29 Apr, 2008
6 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild:
kconfig: add named choice group
kconfig: fix choice dependency check
kconifg: 'select' considered less evil
dontdiff: ignore timeconst.h
dontdiff: add modules.order
kbuild: fix unportability in gen_initramfs_list.sh
kbuild: fix help output to show correct arch
kbuild: show defconfig subdirs in make help
kconfig: reversed borderlines in inputbox -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
slub: pack objects denser
slub: Calculate min_objects based on number of processors.
slub: Drop DEFAULT_MAX_ORDER / DEFAULT_MIN_OBJECTS
slub: Simplify any_slab_object checks
slub: Make the order configurable for each slab cache
slub: Drop fallback to page allocator method
slub: Fallback to minimal order during slab page allocation
slub: Update statistics handling for variable order slabs
slub: Add kmem_cache_order_objects struct
slub: for_each_object must be passed the number of objects in a slab
slub: Store max number of objects in the page struct.
slub: Dump list of objects not freed on kmem_cache_close()
slub: free_list() cleanup
slub: improve kmem_cache_destroy() error message
slob: fix bug - when slob allocates "struct kmem_cache", it does not force alignment. -
While select should be used with care, it is not actually evil.
Signed-off-by: Matthew Wilcox
Signed-off-by: Sam Ravnborg -
Ignore the autobuilt kernel/timeconst.h when
using diff on an built kernel tree.Signed-off-by: Ben Dooks
Signed-off-by: Sam Ravnborg -
Add modules.order to the list of files that
shoud be ignored when using diff on a built
kernel tree.Signed-off-by: Ben Dooks
Signed-off-by: Sam Ravnborg -
bitops source file was renamed, so fix docbook for that.
docproc: linux-2.6.25-git11/include/asm-x86/bitops_32.h: No such file or directorySigned-off-by: Randy Dunlap
Signed-off-by: Linus Torvalds
28 Apr, 2008
23 commits
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Normally utime(2) checks current process is owner of the file, or it
has CAP_FOWNER capability. But FAT filesystem doesn't have uid/gid as
on disk info, so normal check is too unflexible.With this option you can relax it.
Signed-off-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Improve write performance by preventing the delayed_list from dumping all its
stripes onto the handle_list in one shot. Delayed stripes are now further
delayed by being held on the 'hold_list'. The 'hold_list' is bypassed when:* a STRIPE_IO_STARTED stripe is found at the head of 'handle_list'
* 'handle_list' is empty and i/o is being done to satisfy full stripe-width
write requests
* 'bypass_count' is less than 'bypass_threshold'. By default the threshold
is 1, i.e. every other stripe handled is a preread stripe provided the
top two conditions are false.Benchmark data:
System: 2x Xeon 5150, 4x SATA, mem=1GB
Baseline: 2.6.24-rc7
Configuration: mdadm --create /dev/md0 /dev/sd[b-e] -n 4 -l 5 --assume-clean
Test1: dd if=/dev/zero of=/dev/md0 bs=1024k count=2048
* patched: +33% (stripe_cache_size = 256), +25% (stripe_cache_size = 512)Test2: tiobench --size 2048 --numruns 5 --block 4096 --block 131072 (XFS)
* patched: +13%
* patched + preread_bypass_threshold = 0: +37%Changes since v1:
* reduce bypass_threshold from (chunk_size / sectors_per_chunk) to (1) and
make it configurable. This defaults to fairness and modest performance
gains out of the box.
Changes since v2:
* [neilb@suse.de]: kill STRIPE_PRIO_HI and preread_needed as they are not
necessary, the important change was clearing STRIPE_DELAYED in
add_stripe_bio and this has been moved out to make_request for the hang
fix.
* [neilb@suse.de]: simplify get_priority_stripe
* [dan.j.williams@intel.com]: reset the bypass_count when ->hold_list is
sampled empty (+11%)
* [dan.j.williams@intel.com]: decrement the bypass_count at the detection
of stripes being naturally promoted off of hold_list +2%. Note, resetting
bypass_count instead of decrementing on these events yields +4% but that is
probably too aggressive.
Changes since v3:
* cosmetic fixupsTested-by: James W. Laferriere
Signed-off-by: Dan Williams
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add support for the 965G and 965GM graphic chipsets to the intelfb driver. I
have a notebook with an Intel Mobile GM965/GL960 Integrated Graphics
Controller and with the attached patch the framebuffer comes up. I have
tested it a bit with DirectFB to make sure it is working stable.I also have an Intel Mobile GM945 and I compared the results, the programming
interface of the 9xx series from Intel is mostly the same, so I think the
patch should add all the functionality which the 945GM has.Signed-off-by: Maik Broemme
Cc: Dave Airlie
Cc: Antonino Daplas
Cc: Geert Uytterhoeven
Cc: Krzysztof Halasa
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch splits metronomefb into the platform independent metronomefb and
the platform dependent am200epd.Signed-off-by: Jaya Kumar
Cc: "Antonino A. Daplas"
Cc: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The following features are supported:
plane 0 works as a regular frame buffer, can be accessed by /dev/fb0
plane 1 has two AOIs (area of interest), can be accessed by /dev/fb1 and /dev/fb2
plane 2 has two AOIs, can be accessed by /dev/fb3 and /dev/fb4
Special ioctls support AOIsAll /dev/fb* can be used as regular frame buffer devices, except hardware
change can only be made through /dev/fb0. Changing pixel clock has no effect
on other fbs.Limitation of usage of AOIs:
AOIs on the same plane can not be horizonally overlapped
AOIs have horizonal order, i.e. AOI0 should be always on top of AOI1
AOIs can not beyond phisical display area. Application should check AOI geometry
before changing physical resolution on /dev/fb0required command line parameters to preallocate memory for frame buffer diufb.
optional command line parameters to set modes and monitor
video=fslfb:[resolution][,bpp][,monitor]
Syntax:Resolution
xres x yres-bpp@refresh_rate, the -bpp and @refresh_rate are optional
eg, 1024x768, 1280x1024, 1280x1024-32, 1280x1024@60, 1280x1024-32@60, 1280x480-32@60Bpp
bpp=32, bpp=24, or bpp=16Monitor
monitor=0, monitor=1, monitor=2
0 is DVI
1 is Single link LVDS
2 is Double link LVDSNote: switching monitor is a board feather, not DIU feather. MPC8610HPCD has three
monitor ports to swtich to. MPC5121ADS doesn't have additional monitor port. So switching
monirot port for MPC5121ADS has no effect.If compiled as a module, it takes pamameters mode, bpp, monitor with the same syntax above.
Signed-off-by: York Sun
Signed-off-by: Timur Tabi
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: "Antonino A. Daplas"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
By default disable VT switch, but allow it to be overridden via the
'vt_switch' module arg.Signed-off-by: Andres Salomon
Cc: "Antonino A. Daplas"
Cc: Jordan Crouse
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Match other fb drivers (including gxfb). Also, document the current boot
arguments in Documentation/fb/lxfb.txt.Signed-off-by: Andres Salomon
Cc: "Antonino A. Daplas"
Cc: Jordan Crouse
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add names of drivers converted to "mode_option" parameter.
This is one step toward changing all fb drivers to have common "mode_option"
parameter.Signed-off-by: Krzysztof Helt
Cc: "Antonino A. Daplas"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Prior to suspend, we allocate and switch to a new VT; after suspend, we switch
back to the original VT. This can be slow, and is completely unnecessary if
the framebuffer we're using can restore video properly.This adds a hook that allows drivers to select whether or not to do this vt
switch, and changes the gxfb driver to call this hook. It also adds a module
param to gxfb to allow controlling of the vt switch (defaulting to no switch).(Note: I'm not convinced that console_sem is the best way to protect this, but
we should probably have some form of locking..)[akpm@linux-foundation.org: build fix]
Signed-off-by: Andres Salomon
Cc: Jordan Crouse
Cc: "Antonino A. Daplas"
Cc: Pavel Machek
Cc: "Rafael J. Wysocki"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use a command line option (vram) rather than hardcoding the vram size. LxFB
already does this; it's useful for machines that can't query the BIOS for fb
size. This patch originated from David Woodhouse, was modified by Jordan
Crouse, and was then modified further by me.This also adds some gxfb documentation in Documentation/fb.
Signed-off-by: Andres Salomon
Cc: Jordan Crouse
Cc: "Antonino A. Daplas"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce a gpio_is_valid() predicate; use it in gpiolib.
Signed-off-by: Guennadi Liakhovetski
[ use inline function; follow the gpio_* naming convention;
work without gpiolib; all programming interfaces need docs ]
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add the description of batch registration interfaces to
Documentation/kprobes.txt.Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Prasanna S Panchamukhi
Cc: Shaohua Li
Cc: David Miller
Cc: "Frank Ch. Eigler"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move sample source code to its own source file so that it can be used
easier and build-tested/check/maintained by anyone.(Makefile changes are in a separate patch for all of Documentation/.)
Signed-off-by: Randy Dunlap
Acked-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Now that we're using "preferred local" policy for system default, we need to
make this as fast as possible. Because of the variable size of the mempolicy
structure [based on size of nodemasks], the preferred_node may be in a
different cacheline from the mode. This can result in accessing an extra
cacheline in the normal case of system default policy. Suspect this is the
cause of an observed 2-3% slowdown in page fault testing relative to kernel
without this patch series.To alleviate this, use an internal mode flag, MPOL_F_LOCAL in the mempolicy
flags member which is guaranteed [?] to be in the same cacheline as the mode
itself.Verified that reworked mempolicy now performs slightly better on 25-rc8-mm1
for both anon and shmem segments with system default and vma [preferred local]
policy.Signed-off-by: Lee Schermerhorn
Cc: Christoph Lameter
Cc: David Rientjes
Cc: Mel Gorman
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently, when one specifies MPOL_DEFAULT via a NUMA memory policy API
[set_mempolicy(), mbind() and internal versions], the kernel simply installs a
NULL struct mempolicy pointer in the appropriate context: task policy, vma
policy, or shared policy. This causes any use of that policy to "fall back"
to the next most specific policy scope.The only use of MPOL_DEFAULT to mean "local allocation" is in the system
default policy. This requires extra checks/cases for MPOL_DEFAULT in many
mempolicy.c functions.There is another, "preferred" way to specify local allocation via the APIs.
That is using the MPOL_PREFERRED policy mode with an empty nodemask.
Internally, the empty nodemask gets converted to a preferred_node id of '-1'.
All internal usage of MPOL_PREFERRED will convert the '-1' to the id of the
node local to the cpu where the allocation occurs.System default policy, except during boot, is hard-coded to "local
allocation". By using the MPOL_PREFERRED mode with a negative value of
preferred node for system default policy, MPOL_DEFAULT will never occur in the
'policy' member of a struct mempolicy. Thus, we can remove all checks for
MPOL_DEFAULT when converting policy to a node id/zonelist in the allocation
paths.In slab_node() return local node id when policy pointer is NULL. No need to
set a pol value to take the switch default. Replace switch default with
BUG()--i.e., shouldn't happen.With this patch MPOL_DEFAULT is only used in the APIs, including internal
calls to do_set_mempolicy() and in the display of policy in
/proc//numa_maps. It always means "fall back" to the the next most
specific policy scope. This simplifies the description of memory policies
quite a bit, with no visible change in behavior.get_mempolicy() continues to return MPOL_DEFAULT and an empty nodemask when
the requested policy [task or vma/shared] is NULL. These are the values one
would supply via set_mempolicy() or mbind() to achieve that condition--default
behavior.This patch updates Documentation to reflect this change.
Signed-off-by: Lee Schermerhorn
Cc: Christoph Lameter
Cc: David Rientjes
Cc: Mel Gorman
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
After further discussion with Christoph Lameter, it has become clear that my
earlier attempts to clean up the mempolicy reference counting were a bit of
overkill in some areas, resulting in superflous ref/unref in what are usually
fast paths. In other areas, further inspection reveals that I botched the
unref for interleave policies.A separate patch, suitable for upstream/stable trees, fixes up the known
errors in the previous attempt to fix reference counting.This patch reworks the memory policy referencing counting and, one hopes,
simplifies the code. Maybe I'll get it right this time.See the update to the numa_memory_policy.txt document for a discussion of
memory policy reference counting that motivates this patch.Summary:
Lookup of mempolicy, based on (vma, address) need only add a reference for
shared policy, and we need only unref the policy when finished for shared
policies. So, this patch backs out all of the unneeded extra reference
counting added by my previous attempt. It then unrefs only shared policies
when we're finished with them, using the mpol_cond_put() [conditional put]
helper function introduced by this patch.Note that shmem_swapin() calls read_swap_cache_async() with a dummy vma
containing just the policy. read_swap_cache_async() can call alloc_page_vma()
multiple times, so we can't let alloc_page_vma() unref the shared policy in
this case. To avoid this, we make a copy of any non-null shared policy and
remove the MPOL_F_SHARED flag from the copy. This copy occurs before reading
a page [or multiple pages] from swap, so the overhead should not be an issue
here.I introduced a new static inline function "mpol_cond_copy()" to copy the
shared policy to an on-stack policy and remove the flags that would require a
conditional free. The current implementation of mpol_cond_copy() assumes that
the struct mempolicy contains no pointers to dynamically allocated structures
that must be duplicated or reference counted during copy.Signed-off-by: Lee Schermerhorn
Cc: Christoph Lameter
Cc: David Rientjes
Cc: Mel Gorman
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The terms 'policy' and 'mode' are both used in various places to describe the
semantics of the value stored in the 'policy' member of struct mempolicy.
Furthermore, the term 'policy' is used to refer to that member, to the entire
struct mempolicy and to the more abstract concept of the tuple consisting of a
"mode" and an optional node or set of nodes. Recently, we have added "mode
flags" that are passed in the upper bits of the 'mode' [or sometimes,
'policy'] member of the numa APIs.I'd like to resolve this confusion, which perhaps only exists in my mind, by
renaming the 'policy' member to 'mode' throughout, and fixing up the
Documentation. Man pages will be updated separately.Signed-off-by: Lee Schermerhorn
Cc: Christoph Lameter
Cc: David Rientjes
Cc: Mel Gorman
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
MPOL_F_STATIC_NODES and MPOL_F_RELATIVE_NODES don't mean anything for
MPOL_PREFERRED policies that were created with an empty nodemask (for purely
local allocations). They'll never be invalidated because the allowed mems of
a task changes or need to be rebound relative to a cpuset's placement.Also fixes a bug identified by Lee Schermerhorn that disallowed empty
nodemasks to be passed to MPOL_PREFERRED to specify local allocations. [A
different, somewhat incomplete, patch already existed in 25-rc5-mm1.]Cc: Paul Jackson
Cc: Christoph Lameter
Cc: Lee Schermerhorn
Cc: Andi Kleen
Cc: Randy Dunlap
Signed-off-by: Lee Schermerhorn
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Updates Documentation/vm/numa_memory_policy.txt and
Documentation/filesystems/tmpfs.txt to describe optional mempolicy mode flags.Cc: Christoph Lameter
Cc: Lee Schermerhorn
Cc: Andi Kleen
Cc: Randy Dunlap
Signed-off-by: David Rientjes
Signed-off-by: Paul Jackson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The MPOL_BIND policy creates a zonelist that is used for allocations
controlled by that mempolicy. As the per-node zonelist is already being
filtered based on a zone id, this patch adds a version of __alloc_pages() that
takes a nodemask for further filtering. This eliminates the need for
MPOL_BIND to create a custom zonelist.A positive benefit of this is that allocations using MPOL_BIND now use the
local node's distance-ordered zonelist instead of a custom node-id-ordered
zonelist. I.e., pages will be allocated from the closest allowed node with
available memory.[Lee.Schermerhorn@hp.com: Mempolicy: update stale documentation and comments]
[Lee.Schermerhorn@hp.com: Mempolicy: make dequeue_huge_page_vma() obey MPOL_BIND nodemask]
[Lee.Schermerhorn@hp.com: Mempolicy: make dequeue_huge_page_vma() obey MPOL_BIND nodemask rework]
Signed-off-by: Mel Gorman
Acked-by: Christoph Lameter
Signed-off-by: Lee Schermerhorn
Cc: KAMEZAWA Hiroyuki
Cc: Mel Gorman
Cc: Hugh Dickins
Cc: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Nothing in the tree uses nopage any more. Remove support for it in the
core mm code and documentation (and a few stray references to it in
comments).Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add to the generated kerneldoc, with some overview
to go along with those per-function descriptions.Signed-off-by: David Brownell
Cc: Russell King
Cc: Alessandro Zummo
Cc: "Randy.Dunlap"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
* 'kvm-updates-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (147 commits)
KVM: kill file->f_count abuse in kvm
KVM: MMU: kvm_pv_mmu_op should not take mmap_sem
KVM: SVM: remove selective CR0 comment
KVM: SVM: remove now obsolete FIXME comment
KVM: SVM: disable CR8 intercept when tpr is not masking interrupts
KVM: SVM: sync V_TPR with LAPIC.TPR if CR8 write intercept is disabled
KVM: export kvm_lapic_set_tpr() to modules
KVM: SVM: sync TPR value to V_TPR field in the VMCB
KVM: ppc: PowerPC 440 KVM implementation
KVM: Add MAINTAINERS entry for PowerPC KVM
KVM: ppc: Add DCR access information to struct kvm_run
ppc: Export tlb_44x_hwater for KVM
KVM: Rename debugfs_dir to kvm_debugfs_dir
KVM: x86 emulator: fix lea to really get the effective address
KVM: x86 emulator: fix smsw and lmsw with a memory operand
KVM: x86 emulator: initialize src.val and dst.val for register operands
KVM: SVM: force a new asid when initializing the vmcb
KVM: fix kvm_vcpu_kick vs __vcpu_run race
KVM: add ioctls to save/store mpstate
KVM: Rename VCPU_MP_STATE_* to KVM_MP_STATE_*
...
27 Apr, 2008
11 commits
-
Change the statistics to consider that slabs of the same slabcache
can have different number of objects in them since they may be of
different order.Provide a new sysfs field
total_objects
which shows the total objects that the allocated slabs of a slabcache
could hold.Add a max field that holds the largest slab order that was ever used
for a slab cache.Signed-off-by: Christoph Lameter
Signed-off-by: Pekka Enberg -
This functionality is definitely experimental, but is capable of running
unmodified PowerPC 440 Linux kernels as guests on a PowerPC 440 host. (Only
tested with 440EP "Bamboo" guests so far, but with appropriate userspace
support other SoC/board combinations should work.)See Documentation/powerpc/kvm_440.txt for technical details.
[stephen: build fix]
Signed-off-by: Hollis Blanchard
Acked-by: Paul Mackerras
Signed-off-by: Stephen Rothwell
Signed-off-by: Avi Kivity -
* Add "doubler" parameter to enable support for IDE doublers.
* Obsolete "ide=doubler" kernel parameter.
Cc: Geert Uytterhoeven
Signed-off-by: Bartlomiej Zolnierkiewicz -
* Add "cdrom=" and "chs=" parameters.
* Obsolete "hdx=cdrom" and "hdx=cyls,heads,sects" kernel parameters.
Signed-off-by: Bartlomiej Zolnierkiewicz
-
* Add "nodma|noflush|noprobe|nowerr=" parameters.
* Obsolete "hdx=noprobe|none|nowerr|nodma|noflush" kernel parameters.
Signed-off-by: Bartlomiej Zolnierkiewicz
-
* Remove obsoleted "hdx=autotune" kernel parameter
(we always auto-tune PIO if possible nowadays).* Remove no longer needed ide_drive_t.autotune flag.
Signed-off-by: Bartlomiej Zolnierkiewicz
-
We have "vlb|pci_clock=" parameters now.
Acked-by: Sergei Shtylyov
Signed-off-by: Bartlomiej Zolnierkiewicz -
Signed-off-by: Borislav Petkov
Signed-off-by: Bartlomiej Zolnierkiewicz -
Signed-off-by: Borislav Petkov
Signed-off-by: Bartlomiej Zolnierkiewicz -
* Remove obsoleted "idex=" kernel parameters.
* Make probe_* and cmd640_vlb variables static.
Cc: Andrew Morton
Signed-off-by: Bartlomiej Zolnierkiewicz -
Remove obsoleted "idex=reset" kernel parameter
(it has been obsoleted since 1 Nov 2004).Then remove corresponding code from ide_probe_port()
and no longer used ->reset field from ide_hwif_t.Signed-off-by: Bartlomiej Zolnierkiewicz
