Commit Graph

44177 Commits

Author SHA1 Message Date
Yoshinori Sato
d79b8741f2 sh: SH-2 defconfig updates.
This adds a new defconfig for SE7619 and updates SE7206.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:07 +09:00
Paul Mundt
cf00e20444 sh: Add uImage and S-rec generation support.
Add a couple of new targets, both for uImage and S-rec generation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:07 +09:00
Paul Mundt
fce3a24e70 sh: push-switch fixups for work_struct API damage.
INIT_WORK() dropped the data arg, so now we have to stash an extra
pointer and backpedal instead.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:07 +09:00
Paul Mundt
b482ad5dae sh: Shut up csum_ipv6_magic() warnings.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:07 +09:00
Paul Mundt
b9b382dabb sh: Reworked swap cache entry encoding for SH-X2 MMU.
In the 64-bit PTE case there's no point in restricting the encoding
to the low bits of the PTE, we can instead bump all of this up to
the high 32 bits and extend PTE_FILE_MAX_BITS to 32, adopting the
same convention used by x86 PAE.

There's a minor discrepency between the number of bits used for the
swap type encoding between 32 and 64-bit PTEs, but this is unlikely
to cause any problem given the extended offset.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:06 +09:00
Brice Goglin
e45116b8d7 [PATCH] Fix typo in 'EXPERIMENTAL' in CC_STACKPROTECTOR on x86_64
Fix typo in 'EXPERIMENTAL' in config CC_STACKPROTECTOR in arch/x86_64/Kconfig.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-11 12:29:27 -08:00
David Howells
022416967a [PATCH] LOG2: Make powerpc's __ilog2_u64() take a 64-bit argument
Make powerpc's __ilog2_u64() take a 64-bit argument.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-11 12:29:27 -08:00
Linus Torvalds
69de7fc037 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  AT91 MMC update for 2.6.19
  mmc: Change SDHCI iomem error to a warning
  mmc: fix "prev->state: 2 != TASK_RUNNING??" problem on SD/MMC  card removal
  AT91 MMC 5 : Minor cleanups
  AT91 MMC 4 : Interrupt handler cleanup
  AT91 MMC 3 : Move global mci_clk variable
  AT91 MMC 2 : Use platform resources
  AT91 MMC 1: Pass host structure.
2006-12-11 12:26:03 -08:00
Linus Torvalds
116140b7f5 Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  [PATCH] smc91x: Kill off excessive versatile hooks.
  [PATCH] myri10ge: update driver version to 1.1.0
  [PATCH] myri10ge: fix big_bytes in case of vlan frames
  [PATCH] myri10ge: Full vlan frame in small_bytes
  [PATCH] myri10ge: drop contiguous skb routines
  [PATCH] myri10ge: switch to page-based skb
  [PATCH] myri10ge: add page-based skb routines
  [PATCH] myri10ge: indentation cleanups
  [PATCH] chelsio: working NAPI
  [PATCH] MACB: Use __raw register access
  [PATCH] MACB: Use struct delayed_work instead of struct work_struct
  [PATCH] ucc_geth: Initialize mdio_lock.
  [PATCH] ucc_geth: compilation error fixes
2006-12-11 12:22:58 -08:00
Linus Torvalds
8d610dd52d Make sure we populate the initroot filesystem late enough
We should not initialize rootfs before all the core initializers have
run.  So do it as a separate stage just before starting the regular
driver initializers.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-11 12:12:04 -08:00
Linus Torvalds
8993780a6e Make SLES9 "get_kernel_version" work on the kernel binary again
As reported by Andy Whitcroft, at least the SLES9 initrd build process
depends on getting the kernel version from the kernel binary.  It does
that by simply trawling the binary and looking for the signature of the
"linux_banner" string (the string "Linux version " to be exact. Which
is really broken in itself, but whatever..)

That got broken when the string was changed to allow /proc/version to
change the UTS release information dynamically, and "get_kernel_version"
thus returned "%s" (see commit a2ee8649ba:
"[PATCH] Fix linux banner utsname information").

This just restores "linux_banner" as a static string, which should fix
the version finding.  And /proc/version simply uses a different string.

To avoid wasting even that miniscule amount of memory, the early boot
string should really be marked __initdata, but that just causes the same
bug in SLES9 to re-appear, since it will then find other occurrences of
"Linux version " first.

Cc: Andy Whitcroft <apw@shadowen.org>
Acked-by: Herbert Poetzl <herbert@13thfloor.at>
Cc: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Steve Fox <drfickle@us.ibm.com>
Acked-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-11 11:34:11 -08:00
Paul Mundt
8af905b4a4 [PATCH] smc91x: Kill off excessive versatile hooks.
This looks like a result of too many auto-merges. The
CONFIG_ARCH_VERSATILE case was handled a total of 6 times.
This kills 5 of them.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

--

 drivers/net/smc91x.h |   90 ---------------------------------------------------
 1 file changed, 90 deletions(-)
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:54:50 -05:00
Brice Goglin
5796df1982 [PATCH] myri10ge: update driver version to 1.1.0
Update driver version to 1.1.0.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:54:07 -05:00
Brice Goglin
13348beee5 [PATCH] myri10ge: fix big_bytes in case of vlan frames
Fix sizing of big_bytes in the case of vlan frames. The 4
VLAN_HLEN bytes were omitted, leading to sizing the big buffer
4 bytes smaller than it should be.  Due to how rx buffers are
carved from pages, this was harmless for the common (9000, 1500)
byte MTUs, but could lead to data corruption for some MTUs.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:54:06 -05:00
Brice Goglin
de3c450704 [PATCH] myri10ge: Full vlan frame in small_bytes
Receive full vlan frames into smalls when running with a jumbo MTU.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:54:06 -05:00
Brice Goglin
52ea6fb39b [PATCH] myri10ge: drop contiguous skb routines
Drop the old routines that used the physically contigous skb now
that we use the physical pages. And rename myri10ge_page_rx_done()
to myri10ge_rx_done() as it was previously.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:54:06 -05:00
Brice Goglin
c7dab99b08 [PATCH] myri10ge: switch to page-based skb
Switch to physical page skb, by calling the new page-based
allocation routines and using myri10ge_page_rx_done().

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:54:06 -05:00
Brice Goglin
dd50f3361f [PATCH] myri10ge: add page-based skb routines
Add physical page skb allocation routines and page based rx_done,
to be used by upcoming patches.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:54:06 -05:00
Brice Goglin
6250223e05 [PATCH] myri10ge: indentation cleanups
Indentation cleanups to synchronize to our tree which is automatically
indent'ed.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:54:06 -05:00
Stephen Hemminger
7fe26a60e0 [PATCH] chelsio: working NAPI
This driver tries to enable/disable NAPI at runtime, but
does so in an unsafe manner, and the NAPI interrupt handling is
a mess. Replace it with a compile time selected NAPI implementation.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:51:07 -05:00
Haavard Skinnemoen
0f0d84e52c [PATCH] MACB: Use __raw register access
Since macb is a chip-internal device, use __raw_readl and
__raw_writel instead of readl/writel. This will perform native-endian
accesses, which is the right thing to do on both AVR32 and ARM devices.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:31:28 -05:00
Haavard Skinnemoen
d836cae4f6 [PATCH] MACB: Use struct delayed_work instead of struct work_struct
The macb driver calls schedule_delayed_work() and friends, so we need
to use a struct delayed_work along with it. The conversion was
explained by David Howells on lkml Dec 5 2006:

http://lkml.org/lkml/2006/12/5/269

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:31:28 -05:00
Scott Wood
68dc44af63 [PATCH] ucc_geth: Initialize mdio_lock.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:31:28 -05:00
Scott Wood
1083cfe112 [PATCH] ucc_geth: compilation error fixes
Fix compilation failures when building the ucc_geth driver with spinlock
debugging.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-11 09:31:28 -05:00
Andrew Victor
99eeb8dfb1 AT91 MMC update for 2.6.19
The driver is usable on the newer SAM9 processors so replace all text
references to AT91RM9200 with just AT91.

The controller bug where all the words are byte-swapped is fixed on the
AT91SAM9 processors.  The byte-swapping work-around therefore only needs
to be done if cpu_is_at91rm9200().
[Original patch from Wojtek Kaniewski]

The AT91RM9200 and AT91SAM9260 processors support two MMC/SD slots - the
slot which is connected is now passed via the platform_data and the
correct slot selected in the AT91_MCI_SDCR register.

The driver should not be calling at91_set_gpio_output() since the VCC
pin should have already been configured as an output in the
processor/board setup code.  The driver should call
at91_set_gpio_value().

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-11 12:43:35 +01:00
Pierre Ossman
a98087cf81 mmc: Change SDHCI iomem error to a warning
Some controllers report an invalid iomem size, but seem to work
correctly anyway. Change our current error to just a warning and
hope it doesn't cause too much problems.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-11 09:48:42 +01:00
Vitaly Wool
7b30d281b9 mmc: fix "prev->state: 2 != TASK_RUNNING??" problem on SD/MMC card removal
Currently on SD/MMC card removal the system exhibits the following message (the platform is ARM Versatile):

    prev->state: 2 != TASK_RUNNING??
    mmcqd/762[CPU#0]: BUG in __schedule at linux-2.6/kernel/sched.c:3826

(akpm: someone tried to fix this, but it's still wrong)

Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-11 09:48:16 +01:00
Andrew Victor
f3a8efa90b AT91 MMC 5 : Minor cleanups
A number of small cleanups to the AT91RM9200 MMC driver:
 - fix warnings generated by pr_debug().
 - prepend "AT91 MMC:" to printk() messages.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-11 09:47:21 +01:00
Andrew Victor
df05a303e3 AT91 MMC 4 : Interrupt handler cleanup
This patch simplifies the AT91RM9200 MMC interrupt handler code so that
it doesn't re-read the Interrupt Status and Interrupt Mask registers
multiple times.

Also defined AT91_MCI_ERRORS instead of using the hard-coded 0xffff0000.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-11 09:47:12 +01:00
Andrew Victor
3dd3b039d4 AT91 MMC 3 : Move global mci_clk variable
Move the global 'mci_clk' variable into the local 'at91mci_host'
structure.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-11 09:47:02 +01:00
Andrew Victor
17ea0595f4 AT91 MMC 2 : Use platform resources
Use the I/O base-address and IRQ passed to the driver via the
platform_device resources instead of using hardcoded values.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-11 09:46:51 +01:00
Andrew Victor
e0b19b8365 AT91 MMC 1: Pass host structure.
The I/O base address is now stored in the 'at91mci_host' structure.  We
therefore have to pass this structure to at91_mci_read() and
at91_mci_write().

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-11 09:46:37 +01:00
Ralf Baechle
9202f32558 [MIPS] Export local_flush_data_cache_page for sake of IDE.
On a CPU with aliases the IDE core needs to flush caches in the special
IDE variants of insw, insl etc.  If IDE support is built as a module this
will only work if local_flush_data_cache_page happens is exported as a
module.

As per policy export local_flush_data_cache_page as GPL symbol only.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-12-10 21:52:11 +00:00
Ralf Baechle
f8bf35a914 [MIPS] Export pm_power_off
This is required for ipmi_poweroff.c to work as a module.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-12-10 21:52:11 +00:00
Ralf Baechle
ae32ffd65b [MIPS] Export csum_partial_copy_nocheck.
ibmtr.c and typhoon.c use it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-12-10 21:52:11 +00:00
Ralf Baechle
2d911e9a4e [MIPS] Move die and die_if_kernel() from system.h to ptrace.h
This eleminates the need to include ptrace.h into system.h and fixes a
harmless namespace conflict on the PC symbol in bpck.c.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-12-10 21:52:11 +00:00
Ralf Baechle
86384d5441 [MIPS] Discard .exit.text at linktime.
This fixes fairly unobvious breakage of various drivers.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-12-10 21:52:11 +00:00
Ralf Baechle
5b1d221e62 [MIPS] Fix build of several IDE drivers by providing pci_get_legacy_ide_irq
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-12-10 21:52:11 +00:00
Herbert Xu
3263263f70 [CRYPTO] dm-crypt: Select CRYPTO_CBC
As CBC is the default chaining method for cryptoloop, we should select
it from cryptoloop to ease the transition.  Spotted by Rene Herman.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 10:18:57 -08:00
Cal Peake
0258736a0a [PATCH] add MODULE_* attributes to bit reversal library
Add MODULE_* attributes to the new bit reversal library. Most notably
MODULE_LICENSE which prevents superfluous kernel tainting.

Signed-off-by: Cal Peake <cp@absolutedigital.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 10:07:52 -08:00
Linus Torvalds
edb16bec41 Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Fix several kprobes bugs.
  [SPARC64]: Update defconfig.
  [SPARC64]: dma remove extra brackets
  [SPARC{32,64}]: Propagate ptrace_traceme() return value.
  [SPARC64]: Replace kmalloc+memset with kzalloc
  [SPARC]: Check kzalloc() return value in SUN4D irq/iommu init.
  [SPARC]: Replace kmalloc+memset with kzalloc
  [SPARC64]: Run ctrl-alt-del action for sun4v powerdown request.
  [SPARC64]: Unaligned accesses to userspace are hard errors.
  [SPARC64]: Call do_mathemu on illegal instruction traps too.
  [SPARC64]: Update defconfig.
  [SPARC64]: Add irqtrace/stacktrace/lockdep support.
2006-12-10 10:00:00 -08:00
Linus Torvalds
bb7320d1d9 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb: (132 commits)
  V4L/DVB 4949b: Fix container_of pointer retreival
  V4L/DVB (4949a): Fix INIT_WORK
  V4L/DVB (4949): Cxusb: codingstyle cleanups
  V4L/DVB (4948): Cxusb: Convert tuner functions to use dvb_pll_attach
  V4L/DVB (4947): Cx88: trivial cleanups
  V4L/DVB (4946): Cx88: Move cx88_dvb_bus_ctrl out of the card-specific area
  V4L/DVB (4945): Cx88: consolidate cx22702_config structs
  V4L/DVB (4944): Cx88: Convert DViCO FusionHDTV Hybrid to use dvb_pll_attach
  V4L/DVB (4943): Cx88: cleanup dvb_pll_attach for lgdt3302 tuners
  V4L/DVB (4953): Usbvision minor fixes
  V4L/DVB (4951): Add version.h, since it is required for VIDIOC_QUERYCAP
  V4L/DVB (4940): Or51211: Changed SNR and signal strength calculations
  V4L/DVB (4939): Or51132: Changed SNR and signal strength reporting
  V4L/DVB (4938): Cx88: Convert lgdt3302 tuning function to use dvb_pll_attach
  V4L/DVB (4941): Remove LINUX_VERSION_CODE and fix identations
  V4L/DVB (4942): Whitespace cleanups
  V4L/DVB (4937): Usbvision cleanup and code reorganization
  V4L/DVB (4936): Make MT4049FM5 tuner to set FM Gain to Normal
  V4L/DVB (4935): Added the capability of selecting fm gain by tuner
  V4L/DVB (4934): Usbvision radio requires GainNormal at e register
  ...
2006-12-10 09:59:18 -08:00
Avi Kivity
6aa8b732ca [PATCH] kvm: userspace interface
web site: http://kvm.sourceforge.net

mailing list: kvm-devel@lists.sourceforge.net
  (http://lists.sourceforge.net/lists/listinfo/kvm-devel)

The following patchset adds a driver for Intel's hardware virtualization
extensions to the x86 architecture.  The driver adds a character device
(/dev/kvm) that exposes the virtualization capabilities to userspace.  Using
this driver, a process can run a virtual machine (a "guest") in a fully
virtualized PC containing its own virtual hard disks, network adapters, and
display.

Using this driver, one can start multiple virtual machines on a host.

Each virtual machine is a process on the host; a virtual cpu is a thread in
that process.  kill(1), nice(1), top(1) work as expected.  In effect, the
driver adds a third execution mode to the existing two: we now have kernel
mode, user mode, and guest mode.  Guest mode has its own address space mapping
guest physical memory (which is accessible to user mode by mmap()ing
/dev/kvm).  Guest mode has no access to any I/O devices; any such access is
intercepted and directed to user mode for emulation.

The driver supports i386 and x86_64 hosts and guests.  All combinations are
allowed except x86_64 guest on i386 host.  For i386 guests and hosts, both pae
and non-pae paging modes are supported.

SMP hosts and UP guests are supported.  At the moment only Intel
hardware is supported, but AMD virtualization support is being worked on.

Performance currently is non-stellar due to the naive implementation of the
mmu virtualization, which throws away most of the shadow page table entries
every context switch.  We plan to address this in two ways:

- cache shadow page tables across tlb flushes
- wait until AMD and Intel release processors with nested page tables

Currently a virtual desktop is responsive but consumes a lot of CPU.  Under
Windows I tried playing pinball and watching a few flash movies; with a recent
CPU one can hardly feel the virtualization.  Linux/X is slower, probably due
to X being in a separate process.

In addition to the driver, you need a slightly modified qemu to provide I/O
device emulation and the BIOS.

Caveats (akpm: might no longer be true):

- The Windows install currently bluescreens due to a problem with the
  virtual APIC.  We are working on a fix.  A temporary workaround is to
  use an existing image or install through qemu
- Windows 64-bit does not work.  That's also true for qemu, so it's
  probably a problem with the device model.

[bero@arklinux.org: build fix]
[simon.kagstrom@bth.se: build fix, other fixes]
[uril@qumranet.com: KVM: Expose interrupt bitmap]
[akpm@osdl.org: i386 build fix]
[mingo@elte.hu: i386 fixes]
[rdreier@cisco.com: add log levels to all printks]
[randy.dunlap@oracle.com: Fix sparse NULL and C99 struct init warnings]
[anthony@codemonkey.ws: KVM: AMD SVM: 32-bit host support]
Signed-off-by: Yaniv Kamay <yaniv@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Cc: Simon Kagstrom <simon.kagstrom@bth.se>
Cc: Bernhard Rosenkraenzer <bero@arklinux.org>
Signed-off-by: Uri Lublin <uril@qumranet.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 09:57:22 -08:00
Daniel Walker
f5f1a24a2c [PATCH] clocksource: small cleanup
Mostly changing alignment.  Just some general cleanup.

[akpm@osdl.org: build fix]
Signed-off-by: Daniel Walker <dwalker@mvista.com>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 09:57:22 -08:00
Daniel Walker
2b0137001d [PATCH] clocksource: add usage of CONFIG_SYSFS
Simply adds some ifdefs to remove clocksoure sysfs code when CONFIG_SYSFS
isn't turn on.

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 09:57:22 -08:00
Arjan van de Ven
2b2842146c [PATCH] user of the jiffies rounding patch: Slab
This patch introduces users of the round_jiffies() function in the slab code.

The slab code has a few "run every second" timers for background work; these
are obviously not timing critical as long as they happen roughly at the right
frequency.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 09:57:22 -08:00
Arjan van de Ven
44d306e150 [PATCH] user of the jiffies rounding code: JBD
This patch introduces a user: of the round_jiffies() function; the "5 second"
ext3/jbd wakeup.

While "every 5 seconds" doesn't sound as a problem, there can be many of these
(and these timers do add up over all the kernel).  The "5 second" wakeup isn't
really timing sensitive; in addition even with rounding it'll still happen
every 5 seconds (with the exception of the very first time, which is likely to
be rounded up to somewhere closer to 6 seconds)

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 09:57:22 -08:00
Arjan van de Ven
4c36a5dec2 [PATCH] round_jiffies infrastructure
Introduce a round_jiffies() function as well as a round_jiffies_relative()
function.  These functions round a jiffies value to the next whole second.
The primary purpose of this rounding is to cause all "we don't care exactly
when" timers to happen at the same jiffy.

This avoids multiple timers firing within the second for no real reason;
with dynamic ticks these extra timers cause wakeups from deep sleep CPU
sleep states and thus waste power.

The exact wakeup moment is skewed by the cpu number, to avoid all cpus from
waking up at the exact same time (and hitting the same lock/cachelines
there)

[akpm@osdl.org: fix variable type]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 09:57:22 -08:00
Vadim Lobanov
5466b456ed [PATCH] fdtable: Implement new pagesize-based fdtable allocator
This patch provides an improved fdtable allocation scheme, useful for
expanding fdtable file descriptor entries.  The main focus is on the fdarray,
as its memory usage grows 128 times faster than that of an fdset.

The allocation algorithm sizes the fdarray in such a way that its memory usage
increases in easy page-sized chunks. The overall algorithm expands the allowed
size in powers of two, in order to amortize the cost of invoking vmalloc() for
larger allocation sizes. Namely, the following sizes for the fdarray are
considered, and the smallest that accommodates the requested fd count is
chosen:

    pagesize / 4
    pagesize / 2
    pagesize      <- memory allocator switch point
    pagesize * 2
    pagesize * 4
    ...etc...

Unlike the current implementation, this allocation scheme does not require a
loop to compute the optimal fdarray size, and can be done in efficient
straightline code.

Furthermore, since the fdarray overflows the pagesize boundary long before any
of the fdsets do, it makes sense to optimize run-time by allocating both
fdsets in a single swoop.  Even together, they will still be, by far, smaller
than the fdarray.  The fdtable->open_fds is now used as the anchor for the
fdset memory allocation.

Signed-off-by: Vadim Lobanov <vlobanov@speakeasy.net>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 09:57:22 -08:00
Vadim Lobanov
4fd45812cb [PATCH] fdtable: Remove the free_files field
An fdtable can either be embedded inside a files_struct or standalone (after
being expanded).  When an fdtable is being discarded after all RCU references
to it have expired, we must either free it directly, in the standalone case,
or free the files_struct it is contained within, in the embedded case.

Currently the free_files field controls this behavior, but we can get rid of
it entirely, as all the necessary information is already recorded.  We can
distinguish embedded and standalone fdtables using max_fds, and if it is
embedded we can divine the relevant files_struct using container_of().

Signed-off-by: Vadim Lobanov <vlobanov@speakeasy.net>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-10 09:57:22 -08:00