07 Feb, 2011
1 commit
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Spinlocks on shared processor partitions use H_YIELD to notify the
hypervisor we are waiting on another virtual CPU. Unfortunately this means
the hcall tracepoints can recurse.The patch below adds a percpu depth and checks it on both the entry and
exit hcall tracepoints.Signed-off-by: Anton Blanchard
Acked-by: Steven Rostedt
Signed-off-by: Benjamin Herrenschmidt
CC: stable@kernel.org
22 Jan, 2011
2 commits
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* 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6:
powerpc/83xx: fix build failures on dt compatible list. -
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (34 commits)
powerpc/mpic: Fix mask/unmask timeout message
powerpc/pseries: Add BNX2=m to defconfig
powerpc: Enable 64kB pages and 1024 threads in pseries config
powerpc: Disable mcount tracers in pseries defconfig
powerpc/boot/dts: Install dts from the right directory
powerpc: machine_check_generic is wrong on 64bit
powerpc: Check RTAS extended log flag before checking length
powerpc: Fix corruption when grabbing FWNMI data
powerpc: Rework pseries machine check handler
powerpc: Don't silently handle machine checks from userspace
powerpc: Remove duplicate debugger hook in machine_check_exception
powerpc: Never halt RTAS error logging after receiving an unrecoverable machine check
powerpc: Don't force MSR_RI in machine_check_exception
powerpc: Print 32 bits of DSISR in show_regs
powerpc/kdump: Disable ftrace during kexec
powerpc/kdump: Move crash_kexec_stop_spus to kdump crash handler
powerpc/kexec: Remove empty ppc_md.machine_kexec_prepare
powerpc/kexec: Don't initialise kexec hooks to default handlers
powerpc/kdump: Remove ppc_md.machine_crash_shutdown
powerpc/kexec: Remove ppc_md.machine_kexec
...
21 Jan, 2011
11 commits
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The FWNMI code uses a global buffer without any locks to read the RTAS error
information. If two CPUs take a machine check at once then we will corrupt
this buffer.Since most FWNMI rtas messages are not of the extended type, we can create a
64bit percpu buffer and use it where possible. If we do receive an extended
RTAS log then we fall back to the old behaviour of using the global buffer.Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt -
Rework pseries machine check handler:
- If MSR_RI isn't set, we cannot recover even if the machine check was fully
recovered- Rename nonfatal to recovered
- Handle RTAS_DISP_LIMITED_RECOVERY
- Use BUS_MCEERR_AR instead of BUS_ADRERR
- Don't check all the RTAS error log fields when receiving a synchronous
machine check. Recent versions of the pseries firmware do not fill them
in during a machine check and instead send a follow up error log with
the detailed information. If we see a synchronous machine check, and we
came from userspace then kill the task.Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt -
Newer versions of the System p firwmare send a partial RTAS error log in the
machine check handler with a more detailed response appearing sometime later
via check event.This means at machine check time we do not have enough information to
ascertain exactly what went on. Furthermore, I have found the RTAS error
logs in the machine check handler contain no useful information, so halting on
them makes little sense. If we want to halt it would make more sense to do
it following the error log received sometime later via check event.In light of this, never halt the error log in the pseries machine
check handler.Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt -
Use the crash handler hooks to run the SPU stop code, just like we do for
ehea and cell RAS code.While I'm here I noticed "CPUSs reliabally"
so fix the spelling MISTAKESs reliabally.
Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt -
We check for a valid handler before calling ppc_md.machine_kexec_prepare
so we can just remove these empty handlers.Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt -
There's no need to initialise ppc_md.machine_kexec and
ppc_md.machine_kexec_prepare to the default handlers.Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt -
No one uses ppc_md.machine_crash_shutdown, so remove it.
Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt -
With cmwq, there's no reason to use a separate workqueue in
cpufreq_spudemand. Use system_wq instead. The work items are already
sync canceled on stop, so it's already guaranteed that no work is
running when spu_gov_exit() is entered.Signed-off-by: Tejun Heo
Cc: Arnd Bergmann
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Dave Jones
Cc: cpufreq@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt -
Simplify several write fileoperations for spufs by using
simple_write_to_buffer().Signed-off-by: Akinobu Mita
Acked-by: Arnd Bergmann
Signed-off-by: Benjamin Herrenschmidt -
The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel. A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.Reviewed-by: Ingo Molnar
Acked-by: David Woodhouse
Signed-off-by: David Rientjes
Cc: Greg KH
Cc: "David S. Miller"
Cc: Jens Axboe
Cc: Arnd Bergmann
Cc: Robin Holt
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Jan, 2011
1 commit
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Commit a4f740cf, "of/flattree: Add of_flat_dt_match() helper function"
introduced build failures in arch/powerpc/platform/83xx by mistyping
'static' as 'struct' in the compatible string list, and omitting a few
semicolons. This patch fixes it.Reported-by: Stephen Rothwell
Signed-off-by: Grant Likely
14 Jan, 2011
1 commit
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* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits)
Documentation/trace/events.txt: Remove obsolete sched_signal_send.
writeback: fix global_dirty_limits comment runtime -> real-time
ppc: fix comment typo singal -> signal
drivers: fix comment typo diable -> disable.
m68k: fix comment typo diable -> disable.
wireless: comment typo fix diable -> disable.
media: comment typo fix diable -> disable.
remove doc for obsolete dynamic-printk kernel-parameter
remove extraneous 'is' from Documentation/iostats.txt
Fix spelling milisec -> ms in snd_ps3 module parameter description
Fix spelling mistakes in comments
Revert conflicting V4L changes
i7core_edac: fix typos in comments
mm/rmap.c: fix comment
sound, ca0106: Fix assignment to 'channel'.
hrtimer: fix a typo in comment
init/Kconfig: fix typo
anon_inodes: fix wrong function name in comment
fix comment typos concerning "consistent"
poll: fix a typo in comment
...Fix up trivial conflicts in:
- drivers/net/wireless/iwlwifi/iwl-core.c (moved to iwl-legacy.c)
- fs/ext4/ext4.hAlso fix missed 'diabled' typo in drivers/net/bnx2x/bnx2x.h while at it.
13 Jan, 2011
1 commit
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MPC8308 has ULPI pin muxing settings in SICRH register, bits 17-18
which is different from both MPC8313 and MPC8315.
Also MPC8308 doesn't have REFSEL, UTMI_PHY_EN and OTG_PORT fields
in the USB DR controller CONTROL register.Signed-off-by: Ilya Yanok
Tested-by: Wolfgang Denk
Acked-by: Wolfgang Denk
Signed-off-by: Kumar Gala
12 Jan, 2011
1 commit
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* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (72 commits)
powerpc/pseries: Fix build of topology stuff without CONFIG_NUMA
powerpc/pseries: Fix VPHN build errors on non-SMP systems
powerpc/83xx: add mpc8308_p1m DMA controller device-tree node
powerpc/83xx: add DMA controller to mpc8308 device-tree node
powerpc/512x: try to free dma descriptors in case of allocation failure
powerpc/512x: add MPC8308 dma support
powerpc/512x: fix the hanged dma transfer issue
powerpc/512x: scatter/gather dma fix
powerpc/powermac: Make auto-loading of therm_pm72 possible
of/address: Use propper endianess in get_flags
powerpc/pci: Use printf extension %pR for struct resource
powerpc: Remove unnecessary casts of void ptr
powerpc: Disable VPHN polling during a suspend operation
powerpc/pseries: Poll VPA for topology changes and update NUMA maps
powerpc: iommu: Add device name to iommu error printks
powerpc: Record vma->phys_addr in ioremap()
powerpc: Update compat_arch_ptrace
powerpc: Fix PPC_PTRACE_SETHWDEBUG on PPC_BOOK3S
powerpc/time: printk time stamp init not correct
powerpc: Minor cleanups for machdep.h
...
11 Jan, 2011
3 commits
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* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (29 commits)
of/flattree: forward declare struct device_node in of_fdt.h
ipmi: explicitly include of_address.h and of_irq.h
sparc: explicitly cast negative phandle checks to s32
powerpc/405: Fix missing #{address,size}-cells in i2c node
powerpc/5200: dts: refactor dts files
powerpc/5200: dts: Change combatible strings on localbus
powerpc/5200: dts: remove unused properties
powerpc/5200: dts: rename nodes to prepare for refactoring dts files
of/flattree: Update dtc to current mainline.
of/device: Don't register disabled devices
powerpc/dts: fix syntax bugs in bluestone.dts
of: Fixes for OF probing on little endian systems
of: make drivers depend on CONFIG_OF instead of CONFIG_PPC_OF
of/flattree: Add of_flat_dt_match() helper function
of_serial: explicitly include of_irq.h
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree
of/flattree: Reorder unflatten_dt_node
of/flattree: Refactor unflatten_dt_node
of/flattree: Add non-boottime device tree functions
of/flattree: Add Kconfig for EARLY_FLATTREE
...Fix up trivial conflict in arch/sparc/prom/tree_32.c as per Grant.
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Remove kobject.h from files which don't need it, notably,
sched.h and fs.h.Signed-off-by: Alexey Dobriyan
Signed-off-by: Linus Torvalds
07 Jan, 2011
5 commits
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RCU free the struct inode. This will allow:
- Subsequent store-free path walking patch. The inode must be consulted for
permissions when walking, so an RCU inode reference is a must.
- sb_inode_list_lock to be moved inside i_lock because sb list walkers who want
to take i_lock no longer need to take sb_inode_list_lock to walk the list in
the first place. This will simplify and optimize locking.
- Could remove some nested trylock loops in dcache code
- Could potentially simplify things a bit in VM land. Do not need to take the
page lock to follow page->mapping.The downsides of this is the performance cost of using RCU. In a simple
creat/unlink microbenchmark, performance drops by about 10% due to inability to
reuse cache-hot slab objects. As iterations increase and RCU freeing starts
kicking over, this increases to about 20%.In cases where inode lifetimes are longer (ie. many inodes may be allocated
during the average life span of a single inode), a lot of this cache reuse is
not applicable, so the regression caused by this patch is smaller.The cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU,
however this adds some complexity to list walking and store-free path walking,
so I prefer to implement this at a later date, if it is shown to be a win in
real situations. I haven't found a regression in any non-micro benchmark so I
doubt it will be a problem.Signed-off-by: Nick Piggin
-
dget_locked was a shortcut to avoid the lazy lru manipulation when we already
held dcache_lock (lru manipulation was relatively cheap at that point).
However, how that the lru lock is an innermost one, we never hold it at any
caller, so the lock cost can now be avoided. We already have well working lazy
dcache LRU, so it should be fine to defer LRU manipulations to scan time.Signed-off-by: Nick Piggin
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dcache_lock no longer protects anything. remove it.
Signed-off-by: Nick Piggin
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Protect d_unhashed(dentry) condition with d_lock. This means keeping
DCACHE_UNHASHED bit in synch with hash manipulations.Signed-off-by: Nick Piggin
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Make d_count non-atomic and protect it with d_lock. This allows us to ensure a
0 refcount dentry remains 0 without dcache_lock. It is also fairly natural when
we start protecting many other dentry members with d_lock.Signed-off-by: Nick Piggin
03 Jan, 2011
1 commit
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The patches below fixes a typo "singal" to "signal".
Signed-off-by: Justin P. Mattock
Signed-off-by: Jiri Kosina
02 Jan, 2011
1 commit
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This patch adds of_flat_dt_match() which tests a node for
compatibility with a list of values and converts the relevant powerpc
platform code to use it. This approach simplifies the board support
code a bit.Signed-off-by: Grant Likely
Reviewed-by: Stephen Neuendorffer
30 Dec, 2010
1 commit
24 Dec, 2010
1 commit
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Fix build errors like these (from a randconfig and my defconfig for a custom board):
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:549: error: dereferencing pointer to incomplete type: 1 errors in 1 logs
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:636: error: implicit declaration of function 'nonseekable_open': 1 errors in 1 logs
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:657: error: variable 'mpc52xx_wdt_fops' has initializer but incomplete type: 1 errors in 1 logs
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:658: error: excess elements in struct initializer: 1 errors in 1 logs
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:658: error: unknown field 'owner' specified in initializer: 1 errors in 1 logs
...Reported-by: Geert Uytterhoeven
Signed-off-by: Wolfram Sang
Cc: Grant Likely
Cc: Benjamin Herrenschmidt
Cc: Andrew Morton
Signed-off-by: Grant Likely
23 Dec, 2010
1 commit
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Conflicts:
MAINTAINERS
arch/arm/mach-omap2/pm24xx.c
drivers/scsi/bfa/bfa_fcpim.cNeeded to update to apply fixes for which the old branch was too
outdated.
09 Dec, 2010
7 commits
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The therm_pm72 driver, used on the PowerMac G5 range, cannot be
auto-loaded, since the driver itself creates both the device node
and the driver instance.Moving the device node creation to the platform setup code and
adding the necessary MODULE_DEVICE_TABLE() information allows the
driver to be automatically loaded by udev on any semi-modern
distribution.It "fixes" a major source of problem on G5 machines where the
driver wasn't explicitely loaded by default, and the system
would automatically shutdown under load.Tested on an Xserve G5.
Signed-off-by: Marc Zyngier
Cc: Benjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt -
iommu_table_setparms_lpar needs either the phb or the subbusnumber
(not both), pass the phb to make it similar to iommu_table_setparms.Note: In cases where a caller was passing bus->number previously to
iommu_table_setparms_lpar() rather than phb->bus->number, this can lead
to a different value in tbl->it_busno. The only example of this was the
removed pci_dma_dev_setup_pSeriesLP(), removed in "ppc/iommu: remove
unneeded pci_dma_dev_setup_pSeriesLP".[BenH: You updated only one of the two callers. Fixed that for you]
Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt -
The block in pci_dma_dev_setup_pSeriesLP for dma_window == NULL can be
removed because we will only teminate the loop if we had already allocated
a iommu table for that node or we found a window. While there may be
no window for the device, the intresting part is if we are reusing a
table or creating it for the first device under it.Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt -
The device tree root is never a pci bus, and will not have a
PCI_DN(pdn), so the check for PCI_DN added in
650f7b3b2f0ead0673e90452cf3dedde97c537ba makes the check for pdn->parent
redundant and it can be removed.Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt -
The iommu_table pointer in the pci auxiliary struct of device_node has
not been used by the iommu ops since the dma refactor of
12d04eef927bf61328af2c7cbe756c96f98ac3bf, however this code still uses
it to find tables for dlpar. By only setting the PCI_DN iommu_table
pointer on nodes with dma window properties, we will be able to quickly
find the node for later checks, and can remove the table without looking
for the the dma window property on dlpar remove.Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt
30 Nov, 2010
2 commits
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I'm not aware of any userspace tool accessing it by its name anyways,
it's read back by the kernel itself on the next boot to get back
older log entriesSigned-off-by: Benjamin Herrenschmidt
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The nvram log partition stuff currently in nvram_64.c is really
pseries specific. It isn't actually used on anything else (despite
the fact that we ran the code to setup the partition on anything
except powermac) and the log format is specific to pseries RTAS
implementation. So move it where it belongsSigned-off-by: Benjamin Herrenschmidt