24 Jun, 2009
2 commits
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x86 throws away .discard section but no other archs do. Also,
.discard is not thrown away while linking modules. Make every arch
and module linking throw it away. This will be used to define dummy
variables for percpu declarations and definitions.This patch is based on Ivan Kokshaysky's alpha percpu patch.
[ Impact: always throw away everything in .discard ]
Signed-off-by: Tejun Heo
Cc: Ivan Kokshaysky
Cc: Richard Henderson
Cc: Russell King
Cc: Haavard Skinnemoen
Cc: Bryan Wu
Cc: Mikael Starvik
Cc: Jesper Nilsson
Cc: David Howells
Cc: Yoshinori Sato
Cc: Tony Luck
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Michal Simek
Cc: Ralf Baechle
Cc: Kyle McMartin
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Paul Mundt
Cc: David S. Miller
Cc: Jeff Dike
Cc: Chris Zankel
Cc: Rusty Russell
Cc: Ingo Molnar -
This patch makes most !CONFIG_HAVE_SETUP_PER_CPU_AREA archs use
dynamic percpu allocator. The first chunk is allocated using
embedding helper and 8k is reserved for modules. This ensures that
the new allocator behaves almost identically to the original allocator
as long as static percpu variables are concerned, so it shouldn't
introduce much breakage.s390 and alpha use custom SHIFT_PERCPU_PTR() to work around addressing
range limit the addressing model imposes. Unfortunately, this breaks
if the address is specified using a variable, so for now, the two
archs aren't converted.The following architectures are affected by this change.
* sh
* arm
* cris
* mips
* sparc(32)
* blackfin
* avr32
* parisc (broken, under investigation)
* m32r
* powerpc(32)As this change makes the dynamic allocator the default one,
CONFIG_HAVE_DYNAMIC_PER_CPU_AREA is replaced with its invert -
CONFIG_HAVE_LEGACY_PER_CPU_AREA, which is added to yet-to-be converted
archs. These archs implement their own setup_per_cpu_areas() and the
conversion is not trivial.* powerpc(64)
* sparc(64)
* ia64
* alpha
* s390Boot and batch alloc/free tests on x86_32 with debug code (x86_32
doesn't use default first chunk initialization). Compile tested on
sparc(32), powerpc(32), arm and alpha.Kyle McMartin reported that this change breaks parisc. The problem is
still under investigation and he is okay with pushing this patch
forward and fixing parisc later.[ Impact: use dynamic allocator for most archs w/o custom percpu setup ]
Signed-off-by: Tejun Heo
Acked-by: Rusty Russell
Acked-by: David S. Miller
Acked-by: Benjamin Herrenschmidt
Acked-by: Martin Schwidefsky
Reviewed-by: Christoph Lameter
Cc: Paul Mundt
Cc: Russell King
Cc: Mikael Starvik
Cc: Ralf Baechle
Cc: Bryan Wu
Cc: Kyle McMartin
Cc: Matthew Wilcox
Cc: Grant Grundler
Cc: Hirokazu Takata
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Heiko Carstens
Cc: Ingo Molnar
22 Jun, 2009
24 commits
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On extreme configuration (e.g. 32bit 32-way NUMA machine), lpage
percpu first chunk allocator can consume too much of vmalloc space.
Make it fall back to 4k allocator if the consumption goes over 20%.[ Impact: add sanity check for lpage percpu first chunk allocator ]
Signed-off-by: Tejun Heo
Reported-by: Jan Beulich
Cc: Andi Kleen
Cc: Ingo Molnar -
According to Andi, it isn't clear whether lpage allocator is worth the
trouble as there are many processors where PMD TLB is far scarcer than
PTE TLB. The advantage or disadvantage probably depends on the actual
size of percpu area and specific processor. As performance
degradation due to TLB pressure tends to be highly workload specific
and subtle, it is difficult to decide which way to go without more
data.This patch implements percpu_alloc kernel parameter to allow selecting
which first chunk allocator to use to ease debugging and testing.While at it, make sure all the failure paths report why something
failed to help determining why certain allocator isn't working. Also,
kill the "Great future plan" comment which had already been realized
quite some time ago.[ Impact: allow explicit percpu first chunk allocator selection ]
Signed-off-by: Tejun Heo
Reported-by: Jan Beulich
Cc: Andi Kleen
Cc: Ingo Molnar -
lpage allocator aliases a PMD page for each cpu and returns whatever
is unused to the page allocator. When the pageattr of the recycled
pages are changed, this makes the two aliases point to the overlapping
regions with different attributes which isn't allowed and known to
cause subtle data corruption in certain cases.This can be handled in simliar manner to the x86_64 highmap alias.
pageattr code should detect if the target pages have PMD alias and
split the PMD alias and synchronize the attributes.pcpur allocator is updated to keep the allocated PMD pages map sorted
in ascending address order and provide pcpu_lpage_remapped() function
which binary searches the array to determine whether the given address
is aliased and if so to which address. pageattr is updated to use
pcpu_lpage_remapped() to detect the PMD alias and split it up as
necessary from cpa_process_alias().Jan Beulich spotted the original problem and incorrect usage of vaddr
instead of laddr for lookup.With this, lpage percpu allocator should work correctly. Re-enable
it.[ Impact: fix subtle lpage pageattr bug and re-enable lpage ]
Signed-off-by: Tejun Heo
Reported-by: Jan Beulich
Cc: Andi Kleen
Cc: Ingo Molnar -
Reorganize cpa_process_alias() so that new alias condition can be
added easily.Jan Beulich spotted problem in the original cleanup thread which
incorrectly assumed the two existing conditions were mutially
exclusive.[ Impact: code reorganization ]
Signed-off-by: Tejun Heo
Cc: Jan Beulich
Cc: Andi Kleen
Cc: Ingo Molnar -
Make the following changes in preparation of coming pageattr updates.
* Define and use array of struct pcpul_ent instead of array of
pointers. The only difference is ->cpu field which is set but
unused yet.* Rename variables according to the above change.
* Rename local variable vm to pcpul_vm and move it out of the
function.[ Impact: no functional difference ]
Signed-off-by: Tejun Heo
Cc: Jan Beulich
Cc: Andi Kleen
Cc: Ingo Molnar -
The "remap" allocator remaps large pages to build the first chunk;
however, the name isn't very good because 4k allocator remaps too and
the whole point of the remap allocator is using large page mapping.
The allocator will be generalized and exported outside of x86, rename
it to lpage before that happens.percpu_alloc kernel parameter is updated to accept both "remap" and
"lpage" for lpage allocator.[ Impact: code cleanup, kernel parameter argument updated ]
Signed-off-by: Tejun Heo
Cc: Ingo Molnar -
In the failure path, setup_pcpu_remap() tries to free the area which
has already been freed to make holes in the large page. Fix it.[ Impact: fix duplicate free in failure path ]
Signed-off-by: Tejun Heo
Cc: Ingo Molnar -
In pcpu_unmap(), flushing virtual cache on vunmap can't be delayed as
the page is going to be returned to the page allocator. Only TLB
flushing can be put off such that vmalloc code can handle it lazily.
Fix it.[ Impact: fix subtle virtual cache flush bug ]
Signed-off-by: Tejun Heo
Cc: Nick Piggin
Cc: Ingo Molnar -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
sdhci: remove needless double parenthesis
sdhci: Specific quirk vor VIA SDHCI controller in VX855ES
s3cmci: fix dma configuration call
mmc: Add new via-sdmmc host controller driver
sdhci: Add support for hosts that are only capable of 1-bit transfers
MAINTAINERS: add myself as atmel-mci maintainer (sd/mmc interface)
sdhci: Add SDHCI_QUIRK_NO_MULTIBLOCK quirk
sdhci: Add better ADMA error reporting
sdhci-s3c: Samsung S3C based SDHCI controller glue -
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: aes-ni - Remove CRYPTO_TFM_REQ_MAY_SLEEP from fpu template
crypto: aes-ni - Do not sleep when using the FPU
crypto: aes-ni - Fix cbc mode IV saving
crypto: padlock-aes - work around Nano CPU errata in CBC mode
crypto: padlock-aes - work around Nano CPU errata in ECB mode -
…/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
lockdep: Select frame pointers on x86
dma-debug: be more careful when building reference entries
dma-debug: check for sg_call_ents in best-fit algorithm too -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda - Add model=6530g option
ALSA: hda - Acer Inspire 6530G model for Realtek ALC888
ALSA: snd_usb_caiaq: fix legacy input streaming
ASoC: Kill BUS_ID_SIZE
ALSA: HDA - Correct trivial typos in comments.
ALSA: HDA - Name-fixes in code (tagra/targa)
ALSA: HDA - Add pci-quirk for MSI MS-7350 motherboard.
ALSA: hda - Fix memory leak at codec creation -
This allows the callers to now pass down the full set of FAULT_FLAG_xyz
flags to handle_mm_fault(). All callers have been (mechanically)
converted to the new calling convention, there's almost certainly room
for architectures to clean up their code and then add FAULT_FLAG_RETRY
when that support is added.Signed-off-by: Linus Torvalds
-
The fault handling routines really want more fine-grained flags than a
single "was it a write fault" boolean - the callers will want to set
flags like "you can return a retry error" etc.And that's actually how the VM works internally, but right now the
top-level fault handling functions in mm/memory.c all pass just the
'write_access' boolean around.This switches them over to pass around the FAULT_FLAG_xyzzy 'flags'
variable instead. The 'write_access' calling convention still exists
for the exported 'handle_mm_fault()' function, but that is next.Signed-off-by: Linus Torvalds
-
31a985f "ipc: use __ARCH_WANT_IPC_PARSE_VERSION in ipc/util.h" would
choose the implementation of ipc_parse_version() based on a symbol
defined in .But it failed to also include this header and thus broke
IPC_64-passing 32-bit userspace because the flag wasn't masked out
properly anymore and the command not understood.Include to give the architecture a chance to ask for
the no-no-op ipc_parse_version().Signed-off-by: Johannes Weiner
Acked-by: Arnd Bergmann
Signed-off-by: Linus Torvalds -
Signed-off-by: Pierre Ossman
-
The SDHCI controller found in the VX855ES requires 10ms
delay between applying power and applying clock.This issue has been discovered and documented by the OLPC XO1.5 team.
Signed-off-by: Harald Welte
Signed-off-by: Pierre Ossman -
This was missed in the DMA changes during the s3c24xx
updates in commit 8970ef47d56fd3db28ee798b9d400caf08abd924.Signed-off-by: Ben Dooks
Signed-off-by: Pierre Ossman -
This adds the via-sdmmc driver for the SD/MMC-controller of VIA,
which is found in a number of recent integrated VIA chipset
products.Signed-off-by: Harald Welte
Signed-off-by: Pierre Ossman -
Some hosts (hardware configurations, or particular SD/MMC slots) may
not support 4-bit bus. For example, on MPC8569E-MDS boards we can
switch between serial (1-bit only) and nibble (4-bit) modes, thought
we have to disable more peripherals to work in 4-bit mode.Along with some small core changes, this patch modifies sdhci-of
driver, so that now it looks for "sdhci,1-bit-only" property in the
device-tree, and if specified we enable a proper quirk.Signed-off-by: Anton Vorontsov
Acked-by: Grant Likely
Signed-off-by: Pierre Ossman -
Add MAINTAINERS entry for atmel-mci driver.
This driver was maintained by its author: Haavard Skinnemoen. I take the
maintainance of it.Signed-off-by: Nicolas Ferre
Acked-by: Haavard Skinnemoen
Signed-off-by: Pierre Ossman -
Add quirk to show the controller cannot do multi-block IO.
This is mainly for the Samsung SDHCI controller that currently
cannot manage to do multi-block PIO without timing out.Signed-off-by: Ben Dooks
Signed-off-by: Pierre Ossman -
Update the ADMA error reporting to not only show the
overall controller state but also to print the ADMA
descriptor list.Signed-off-by: Ben Dooks
Signed-off-by: Pierre Ossman -
Add support for the 'HSMMC' block(s) in the Samsung SoC
line. These are compatible with the SDHCI driver so add
the necessary setup and driver binding for the platform
devices.Signed-off-by: Ben Dooks
Signed-off-by: Pierre Ossman
21 Jun, 2009
14 commits
-
* topic/hda:
ALSA: hda - Add model=6530g option
ALSA: hda - Acer Inspire 6530G model for Realtek ALC888
ALSA: HDA - Correct trivial typos in comments.
ALSA: HDA - Name-fixes in code (tagra/targa)
ALSA: HDA - Add pci-quirk for MSI MS-7350 motherboard.
ALSA: hda - Fix memory leak at codec creation -
* topic/caiaq:
ALSA: snd_usb_caiaq: fix legacy input streaming -
* topic/asoc:
ASoC: Kill BUS_ID_SIZE -
Add the new model string corresponding to the previous Acer Aspire
6530G support.Signed-off-by: Takashi Iwai
-
The selected 4930G model seemed to keep the subwoofer 'tuba'
function from operating correctly. Removing the existing PCI
ID match made this work again, but it was mapped to 'Side'
instead of to LFE as one would expect.
This attempts to enable all functionality and keep the amount
of available mixer sliders low. Any slider that had no audible
effect on the output audio has been removed, and as such EAPD
is not currently enabled.Signed-off-by: Tony Vroon
Signed-off-by: Takashi Iwai -
x86 stack traces are a piece of crap without frame pointers, and its not
like the 'performance gain' of not having stack pointers matters when you
selected lockdep.Reported-by: Andrew Morton
LKML-Reference:
Cc:
Signed-off-by: Peter Zijlstra
Signed-off-by: Ingo Molnar -
da456f1 "page allocator: do not disable interrupts in free_page_mlock()" moved
the PG_mlocked clearing after the flag sanity checking which makes mlocked
pages always trigger 'bad page'. Fix this by clearing the bit up front.Reported--and-debugged-by: Peter Chubb
Signed-off-by: Johannes Weiner
Acked-by: Mel Gorman
Tested-by: Maxim Levitsky
Signed-off-by: Linus Torvalds -
The discussion about using "access_ok()" in get_user_pages_fast() (see
commit 7f8189068726492950bf1a2dcfd9b51314560abf: "x86: don't use
'access_ok()' as a range check in get_user_pages_fast()" for details and
end result), made us notice that x86-64 was really being very sloppy
about virtual address checking.So be way more careful and straightforward about masking x86-64 virtual
addresses:- All the VIRTUAL_MASK* variants now cover half of the address
space, it's not like we can use the full mask on a signed
integer, and the larger mask just invites mistakes when
applying it to either half of the 48-bit address space.- /proc/kcore's kc_offset_to_vaddr() becomes a lot more
obvious when it transforms a file offset into a
(kernel-half) virtual address.- Unify/simplify the 32-bit and 64-bit USER_DS definition to
be based on TASK_SIZE_MAX.This cleanup and more careful/obvious user virtual address checking also
uncovered a buglet in the x86-64 implementation of strnlen_user(): it
would do an "access_ok()" check on the whole potential area, even if the
string itself was much shorter, and thus return an error even for valid
strings. Our sloppy checking had hidden this.So this fixes 'strnlen_user()' to do this properly, the same way we
already handled user strings in 'strncpy_from_user()'. Namely by just
checking the first byte, and then relying on fault handling for the
rest. That always works, since we impose a guard page that cannot be
mapped at the end of the user space address space (and even if we
didn't, we'd have the address space hole).Acked-by: Ingo Molnar
Cc: Peter Zijlstra
Cc: Andrew Morton
Cc: Nick Piggin
Cc: Hugh Dickins
Cc: H. Peter Anvin
Cc: Thomas Gleixner
Cc: Alan Cox
Signed-off-by: Linus Torvalds -
…git/tip/linux-2.6-tip
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
genirq, irq.h: Fix kernel-doc warnings
genirq: fix comment to say IRQ_WAKE_THREAD -
…x/kernel/git/tip/linux-2.6-tip
* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (49 commits)
perfcounter: Handle some IO return values
perf_counter: Push perf_sample_data through the swcounter code
perf_counter tools: Define and use our own u64, s64 etc. definitions
perf_counter: Close race in perf_lock_task_context()
perf_counter, x86: Improve interactions with fast-gup
perf_counter: Simplify and fix task migration counting
perf_counter tools: Add a data file header
perf_counter: Update userspace callchain sampling uses
perf_counter: Make callchain samples extensible
perf report: Filter to parent set by default
perf_counter tools: Handle lost events
perf_counter: Add event overlow handling
fs: Provide empty .set_page_dirty() aop for anon inodes
perf_counter: tools: Makefile tweaks for 64-bit powerpc
perf_counter: powerpc: Add processor back-end for MPC7450 family
perf_counter: powerpc: Make powerpc perf_counter code safe for 32-bit kernels
perf_counter: powerpc: Change how processor-specific back-ends get selected
perf_counter: powerpc: Use unsigned long for register and constraint values
perf_counter: powerpc: Enable use of software counters on 32-bit powerpc
perf_counter tools: Add and use isprint()
... -
…l/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Fix out of scope variable access in sched_slice()
sched: Hide runqueues from direct refer at source code level
sched: Remove unneeded __ref tag
sched, x86: Fix cpufreq + sched_clock() TSC scaling -
…nel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (24 commits)
tracing/urgent: warn in case of ftrace_start_up inbalance
tracing/urgent: fix unbalanced ftrace_start_up
function-graph: add stack frame test
function-graph: disable when both x86_32 and optimize for size are configured
ring-buffer: have benchmark test print to trace buffer
ring-buffer: do not grab locks in nmi
ring-buffer: add locks around rb_per_cpu_empty
ring-buffer: check for less than two in size allocation
ring-buffer: remove useless compile check for buffer_page size
ring-buffer: remove useless warn on check
ring-buffer: use BUF_PAGE_HDR_SIZE in calculating index
tracing: update sample event documentation
tracing/filters: fix race between filter setting and module unload
tracing/filters: free filter_string in destroy_preds()
ring-buffer: use commit counters for commit pointer accounting
ring-buffer: remove unused variable
ring-buffer: have benchmark test handle discarded events
ring-buffer: prevent adding write in discarded area
tracing/filters: strloc should be unsigned short
tracing/filters: operand can be negative
...Fix up kmemcheck-induced conflict in kernel/trace/ring_buffer.c manually
-
…el/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
NOHZ: Properly feed cpufreq ondemand governor -
…git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (45 commits)
x86, mce: fix error path in mce_create_device()
x86: use zalloc_cpumask_var for mce_dev_initialized
x86: fix duplicated sysfs attribute
x86: de-assembler-ize asm/desc.h
i386: fix/simplify espfix stack switching, move it into assembly
i386: fix return to 16-bit stack from NMI handler
x86, ioapic: Don't call disconnect_bsp_APIC if no APIC present
x86: Remove duplicated #include's
x86: msr.h linux/types.h is only required for __KERNEL__
x86: nmi: Add Intel processor 0x6f4 to NMI perfctr1 workaround
x86, mce: mce_intel.c needs <asm/apic.h>
x86: apic/io_apic.c: dmar_msi_type should be static
x86, io_apic.c: Work around compiler warning
x86: mce: Don't touch THERMAL_APIC_VECTOR if no active APIC present
x86: mce: Handle banks == 0 case in K7 quirk
x86, boot: use .code16gcc instead of .code16
x86: correct the conversion of EFI memory types
x86: cap iomem_resource to addressable physical memory
x86, mce: rename _64.c files which are no longer 64-bit-specific
x86, mce: mce.h cleanup
...Manually fix up trivial conflict in arch/x86/mm/fault.c
