07 Jan, 2009
1 commit
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Show node to memory section relationship with symlinks in sysfs
Add /sys/devices/system/node/nodeX/memoryY symlinks for all
the memory sections located on nodeX. For example:
/sys/devices/system/node/node1/memory135 -> ../../memory/memory135
indicates that memory section 135 resides on node1.Also revises documentation to cover this change as well as updating
Documentation/ABI/testing/sysfs-devices-memory to include descriptions
of memory hotremove files 'phys_device', 'phys_index', and 'state'
that were previously not described there.In addition to it always being a good policy to provide users with
the maximum possible amount of physical location information for
resources that can be hot-added and/or hot-removed, the following
are some (but likely not all) of the user benefits provided by
this change.
Immediate:
- Provides information needed to determine the specific node
on which a defective DIMM is located. This will reduce system
downtime when the node or defective DIMM is swapped out.
- Prevents unintended onlining of a memory section that was
previously offlined due to a defective DIMM. This could happen
during node hot-add when the user or node hot-add assist script
onlines _all_ offlined sections due to user or script inability
to identify the specific memory sections located on the hot-added
node. The consequences of reintroducing the defective memory
could be ugly.
- Provides information needed to vary the amount and distribution
of memory on specific nodes for testing or debugging purposes.
Future:
- Will provide information needed to identify the memory
sections that need to be offlined prior to physical removal
of a specific node.Symlink creation during boot was tested on 2-node x86_64, 2-node
ppc64, and 2-node ia64 systems. Symlink creation during physical
memory hot-add tested on a 2-node x86_64 system.Signed-off-by: Gary Hade
Signed-off-by: Badari Pulavarty
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Dec, 2008
6 commits
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Split pages returned by dma_alloc_coherent() and make sure
we free them one by one.Signed-off-by: Magnus Damm
Signed-off-by: Paul Mundt -
This migrates from the old bitrotted kgdb stub implementation and moves
to the generic stub. In the process support for SH-2/SH-2A is also added,
which the old stub never provided.Signed-off-by: Paul Mundt
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This ought to be unsigned long, rather than defaulting to int.
Signed-off-by: Paul Mundt
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This converts the sh64 /proc/asids entry to debugfs and enables it for
all SH parts that have debugfs enabled.On MMU systems this can be used to determine which processes are using
which ASIDs which in turn can be used for finer grained cache tag
analysis.Signed-off-by: Paul Mundt
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This patch adds a pass-through case when ioremapping P4 addresses.
Addresses passed to ioremap() should be physical addresses, so the
best option is usually to convert the virtual address to a physical
address before calling ioremap. This will give you a virtual address
in P2 which matches the physical address and this works well for
most internal hardware blocks on the SuperH architecture.However, some hardware blocks must be accessed through P4. Converting
the P4 address to a physical and then back to a P2 does not work. One
example of this is the sh7722 TMU block, it must be accessed through P4.Without this patch P4 addresses will be mapped using PTEs which
requires the page allocator to be up and running.Signed-off-by: Magnus Damm
Signed-off-by: Paul Mundt -
Now that arch/sh/mm/mmap.c exists, move arch_get_unmapped_area() there.
Follows the ARM change.Signed-off-by: Paul Mundt
13 Nov, 2008
1 commit
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Signed-off-by: Paul Mundt
12 Nov, 2008
1 commit
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With the PMB enabled, only P1SEG and up are covered by the PMB mappings,
meaning that situations where out-of-bounds physical addresses are read
from will lead to TLB reset after the PMB miss, allowing for use cases
like dd if=/dev/mem to reset the TLB.Fix this up to make sure the reference is between __MEMORY_START (phys)
and __pa(high_memory). This is coherent across all variants of sh/sh64
with and without MMU, though the PMB bug itself is only applicable to
SH-4A parts.Reported-by: Hideo Saito
Signed-off-by: Paul Mundt
10 Nov, 2008
1 commit
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There was a race in the kmap_coherent() implementation. While we
guarded against preemption, there was nothing preventing eviction of
the pre-faulted fixmap entry from the UTLB. Under certain workloads
this would result in the fixmap entries used for cache colouring being
evicted from the UTLB in the midst of a copy_page().In addition to pre-faulting, we also make sure to preserve the PTEs
in the kernel page table and introduce a cached PTE for kmap_coherent()
usage. This follows a similar change on MIPS ("[MIPS] Fix aliasing bug
in copy_to_user_page / copy_from_user_page").Reported-by: Hideo Saito
Reported-by: CHIKAMA Masaki
Tested-by: Yoshihiro Shimoda
Signed-off-by: Paul Mundt
31 Oct, 2008
1 commit
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fix sh2a cache entry_mask in __flush_{purge,invalidate}_region.
Signed-off-by: Yoshihiro Shimoda
Signed-off-by: Paul Mundt
21 Oct, 2008
1 commit
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Use the generic remove_memory() provided by mm/memory_hotplug.c instead.
Signed-off-by: Andrew Morton
Signed-off-by: Paul Mundt
20 Oct, 2008
2 commits
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Remove left overs from the generic declared coherent rework.
Signed-off-by: Magnus Damm
Signed-off-by: Paul Mundt -
debugfs_create_file() returns NULL if an error occurs, returns -ENODEV
when debugfs is not enabled in the kernel.Signed-off-by: Zhao Lei
Signed-off-by: Paul Mundt
21 Sep, 2008
3 commits
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This implements a few trace points across events that are deemed
interesting. This implements a number of trace points:- The page fault handler / TLB miss
- IPC calls
- Kernel thread creationThe original LTTng patch had the slow-path instrumented, which
fails to account for the vast majority of events. In general
placing this in the fast-path is not a huge performance hit, as
we don't take page faults for kernel addresses.The other bits of interest are some of the other trap handlers, as
well as the syscall entry/exit (which is better off being handled
through the tracehook API). Most of the other trap handlers are corner
cases where alternate means of notification exist, so there is little
value in placing extra trace points in these locations.Based on top of the points provided both by the LTTng instrumentation
patch as well as the patch shipping in the ST-Linux tree, albeit in a
stripped down form.Signed-off-by: Paul Mundt
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We already have hooks in place in the __do_page_fault() fast-path,
so kill them off in the slow path.Signed-off-by: Paul Mundt
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Signed-off-by: Paul Mundt
20 Sep, 2008
1 commit
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This follows the powerpc commit f6a616800e68b61807d0f7bb0d5dc70665ef8046
'[POWERPC] Fix kernel stack allocation alignment'.SH has traditionally forced the thread order to be relative to the page
size, so there were never any situations where the same bug was
triggered by slub. Regardless, the usage of > 8kB stacks for the larger
page sizes is overkill, so we switch to using slab allocations there,
as per the powerpc change.Signed-off-by: Paul Mundt
17 Sep, 2008
1 commit
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Cleans up link numerous build issues with page migration and so on when
enabled on nommu builds.Signed-off-by: Paul Mundt
08 Sep, 2008
7 commits
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Signed-off-by: Paul Mundt
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This uses jump_to_uncached() which is now given the noinline attribute
due to the special section mapping. Kill off the inline attribute to
fix up compilation failure.Signed-off-by: Paul Mundt
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Because alloc_bootmem functions return the allocated memory always
zeroed, an additional call of memset on allocated memory is
unnecessary.Signed-off-by: Marek Skuczynski
Signed-off-by: Carl Shaw
Signed-off-by: Paul Mundt -
This fixes a problem in the code which copies the vmalloc portion of the
kernel's page table into the current user space page table. The addition
of the four level page table code breaks on folded page tables, because
the pud level is always present (although folded). This updates the code
to use the same style of updates for the pud as is used for the pgd
level.Signed-off-by: Stuart Menefy
Signed-off-by: Paul Mundt -
statically initialise the cached_to_uncached offset, so that we can use
it immediatly.Signed-off-by: Stuart Menefy
Signed-off-by: Paul Mundt -
Signed-off-by: Paul Mundt
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Signed-off-by: Paul Mundt
28 Aug, 2008
1 commit
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This patch kills a section mismatch for platform_resource_setup_memory().
Signed-off-by: Magnus Damm
Signed-off-by: Paul Mundt
11 Aug, 2008
2 commits
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Allow user to pass parameters on kernel command line to override
default size for physically contiguous memory buffers. The default
VPU buffer size is too small for VGA harware encoding, but instead
of just bumping up the number we allow the user to override the
default size using the command line. Supports SuperH Mobile hardware
blocks such as VEU, VPU and CEU.Signed-off-by: Magnus Damm
Signed-off-by: Paul Mundt -
Presently we oops in mm/hugetlb.c:1325, which is the order == 0 test in
hugetlb_add_hstate() called at initialization time. So, disable 64kB
huge pages when we're using a 64kB PAGE_SIZE. On most parts this will
force the default to be 1MB huge pages.Signed-off-by: Paul Mundt
04 Aug, 2008
2 commits
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Includes:
- SH2 (7619) Writeback support.
- SH2A cache handling fix.Signed-off-by: Yoshinori Sato
Signed-off-by: Paul Mundt -
These were completely unparseable, so fix them up.
Signed-off-by: Paul Mundt
02 Aug, 2008
1 commit
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* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (28 commits)
mm/hugetlb.c must #include
video: Fix up hp6xx driver build regressions.
sh: defconfig updates.
sh: Kill off stray mach-rsk7203 reference.
serial: sh-sci: Fix up SH7760/SH7780/SH7785 early printk regression.
sh: Move out individual boards without mach groups.
sh: Make sure AT_SYSINFO_EHDR is exposed to userspace in asm/auxvec.h.
sh: Allow SH-3 and SH-5 to use common headers.
sh: Provide common CPU headers, prune the SH-2 and SH-2A directories.
sh/maple: clean maple bus code
sh: More header path fixups for mach dir refactoring.
sh: Move out the solution engine headers to arch/sh/include/mach-se/
sh: I2C fix for AP325RXA and Migo-R
sh: Shuffle the board directories in to mach groups.
sh: dma-sh: Fix up dreamcast dma.h mach path.
sh: Switch KBUILD_DEFCONFIG to shx3_defconfig.
sh: Add ARCH_DEFCONFIG entries for sh and sh64.
sh: Fix compile error of Solution Engine
sh: Proper __put_user_asm() size mismatch fix.
sh: Stub in a dummy ENTRY_OFFSET for uImage offset calculation.
...
29 Jul, 2008
2 commits
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This follows the sparc changes a439fe51a1f8eb087c22dd24d69cebae4a3addac.
Most of the moving about was done with Sam's directions at:
http://marc.info/?l=linux-sh&m=121724823706062&w=2
with subsequent hacking and fixups entirely my fault.
Signed-off-by: Sam Ravnborg
Signed-off-by: Paul Mundt -
Conflicts:
arch/x86/Kconfig
Signed-off-by: Ingo Molnar
28 Jul, 2008
6 commits
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fix the problem that cannot boot using uImage when PAGE_SIZE is
8kbyte or 64kbyte.Signed-off-by: Yoshihiro Shimoda
Signed-off-by: Paul Mundt -
Commit 1ea0704e0da65b2b46f9142ff1391163aac24060
(mm: add a ptep_modify_prot transaction abstraction)
triggered on sh build errors like the following:...
CC arch/sh/mm/pg-sh4.o
cc1: warnings being treated as errors
include2/asm/pgtable.h:139: error: 'ptep_get_and_clear' declared inline after being called
include2/asm/pgtable.h:139: error: previous declaration of 'ptep_get_and_clear' was here
make[2]: *** [arch/sh/mm/pg-sh4.o] Error 1Since there's no good reason for marking these global functions as
"inline" this patch therefore removes the inline's.Signed-off-by: Adrian Bunk
Signed-off-by: Paul Mundt -
This patch adds physically contiguous memory chunks to the UIO devices.
The same strategy can be used in the future for the CEU as well.Signed-off-by: Magnus Damm
Signed-off-by: Paul Mundt -
Remove inline from ptep_get_and_clean() to match with header file prototype.
Makes linux-next build.Signed-off-by: Magnus Damm
Signed-off-by: Paul Mundt -
The current kernel behaviour is to reenable interrupts unconditionally
when taking a page fault. This patch changes this to only enable them
if interrupts were previously enabled.It also fixes a problem seen with this fix in place: the kernel previously
flushed the vsyscall page when handling a signal, which is not only
unncessary, but caused a possible sleep with interrupts disabled.Signed-off-by: Stuart Menefy
Signed-off-by: Paul Mundt -
Add implementation of flush_icache_range() suitable for signal handler
and kprobes. Remove flush_cache_sigtramp() and change signal.c to use
flush_icache_range().Signed-off-by: Chris Smith
Signed-off-by: Paul Mundt
