26 Jun, 2005
26 commits
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This patch contains the following cleanups:
- make needlessly global code static
- remove the following unused global functions:
- blkdev_scsi_issue_flush_fn
- __blk_attempt_remerge
- remove the following unused EXPORT_SYMBOL's:
- blk_phys_contig_segment
- blk_hw_contig_segment
- blkdev_scsi_issue_flush_fn
- __blk_attempt_remergeSigned-off-by: Adrian Bunk
Acked-by: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch contains the following possible cleanups:
- make the needlessly global function __nvram_set_checksum static
- #if 0 the unused global function nvram_set_checksum
- remove the EXPORT_SYMBOL's for both functionsSigned-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch makes use of ALIGN() to remove duplicate round-up code.
Signed-off-by: Nick Wilson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
o Following patch provides purely cosmetic changes and corrects CodingStyle
guide lines related certain issues like below in kexec related fileso braces for one line "if" statements, "for" loops,
o more than 80 column wide lines,
o No space after "while", "for" and "switch" key wordso Changes:
o take-2: Removed the extra tab before "case" key words.
o take-3: Put operator at the end of line and space before "*/"Signed-off-by: Maneesh Soni
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Makes kexec_crashdump() take a pt_regs * as an argument. This allows to
get exact register state at the point of the crash. If we come from direct
panic assertion NULL will be passed and the current registers saved before
crashdump.This hooks into two places:
die(): check the conditions under which we will panic when calling
do_exit and go there directly with the pt_regs that caused the fatal
fault.die_nmi(): If we receive an NMI lockup while in the kernel use the
pt_regs and go directly to crash_kexec(). We're probably nested up badly
at this point so this might be the only chance to escape with proper
information.Signed-off-by: Alexander Nyberg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
From: "Vivek Goyal"
o Support for /proc/vmcore interface. This interface exports elf core image
either in ELF32 or ELF64 format, depending on the format in which elf headers
have been stored by crashed kernel.
o Added support for CONFIG_VMCORE config option.
o Removed the dependency on /proc/kcore.From: "Eric W. Biederman"
This patch has been refactored to more closely match the prevailing style in
the affected files. And to clearly indicate the dependency between
/proc/kcore and proc/vmcore.cFrom: Hariprasad Nellitheertha
This patch contains the code that provides an ELF format interface to the
previous kernel's memory post kexec reboot.Signed off by Hariprasad Nellitheertha
Signed-off-by: Eric Biederman
Signed-off-by: Vivek Goyal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds support for retrieving the address of elf core header if one
is passed in command line.Signed-off-by: Vivek Goyal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch provides the interfaces necessary to read the dump contents,
treating it as a high memory device.Signed off by Hariprasad Nellitheertha
Signed-off-by: Eric Biederman
Signed-off-by: Vivek Goyal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch retrieves the max_pfn being used by previous kernel and stores it
in a safe location (saved_max_pfn) before it is overwritten due to user
defined memory map. This pfn is used to make sure that user does not try to
read the physical memory beyond saved_max_pfn.Signed-off-by: Vivek Goyal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add kexec support for s390 architecture.
From: Milton Miller
- Fix passing of first argument to relocate_kernel assembly.
- Fix Kconfig description.
- Remove wrong comment and comments that describe obvious things.
- Allow only KEXEC_TYPE_DEFAULT as image type -> dump not supported.Acked-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch introduces the architecture independent implementation the
sys_kexec_load, the compat_sys_kexec_load system calls.Kexec on panic support has been integrated into the core patch and is
relatively clean.In addition the hopefully architecture independent option
crashkernel=size@location has been docuemented. It's purpose is to reserve
space for the panic kernel to live, and where no DMA transfer will ever be
setup to access.Signed-off-by: Eric Biederman
Signed-off-by: Alexander Nyberg
Signed-off-by: Adrian Bunk
Signed-off-by: Vivek Goyal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds a new preemption model: 'Voluntary Kernel Preemption'. The
3 models can be selected from a new menu:(X) No Forced Preemption (Server)
( ) Voluntary Kernel Preemption (Desktop)
( ) Preemptible Kernel (Low-Latency Desktop)we still default to the stock (Server) preemption model.
Voluntary preemption works by adding a cond_resched()
(reschedule-if-needed) call to every might_sleep() check. It is lighter
than CONFIG_PREEMPT - at the cost of not having as tight latencies. It
represents a different latency/complexity/overhead tradeoff.It has no runtime impact at all if disabled. Here are size stats that show
how the various preemption models impact the kernel's size:text data bss dec hex filename
3618774 547184 179896 4345854 424ffe vmlinux.stock
3626406 547184 179896 4353486 426dce vmlinux.voluntary +0.2%
3748414 548640 179896 4476950 445016 vmlinux.preempt +3.5%voluntary-preempt is +0.2% of .text, preempt is +3.5%.
This feature has been tested for many months by lots of people (and it's
also included in the RHEL4 distribution and earlier variants were in Fedora
as well), and it's intended for users and distributions who dont want to
use full-blown CONFIG_PREEMPT for one reason or another.Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The following patches add dynamic sched domains functionality that was
extensively discussed on lkml and lse-tech. I would like to see this added to
-mmo The main advantage with this feature is that it ensures that the scheduler
load balacing code only balances against the cpus that are in the sched
domain as defined by an exclusive cpuset and not all of the cpus in the
system. This removes any overhead due to load balancing code trying to
pull tasks outside of the cpu exclusive cpuset only to be prevented by
the tasks' cpus_allowed mask.
o cpu exclusive cpusets are useful for servers running orthogonal
workloads such as RT applications requiring low latency and HPC
applications that are throughput sensitiveo It provides a new API partition_sched_domains in sched.c
that makes dynamic sched domains possible.
o cpu_exclusive cpusets sets are now associated with a sched domain.
Which means that the users can dynamically modify the sched domains
through the cpuset file system interface
o ia64 sched domain code has been updated to support this feature as well
o Currently, this does not support hotplug. (However some of my tests
indicate hotplug+preempt is currently broken)
o I have tested it extensively on x86.
o This should have very minimal impact on performance as none of
the fast paths are affectedSigned-off-by: Dinakar Guniguntala
Acked-by: Paul Jackson
Acked-by: Nick Piggin
Acked-by: Matthew Dobson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Consolidate balance-on-exec with balance-on-fork. This is made easy by the
sched-domains RCU patches.As well as the general goodness of code reduction, this allows the runqueues
to be unlocked during balance-on-fork.schedstats is a problem. Maybe just have balance-on-event instead of
distinguishing fork and exec?Signed-off-by: Nick Piggin
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Instead of requiring architecture code to interact with the scheduler's
locking implementation, provide a couple of defines that can be used by the
architecture to request runqueue unlocked context switches, and ask for
interrupts to be enabled over the context switch.Also replaces the "switch_lock" used by these architectures with an oncpu
flag (note, not a potentially slow bitflag). This eliminates one bus
locked memory operation when context switching, and simplifies the
task_running function.Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Do some basic initial tuning.
Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add SCHEDSTAT statistics for sched-balance-fork.
Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Reimplement the balance on exec balancing to be sched-domains aware. Use this
to also do balance on fork balancing. Make x86_64 do balance on fork over the
NUMA domain.The problem that the non sched domains aware blancing became apparent on dual
core, multi socket opterons. What we want is for the new tasks to be sent to
a different socket, but more often than not, we would first load up our
sibling core, or fill two cores of a single remote socket before selecting a
new one.This gives large improvements to STREAM on such systems.
Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the very aggressive idle stuff that has recently gone into 2.6 - it is
going against the direction we are trying to go. Hopefully we can regain
performance through other methods.Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Do CPU load averaging over a number of different intervals. Allow each
interval to be chosen by sending a parameter to source_load and target_load.
0 is instantaneous, idx > 0 returns a decaying average with the most recent
sample weighted at 2^(idx-1). To a maximum of 3 (could be easily increased).So generally a higher number will result in more conservative balancing.
Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
2.6.12-rc6-mm1 has a few remaining synchronize_kernel()s, some (but not
all) in comments. This patch changes these synchronize_kernel() calls (and
comments) to synchronize_rcu() or synchronize_sched() as follows:- arch/x86_64/kernel/mce.c mce_read(): change to synchronize_sched() to
handle races with machine-check exceptions (synchronize_rcu() would not cut
it given RCU implementations intended for hardcore realtime use.- drivers/input/serio/i8042.c i8042_stop(): change to synchronize_sched() to
handle races with i8042_interrupt() interrupt handler. Again,
synchronize_rcu() would not cut it given RCU implementations intended for
hardcore realtime use.- include/*/kdebug.h comments: change to synchronize_sched() to handle races
with NMIs. As before, synchronize_rcu() would not cut it...- include/linux/list.h comment: change to synchronize_rcu(), since this
comment is for list_del_rcu().- security/keys/key.c unregister_key_type(): change to synchronize_rcu(),
since this is interacting with RCU read side.- security/keys/process_keys.c install_session_keyring(): change to
synchronize_rcu(), since this is interacting with RCU read side.Signed-off-by: "Paul E. McKenney"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Without this patch, Linux provokes emergency disk shutdowns and
similar nastiness. It was in SuSE kernels for some time, IIRC.Signed-off-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Using CPU hotplug to support suspend/resume SMP. Both S3 and S4 use
disable/enable_nonboot_cpus API. The S4 part is based on Pavel's original S4
SMP patch.Signed-off-by: Li Shaohua
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds __cpuinit and __cpuinitdata sections that need to exist past
boot to support cpu hotplug.Caveat: This is done *only* for EM64T CPU Hotplug support, on request from
Andi Kleen. Much of the generic hotplug code in kernel, and none of the other
archs that support CPU hotplug today, i386, ia64, ppc64, s390 and parisc dont
mark sections with __cpuinit, but only mark them as __devinit, and
__devinitdata.If someone is motivated to change generic code, we need to make sure all
existing hotplug code does not break, on other arch's that dont use __cpuinit,
and __cpudevinit.Signed-off-by: Ashok Raj
Acked-by: Andi Kleen
Acked-by: Zwane Mwaikambo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I really wish smp_prepare_cpu() would disappear eventually. In the interim
this is ideally a weak function, so we dont end up changing several places
to define this dummy in headers.Today since the dummy declaration is done only in drivers/base/cpu.c but
the function is called in kernel/power/smp.c i get undefined reference in
my cpu hotplug code for x86_64 under development.Signed-off-by: Ashok Raj
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I8K: Change to use stock dmi infrastructure instead of homegrown
parsing code. The driver now requires box's DMI data to match
list of supported models so driver can be safely compiled-in
by default without fear of it poking into random SMM BIOS
code. DMI checks can be ignored with i8k.ignore_dmi option.Signed-off-by: Dmitry Torokhov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Jun, 2005
1 commit
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This patch fixes sparse warnings in the qnx4fs (and might even make
qnx4fs work on big-endian boxes)Signed-off-by: Alexey Dobriyan
Signed-off-by: Domen Puncer
Signed-off-by: Anders Larsen
Signed-off-by: Linus Torvalds
24 Jun, 2005
13 commits
-
Another rollup of patches which give various symbols static scope
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch reworks filemap_xip.c with the goal to reduce code duplication
from mm/filemap.c. It applies agains 2.6.12-rc6-mm1. Instead of
implementing the aio functions, this one implements the synchronous
read/write functions only. For readv and writev, the generic fallback is
used. For aio, we rely on the application doing the fallback. Since our
"synchronous" function does memcpy immediately anyway, there is no
performance difference between using the fallbacks or implementing each
operation.Signed-off-by: Carsten Otte
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
These are the ext2 related parts. Ext2 now uses the xip_* file operations
along with the get_xip_page aop when mounted with -o xip.Signed-off-by: Carsten Otte
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- generic_file* file operations do no longer have a xip/non-xip split
- filemap_xip.c implements a new set of fops that require get_xip_page
aop to work proper. all new fops are exported GPL-only (don't like to
see whatever code use those except GPL modules)
- __xip_unmap now uses page_check_address, which is no longer static
in rmap.c, and defined in linux/rmap.h
- mm/filemap.h is now much more clean, plainly having just Linus'
inline funcs moved here from filemap.c
- fix includes in filemap_xip to make it build cleanly on i386Signed-off-by: Carsten Otte
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is the block device related part. The block device operation
direct_access now has a struct block_device as first parameter.Signed-off-by: Carsten Otte
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds version and srcversion files to
/sys/module/${modulename} containing the version and srcversion fields
of the module's modinfo section (if present)./sys/module/e1000
|-- srcversion
`-- versionThis patch differs slightly from the version posted in January, as it
now uses the new kstrdup() call in -mm.Why put this in sysfs?
a) Tools like DKMS, which deal with changing out individual kernel
modules without replacing the whole kernel, can behave smarter if they
can tell the version of a given module. The autoinstaller feature, for
example, which determines if your system has a "good" version of a
driver (i.e. if the one provided by DKMS has a newer verson than that
provided by the kernel package installed), and to automatically compile
and install a newer version if DKMS has it but your kernel doesn't yet
have that version.b) Because sysadmins manually, or with tools like DKMS, can switch out
modules on the file system, you can't count on 'modinfo foo.ko', which
looks at /lib/modules/${kernelver}/... actually matching what is loaded
into the kernel already. Hence asking sysfs for this.c) as the unbind-driver-from-device work takes shape, it will be
possible to rebind a driver that's built-in (no .ko to modinfo for the
version) to a newly loaded module. sysfs will have the
currently-built-in version info, for comparison.d) tech support scripts can then easily grab the version info for what's
running presently - a question I get often.There has been renewed interest in this patch on linux-scsi by driver
authors.As the idea originated from GregKH, I leave his Signed-off-by: intact,
though the implementation is nearly completely new. Compiled and run on
x86 and x86_64.From: Matthew Dobson
build fix
From: Thierry Vignaud
build fix
From: Matthew Dobson
warning fix
Signed-off-by: Greg Kroah-Hartman
Signed-off-by: Matt Domsch
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Set the recovery directory via /proc/fs/nfsd/nfs4recoverydir.
It may be changed any time, but is used only on startup.
Signed-off-by: Andy Adamson
Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds the code to create and remove client subdirectories from the
recovery directory, as described in the previous patch comment.Signed-off-by: Andy Adamson
Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
NFSv4 clients are required to know what state they have on the server so that
they can reclaim it on server reboot. However, it is possible for
pathalogical combinations of server reboots and network partitions to leave a
client in a state where it cannot know whether it has lost its state on the
server.For this reason, rfc3530 requires that we store some information about clients
to stable storage.So we maintain a directory /var/lib/nfs/v4recovery with a subdirectory for
each client with active state. We leave open the possibility of including
files underneath each such subdirectory with information about the client, but
for now the subdirectories are empty.We create a client subdirectory whenever a client makes its first non-reclaim
open_confirm.We remove a client subdirectory whenever either
a) its lease expires, or
b) the grace period ends without it reclaiming anything.
When handling reclaims, we allow the reclaim if and only if the client doing
the reclaim has a subdirectory.This patch adds just the code to scan the recovery directory on nfsd startup.
Signed-off-by: Andy Adamson
Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The cb_parsed field is only used by probe_callback, to determine whether the
callback information has been filled in by setclientid. But there is no way
that probe_callback() can be called without that having already happened, so
that check is superfluous, as is cb_parsed.Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Trivial renaming patch:
I can never remember, while looking at various lists relating the nfsd4 state
structures, which are the "heads" and which are items on other lists, or which
structures are actually on the various lists. The following convention helps
me: given structures foo and bar, with foo containing the head of a list of
bars, use "bars" for the name of the head of the list contained in the struct
foo, and use "per_foo" for the entries in the struct bars.Already done for struct nfs4_file; go ahead and do it for the other nfsd4
state structures.Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch contains the following possible cleanups:
- make needlessly global code static
Signed-off-by: Adrian Bunk
Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
