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Amerigo Wang 06a7f71124 kexec: premit reduction of the reserved memory size 
Implement shrinking the reserved memory for crash kernel, if it is more
than enough.

For example, if you have already reserved 128M, now you just want 100M,
you can do:

# echo $((100*1024*1024)) > /sys/kernel/kexec_crash_size

Note, you can only do this before loading the crash kernel.

Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Neil Horman <nhorman@redhat.com>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:13 -08:00
..
gcov
microblaze: Enable GCOV_PROFILE_ALL
2009-09-21 14:29:21 +02:00
irq
genirq: Convert irq_desc.lock to raw_spinlock
2009-12-14 23:55:33 +01:00
power
vt: introduce and use vt_kmsg_redirect() function
2009-12-15 08:53:28 -08:00
time
timecompare: fix half-Y2K38 problem in timecompare_update while calculating offset
2009-12-16 07:19:57 -08:00
trace
const: constify remaining pipe_buf_operations
2009-12-16 07:20:05 -08:00
.gitignore
…
acct.c
bsdacct: fix uid/gid misreporting
2009-12-15 08:53:10 -08:00
async.c
async: Fix lack of boot-time console due to insufficient synchronization
2009-06-08 12:31:53 -07:00
audit_tree.c
Fix rule eviction order for AUDIT_DIR
2009-06-24 00:02:38 -04:00
audit_watch.c
Audit: reorganize struct audit_watch to save 8 bytes
2009-09-24 03:50:25 -04:00
audit.c
Audit: send signal info if selinux is disabled
2009-09-24 03:50:26 -04:00
audit.h
Fix rule eviction order for AUDIT_DIR
2009-06-24 00:02:38 -04:00
auditfilter.c
Audit: clean up all op= output to include string quoting
2009-06-24 00:00:52 -04:00
auditsc.c
Audit: rearrange audit_context to save 16 bytes per struct
2009-09-24 03:50:26 -04:00
backtracetest.c
…
bounds.c
…
capability.c
remove CONFIG_SECURITY_FILE_CAPABILITIES compile option
2009-11-24 15:06:47 +11:00
cgroup_freezer.c
cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time
2009-09-24 07:20:58 -07:00
cgroup.c
cgroup: fix strstrip() misuse
2009-10-29 07:39:25 -07:00
compat.c
signals: implement sys_rt_tgsigqueueinfo
2009-04-30 19:24:24 +02:00
configs.c
…
cpu.c
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-12-12 11:34:10 -08:00
cpuset.c
sched: Fix balance vs hotplug race
2009-12-06 21:10:56 +01:00
cred-internals.h
…
cred.c
creds_are_invalid() needs to be exported for use by modules:
2009-09-23 11:02:26 -07:00
delayacct.c
headers: taskstats_kern.h trim
2009-09-18 09:48:52 -07:00
dma.c
…
exec_domain.c
Get rid of indirect include of fs_struct.h
2009-03-31 23:00:27 -04:00
exit.c
sched: Convert pi_lock to raw_spinlock
2009-12-14 23:55:33 +01:00
extable.c
Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-04-05 11:04:19 -07:00
fork.c
ptrace: copy_process() should disable stepping
2009-12-16 07:20:08 -08:00
freezer.c
sched: fix nr_uninterruptible accounting of frozen tasks really
2009-07-18 14:19:53 +02:00
futex_compat.c
futex: Fix compat_futex to be same as futex for REQUEUE_PI
2009-08-10 15:41:12 +02:00
futex.c
rtmutes: Convert rtmutex.lock to raw_spinlock
2009-12-14 23:55:33 +01:00
groups.c
groups: move code to kernel/groups.c
2009-06-16 19:47:48 -07:00
hrtimer.c
hrtimers: Convert to raw_spinlocks
2009-12-14 23:55:34 +01:00
hung_task.c
softlockup: Fix hung_task_check_count sysctl
2009-11-27 06:21:57 +01:00
hw_breakpoint.c
perf_event: Convert to raw_spinlock
2009-12-14 23:55:34 +01:00
itimer.c
itimers: Fix racy writes to cpu_itimer fields
2009-11-18 16:32:12 +01:00
kallsyms.c
hw-breakpoints: Fix broken hw-breakpoint sample module
2009-11-10 11:23:29 +01:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
mutex: Better control mutex adaptive spinning config
2009-12-03 11:50:11 +01:00
Kconfig.preempt
…
kexec.c
kexec: premit reduction of the reserved memory size
2009-12-16 07:20:13 -08:00
kfifo.c
kfifo: Use "const" definitions
2009-09-19 13:13:17 -07:00
kgdb.c
kgdb: Always process the whole breakpoint list on activate or deactivate
2009-12-11 08:43:20 -06:00
kmod.c
security: report the module name to security_module_request
2009-11-10 09:33:46 +11:00
kprobes.c
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-12-05 15:30:21 -08:00
ksysfs.c
kexec: premit reduction of the reserved memory size
2009-12-16 07:20:13 -08:00
kthread.c
sched: Fix kthread_bind() by moving the body of kthread_bind() to sched.c
2009-11-03 07:25:00 +01:00
latencytop.c
…
lockdep_internals.h
lockdep: BFS cleanup
2009-07-24 10:53:29 +02:00
lockdep_proc.c
seq_file: constify seq_operations
2009-09-23 07:39:29 -07:00
lockdep_states.h
…
lockdep.c
locking: Convert __raw_spin* functions to arch_spin*
2009-12-14 23:55:32 +01:00
Makefile
Merge branch 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2009-12-08 08:02:38 -08:00
module.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2009-12-14 09:58:24 -08:00
mutex-debug.c
headers: remove sched.h from interrupt.h
2009-10-11 11:20:58 -07:00
mutex-debug.h
locking: Implement new raw_spinlock
2009-12-14 23:55:32 +01:00
mutex.c
mutex: Better control mutex adaptive spinning config
2009-12-03 11:50:11 +01:00
mutex.h
…
notifier.c
kprobes: Fix to add __kprobes to notify_die
2009-08-30 03:08:26 +02:00
ns_cgroup.c
cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time
2009-09-24 07:20:58 -07:00
nsproxy.c
nsproxy: extract create_nsproxy()
2009-06-18 13:03:56 -07:00
panic.c
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-10-08 12:16:35 -07:00
params.c
tree-wide: convert open calls to remove spaces to skip_spaces() lib function
2009-12-15 08:53:32 -08:00
perf_event.c
perf_event: Convert to raw_spinlock
2009-12-14 23:55:34 +01:00
pid_namespace.c
pidns: deny CLONE_PARENT|CLONE_NEWPID combination
2009-09-24 07:21:04 -07:00
pid.c
pid: reduce code size by using a pointer to iterate over array
2009-12-16 07:20:12 -08:00
pm_qos_params.c
pm_qos: clean up racy global "name" variable
2009-10-14 15:31:10 +02:00
posix-cpu-timers.c
posix-cpu-timers: optimize and document timer_create callback
2009-11-18 12:36:05 +01:00
posix-timers.c
time: Introduce CLOCK_REALTIME_COARSE
2009-08-21 21:43:46 +02:00
printk.c
Merge branch 'core-printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-12-05 09:50:22 -08:00
profile.c
kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file
2009-09-20 20:15:40 +02:00
ptrace.c
ptrace: __ptrace_detach: do __wake_up_parent() if we reap the tracee
2009-09-24 07:20:59 -07:00
rcupdate.c
rcu: Re-arrange code to reduce #ifdef pain
2009-11-22 18:58:16 +01:00
rcutiny.c
rcu: Eliminate unneeded function wrapping
2009-11-22 18:58:16 +01:00
rcutorture.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2009-12-14 09:58:24 -08:00
rcutree_plugin.h
rcu: Add expedited grace-period support for preemptible RCU
2009-12-03 11:35:25 +01:00
rcutree_trace.c
rcu: Add expedited grace-period support for preemptible RCU
2009-12-03 11:35:25 +01:00
rcutree.c
rcu: Add expedited grace-period support for preemptible RCU
2009-12-03 11:35:25 +01:00
rcutree.h
rcu: Add expedited grace-period support for preemptible RCU
2009-12-03 11:35:25 +01:00
relay.c
const: constify remaining pipe_buf_operations
2009-12-16 07:20:05 -08:00
res_counter.c
memcg: some modification to softlimit under hierarchical memory reclaim.
2009-10-01 16:11:13 -07:00
resource.c
resources: when allocate_resource() fails, leave resource untouched
2009-11-04 13:06:46 -08:00
rtmutex_common.h
rt_mutex: add proxy lock routines
2009-04-06 11:14:02 +02:00
rtmutex-debug.c
sched: Convert pi_lock to raw_spinlock
2009-12-14 23:55:33 +01:00
rtmutex-debug.h
…
rtmutex-tester.c
…
rtmutex.c
rtmutes: Convert rtmutex.lock to raw_spinlock
2009-12-14 23:55:33 +01:00
rtmutex.h
…
rwsem.c
…
sched_clock.c
sched_clock: Fix atomicity/continuity bug by using cmpxchg64()
2009-09-30 22:56:10 +02:00
sched_cpupri.c
sched: Convert cpupri lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched_cpupri.h
sched: Convert cpupri lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched_debug.c
sched: Convert rq->lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched_fair.c
sched: Convert rq->lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched_features.h
sched: Discard some old bits
2009-12-09 10:03:07 +01:00
sched_idletask.c
sched: Convert rq->lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched_rt.c
sched: Convert rt_runtime_lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched_stats.h
sched: remove unused fields from struct rq
2009-03-24 23:16:51 +01:00
sched.c
sched: Convert pi_lock to raw_spinlock
2009-12-14 23:55:33 +01:00
seccomp.c
…
semaphore.c
…
signal.c
signals: check ->group_stop_count after tracehook_get_signal()
2009-12-16 07:20:09 -08:00
slow-work-debugfs.c
SLOW_WORK: Move slow_work's proc file to debugfs
2009-12-01 08:20:31 -08:00
slow-work.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6
2009-12-08 07:38:50 -08:00
slow-work.h
SLOW_WORK: Move slow_work's proc file to debugfs
2009-12-01 08:20:31 -08:00
smp.c
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-12-15 09:02:01 -08:00
softirq.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2009-12-14 09:58:24 -08:00
softlockup.c
percpu: make percpu symbols under kernel/ and mm/ unique
2009-10-29 22:34:13 +09:00
spinlock.c
locking: Cleanup the name space completely
2009-12-14 23:55:33 +01:00
srcu.c
rcu: Add synchronize_srcu_expedited()
2009-10-26 09:40:30 +01:00
stacktrace.c
…
stop_machine.c
cpumask: remove cpumask_t from core
2009-03-30 22:05:17 +10:30
sys_ni.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2009-12-08 07:55:01 -08:00
sys.c
kernel/sys.c: fix "warning: do-while statement is not a compound statement" noise
2009-12-15 08:53:26 -08:00
sysctl_binary.c
sysctl binary: Reorder the tests to process wild card entries first.
2009-11-12 01:42:31 -08:00
sysctl_check.c
ipv4 05/05: add sysctl to accept packets with local source addresses
2009-12-03 12:14:38 -08:00
sysctl.c
'sysctl_max_map_count' should be non-negative
2009-12-15 08:53:23 -08:00
taskstats.c
genetlink: make netns aware
2009-07-12 14:03:27 -07:00
test_kprobes.c
…
time.c
Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-12-08 19:27:08 -08:00
timeconst.pl
…
timer.c
Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-23 09:46:15 -07:00
tracepoint.c
trivial: fix typo "to to" in multiple files
2009-09-21 15:14:55 +02:00
tsacct.c
…
uid16.c
headers: utsname.h redux
2009-09-23 18:13:10 -07:00
up.c
…
user_namespace.c
…
user-return-notifier.c
core: Clean up user return notifers use of per_cpu
2009-12-02 10:22:59 +01:00
user.c
uids: Prevent tear down race
2009-11-02 16:02:39 +01:00
utsname_sysctl.c
sysctl kernel: Remove binary sysctl logic
2009-11-12 02:04:55 -08:00
utsname.c
utsns: extract creeate_uts_ns()
2009-06-18 13:03:55 -07:00
wait.c
locking, sched: Give waitqueue spinlocks their own lockdep classes
2009-08-10 14:43:09 +02:00
workqueue.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2009-12-10 09:35:44 -08:00