sugar/linux
1
0
Fork 0
Code Activity
Files
48fd11880b5ef04270be8a87d9a9a9ee2fdae338
linux/kernel
History
Kevin Cernekee 48fd11880b module: Fix performance regression on modules with large symbol tables 
Looking at /proc/kallsyms, one starts to ponder whether all of the extra
strtab-related complexity in module.c is worth the memory savings.

Instead of making the add_kallsyms() loop even more complex, I tried the
other route of deleting the strmap logic and naively copying each string
into core_strtab with no consideration for consolidating duplicates.

Performance on an "already exists" insmod of nvidia.ko (runs
add_kallsyms() but does not actually initialize the module):

	Original scheme: 1.230s
	With naive copying: 0.058s

Extra space used: 35k (of a 408k module).

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <73defb5e4bca04a6431392cc341112b1@localhost>
2012-01-13 09:32:14 +10:30
..
debug
kdb: Make KDB use the new is_idle_task() API
2011-12-11 10:31:52 -08:00
events
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
gcov
gcov: disable CONSTRUCTORS for UML
2011-07-26 16:49:45 -07:00
irq
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-01-08 13:21:22 -08:00
power
PM/Hibernate: do not count debug pages as savable
2012-01-10 16:30:42 -08:00
sched
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-11 22:52:48 -08:00
time
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-01-08 13:21:22 -08:00
trace
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-01-08 12:19:57 -08:00
.gitignore
…
acct.c
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-01-08 12:19:57 -08:00
async.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
audit_tree.c
audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()
2011-07-20 14:10:11 -07:00
audit_watch.c
…
audit.c
audit: always follow va_copy() with va_end()
2012-01-08 14:15:21 -08:00
audit.h
…
auditfilter.c
…
auditsc.c
auditsc: propage umode_t
2012-01-03 22:55:17 -05:00
backtracetest.c
…
bounds.c
memcg: remove direct page_cgroup-to-page pointer
2011-03-23 19:46:28 -07:00
capability.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
cgroup_freezer.c
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
cgroup.c
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
compat.c
kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure
2011-10-31 19:30:05 -04:00
configs.c
kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n
2011-07-25 20:57:15 -07:00
cpu_pm.c
cpu_pm: call notifiers during suspend
2011-09-23 12:05:29 +05:30
cpu.c
Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2012-01-08 13:10:57 -08:00
cpuset.c
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
crash_dump.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
cred.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
delayacct.c
KVM: Steal time implementation
2011-07-14 12:59:14 +03:00
dma.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
elfcore.c
…
exec_domain.c
…
exit.c
Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-01-10 16:59:59 -08:00
extable.c
extable, core_kernel_data(): Make sure all archs define _sdata
2011-05-20 08:56:56 +02:00
fork.c
Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-01-10 16:59:59 -08:00
freezer.c
freezer: kill unused set_freezable_with_signal()
2011-11-23 09:28:17 -08:00
futex_compat.c
userns: user namespaces: convert several capable() calls
2011-03-23 19:47:08 -07:00
futex.c
futex: Fix uninterruptible loop due to gate_area
2011-12-31 11:48:28 -08:00
groups.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
hrtimer.c
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-11-28 08:43:52 -08:00
hung_task.c
hung_task: fix false positive during vfork
2012-01-03 16:14:32 -08:00
irq_work.c
kernel: fix two implicit header assumptions in irq_work.c
2011-10-31 09:20:12 -04:00
itimer.c
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
jump_label.c
Merge remote-tracking branch 'tip/perf/core' into kvm-updates/3.3
2011-12-27 11:22:24 +02:00
kallsyms.c
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2011-03-25 17:52:22 -07:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
arch:Kconfig.locks Remove unused config option.
2011-04-10 17:01:05 +02:00
Kconfig.preempt
sched: Isolate preempt counting in its own config option
2011-06-10 15:15:40 +02:00
kexec.c
PM / Sleep: Replace mutex_[un]lock(&pm_mutex) with [un]lock_system_sleep()
2011-12-08 23:22:29 +01:00
kfifo.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kmod.c
Merge branch 'pm-sleep' into pm-for-linus
2011-12-25 23:42:20 +01:00
kprobes.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
ksysfs.c
kernel: ksysfs.c is implicitly using stat.h
2011-10-31 09:20:13 -04:00
kthread.c
freezer: kill unused set_freezable_with_signal()
2011-11-23 09:28:17 -08:00
latencytop.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
lockdep_internals.h
…
lockdep_proc.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
lockdep_states.h
…
lockdep.c
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-06 08:02:58 -08:00
Makefile
sched: Move all scheduler bits into kernel/sched/
2011-11-17 12:20:22 +01:00
module.c
module: Fix performance regression on modules with large symbol tables
2012-01-13 09:32:14 +10:30
mutex-debug.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
mutex-debug.h
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
mutex.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
mutex.h
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
notifier.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
nsproxy.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
padata.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
panic.c
lockdep, bug: Exclude TAINT_OOT_MODULE from disabling lock debugging
2011-12-07 23:32:10 +01:00
params.c
kernel: params.c needs module.h not moduleparam.h
2011-10-31 09:20:13 -04:00
pid_namespace.c
pidns: call pid_ns_prepare_proc() from create_pid_namespace()
2011-03-23 19:46:58 -07:00
pid.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
posix-cpu-timers.c
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
posix-timers.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
printk.c
Merge branch 'core-printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-06 08:01:59 -08:00
profile.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
ptrace.c
ptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach
2012-01-04 15:01:59 -08:00
range.c
range: fix bogus misuse of module.h to get printk()
2011-10-31 09:20:11 -04:00
rcu.h
rcu: Deconfuse dynticks entry-exit tracing
2011-12-11 10:31:42 -08:00
rcupdate.c
rcu: Detect illegal rcu dereference in extended quiescent state
2011-12-11 10:31:30 -08:00
rcutiny_plugin.h
rcu: Apply ACCESS_ONCE() to rcu_boost() return value
2011-12-11 10:33:19 -08:00
rcutiny.c
rcu: Augment rcu_batch_end tracing for idle and callback state
2011-12-11 10:32:22 -08:00
rcutorture.c
rcu: Add rcutorture tests for srcu_read_lock_raw()
2011-12-11 10:32:21 -08:00
rcutree_plugin.h
rcu: Apply ACCESS_ONCE() to rcu_boost() return value
2011-12-11 10:33:19 -08:00
rcutree_trace.c
rcu: Track idleness independent of idle tasks
2011-12-11 10:31:24 -08:00
rcutree.c
rcu: Augment rcu_batch_end tracing for idle and callback state
2011-12-11 10:32:22 -08:00
rcutree.h
rcu: Keep invoking callbacks if CPU otherwise idle
2011-12-11 10:32:09 -08:00
relay.c
switch debugfs to umode_t
2012-01-03 22:54:56 -05:00
res_counter.c
resource cgroups: remove bogus cast
2011-12-13 07:43:08 -08:00
resource.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
rtmutex_common.h
…
rtmutex-debug.c
lockdep, rtmutex, bug: Show taint flags on error
2011-12-06 08:16:49 +01:00
rtmutex-debug.h
…
rtmutex-tester.c
rtmutex-tester: convert sysdev_class to a regular subsystem
2011-12-14 14:54:22 -08:00
rtmutex.c
Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"
2011-12-11 10:33:18 -08:00
rtmutex.h
…
rwsem.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
seccomp.c
…
semaphore.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
signal.c
user namespace: make signal.c respect user namespaces
2012-01-10 16:30:54 -08:00
smp.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
softirq.c
rcu: Fix early call to rcu_idle_enter()
2011-12-11 10:31:38 -08:00
spinlock.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
srcu.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
stacktrace.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
stop_machine.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
sys_ni.c
Cross Memory Attach
2011-10-31 17:30:44 -07:00
sys.c
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
sysctl_binary.c
binary_sysctl(): fix memory leak
2011-12-20 10:25:04 -08:00
sysctl_check.c
xfs: remove subdirectories
2011-08-12 16:21:35 -05:00
sysctl.c
x86: Panic on detection of stack overflow
2011-12-05 11:37:47 +01:00
taskstats.c
Make TASKSTATS require root access
2011-09-19 17:04:37 -07:00
test_kprobes.c
…
time.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
timeconst.pl
…
timer.c
Merge branch 'core-debugobjects-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-06 07:53:34 -08:00
tracepoint.c
Tracepoint: Dissociate from module mutex
2011-08-10 20:38:14 -04:00
tsacct.c
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
uid16.c
userns: user namespaces: convert several capable() calls
2011-03-23 19:47:08 -07:00
up.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
user_namespace.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
user-return-notifier.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
user.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
utsname_sysctl.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
utsname.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
wait.c
lockdep/waitqueues: Add better annotation
2011-12-21 10:07:39 +01:00
watchdog.c
watchdog: move watchdog_*_all_cpus under CONFIG_SYSCTL
2011-10-31 17:30:53 -07:00
workqueue_sched.h
…
workqueue.c
workqueue: make alloc_workqueue() take printf fmt and args for name
2012-01-10 16:30:54 -08:00