awkward name was chosen to match the already present memblock_end_of_DRAM(). Signed-off-by: NSam Ravnborg <sam@ravnborg.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Yinghai Lu <yinghai@kernel.org> Acked-by: NTejun Heo <tj@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 25 5月, 2011 1 次提交
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由 Yinghai Lu 提交于
On larger systems, information in the kernel log is lost because there is so much early text printed, that it overflows the static log buffer before the log_buf_len kernel parameter can be processed, and a bigger log buffer allocated. Distros are relunctant to increase memory usage by increasing the size of the static log buffer, so minimize the problem by allocating the new log buffer as early as possible. This patch: Add an error return if CONFIG_HAVE_MEMBLOCK is not set instead of having to add #ifdef CONFIG_HAVE_MEMBLOCK around blocks of code calling that function. Signed-off-by: NMike Travis <travis@sgi.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Jack Steiner <steiner@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 13 10月, 2010 1 次提交
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由 Yinghai Lu 提交于
We need to round memory regions correctly -- specifically, we need to round reserved region in the more expansive direction (lower limit down, upper limit up) whereas usable memory regions need to be rounded in the more restrictive direction (lower limit up, upper limit down). This introduces two set of inlines: memblock_region_memory_base_pfn() memblock_region_memory_end_pfn() memblock_region_reserved_base_pfn() memblock_region_reserved_end_pfn() Although they are antisymmetric (and therefore are technically duplicates) the use of the different inlines explicitly documents the programmer's intention. The lack of proper rounding caused a bug on ARM, which was then found to also affect other architectures. Reported-by: NRussell King <rmk@arm.linux.org.uk> Signed-off-by: NYinghai Lu <yinghai@kernel.org> LKML-Reference: <4CB4CDFD.4020105@kernel.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 16 9月, 2010 1 次提交
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由 Yinghai Lu 提交于
Stephen found a bunch of section mismatch warnings with the new memblock changes. Use __init_memblock to replace __init in memblock.c and remove __init in memblock.h. We should not use __init in header files. Reported-by: NStephen Rothwell <sfr@canb.auug.org.au> Tested-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NYinghai Lu <Yinghai@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> LKML-Reference: <4C912709.2090201@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 28 8月, 2010 1 次提交
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由 Yinghai Lu 提交于
So we can avoid export memblock_reserved_init_regions() Suggested by Ben. -v2: use __init_memblock attribute Signed-off-by: NYinghai Lu <yinghai@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 05 8月, 2010 19 次提交
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由 Yinghai Lu 提交于
This is a wrapper for memblock_find_base() using slightly different arguments (start,end instead of start,size for example) in order to make it easier to convert existing arch/x86 code. Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Yinghai Lu 提交于
Arch code can define ARCH_DISCARD_MEMBLOCK in asm/memblock.h, which in turns causes memblock code and data to go respectively into the .init and .initdata sections. This will be used by the x86 architecture. If ARCH_DISCARD_MEMBLOCK is defined, the debugfs files to inspect the memblock arrays after boot are not created. Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Yinghai Lu 提交于
This should make it easier to catch/debug incorrect use when the CONFIG_ option isn't set. Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
And ensure we don't hand out 0 as a valid allocation. We put the low limit at PAGE_SIZE arbitrarily. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Yinghai Lu 提交于
will used by x86 memblock_x86_find_in_range_node and nobootmem replacement Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Yinghai Lu 提交于
This exposes memblock_debug and associated memblock_dbg() macro, along with memblock_can_resize so that x86 can use these when ported to use memblock Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
The former is now strict, it will fail if it cannot honor the allocation within the node, while the later implements the previous semantic which falls back to allocating anywhere. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
We now provide a default (weak) implementation of memblock_nid_range() which uses the early_pfn_map[] if CONFIG_ARCH_POPULATES_NODE_MAP is set. Sparc still needs to use its own method due to the way the pages can be scattered between nodes. This implementation is inefficient due to our main algorithm and callback construct wanting to work on an ascending addresses bases while early_pfn_map[] would rather work with nid's (it's unsorted at that stage). But it should work and we can look into improving it subsequently, possibly using arch compile options to chose a different algorithm alltogether. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Some archs such as ARM want to avoid coalescing accross things such as the lowmem/highmem boundary or similar. This provides the option to control it via an arch callback for which a weak default is provided which always allows coalescing. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
This is in preparation for having resizable arrays. Note that we still allocate one more than needed, this is unchanged from the previous implementation. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Right now, both the "memory" and "reserved" memblock_type structures have a "size" member. It represents the calculated memory size in the former case and is unused in the latter. This moves it out to the main memblock structure instead Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Let's not waste space and cycles on archs that don't support >32-bit physical address space. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
The RMA (RMO is a misnomer) is a concept specific to ppc64 (in fact server ppc64 though I hijack it on embedded ppc64 for similar purposes) and represents the area of memory that can be accessed in real mode (aka with MMU off), or on embedded, from the exception vectors (which is bolted in the TLB) which pretty much boils down to the same thing. We take that out of the generic MEMBLOCK data structure and move it into arch/powerpc where it belongs, renaming it to "RMA" while at it. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
This introduce memblock.current_limit which is used to limit allocations from memblock_alloc() or memblock_alloc_base(..., MEMBLOCK_ALLOC_ACCESSIBLE). The old MEMBLOCK_ALLOC_ANYWHERE changes value from 0 to ~(u64)0 and can still be used with memblock_alloc_base() to allocate really anywhere. It is -no-longer- cropped to MEMBLOCK_REAL_LIMIT which disappears. Note to archs: I'm leaving the default limit to MEMBLOCK_ALLOC_ANYWHERE. I strongly recommend that you ensure that you set an appropriate limit during boot in order to guarantee that an memblock_alloc() at any time results in something that is accessible with a simple __va(). The reason is that a subsequent patch will introduce the ability for the array to resize itself by reallocating itself. The MEMBLOCK core will honor the current limit when performing those allocations. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Nobody uses it anymore. It's semantics were ... weird Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 04 8月, 2010 4 次提交
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由 Benjamin Herrenschmidt 提交于
Walk memblock's using for_each_memblock() and use memblock_region_base/end_pfn() for getting to PFNs. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
To make it fast, we steal ARM's binary search for memblock_is_memory() and we use that to also the replace existing implementation of memblock_is_reserved(). Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 14 7月, 2010 1 次提交
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由 Yinghai Lu 提交于
via following scripts FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/lmb/memblock/g' \ -e 's/LMB/MEMBLOCK/g' \ $FILES for N in $(find . -name lmb.[ch]); do M=$(echo $N | sed 's/lmb/memblock/g') mv $N $M done and remove some wrong change like lmbench and dlmb etc. also move memblock.c from lib/ to mm/ Suggested-by: NIngo Molnar <mingo@elte.hu> Acked-by: N"H. Peter Anvin" <hpa@zytor.com> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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