Matt Helsley 925d1c401f procfs task exe symlink ... The kernel implements readlink of /proc/pid/exe by getting the file from the first executable VMA. Then the path to the file is reconstructed and reported as the result. Because of the VMA walk the code is slightly different on nommu systems. This patch avoids separate /proc/pid/exe code on nommu systems. Instead of walking the VMAs to find the first executable file-backed VMA we store a reference to the exec'd file in the mm_struct. That reference would prevent the filesystem holding the executable file from being unmounted even after unmapping the VMAs. So we track the number of VM_EXECUTABLE VMAs and drop the new reference when the last one is unmapped. This avoids pinning the mounted filesystem. [akpm@linux-foundation.org: improve comments] [yamamoto@valinux.co.jp: fix dup_mmap] Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: David Howells <dhowells@redhat.com> Cc:"Eric W. Biederman" <ebiederm@xmission.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-04-29 08:06:17 -07:00
..
irq	kernel: explicitly include required header files under kernel/	2008-04-29 08:06:04 -07:00
power	PM/gxfb: add hook to PM console layer that allows disabling of suspend VT switch	2008-04-28 08:58:36 -07:00
time	softlockup: fix NOHZ wakeup	2008-04-25 00:25:08 +02:00
.gitignore	Update kernel/.gitignore with new auto-generated files	2008-02-09 23:27:01 -08:00
acct.c	bsd_acct: using task_struct->tgid is not right in pid-namespaces	2008-03-24 19:22:20 -07:00
audit.c	Audit: internally use the new LSM audit hooks	2008-04-19 09:52:37 +10:00
audit.h	SELinux: use new audit hooks, remove redundant exports	2008-04-19 09:53:46 +10:00
audit_tree.c	Introduce path_put()	2008-02-14 21:13:33 -08:00
auditfilter.c	Audit: Final renamings and cleanup	2008-04-19 09:59:43 +10:00
auditsc.c	Audit: Final renamings and cleanup	2008-04-19 09:59:43 +10:00
backtracetest.c	x86: add a simple backtrace test module	2008-01-30 13:33:08 +01:00
bounds.c	mm: Get rid of __ZONE_COUNT	2008-04-28 08:58:22 -07:00
capability.c	Add 64-bit capability support to the kernel	2008-02-05 09:44:20 -08:00
cgroup.c	cgroups: add an owner to the mm_struct	2008-04-29 08:06:10 -07:00
cgroup_debug.c	CGroup API files: move "releasable" to cgroup_debug subsystem	2008-04-29 08:06:09 -07:00
compat.c	generic: reduce stack pressure in sched_affinity	2008-04-19 19:44:59 +02:00
configs.c
cpu.c	simplify cpu_hotplug_begin()/put_online_cpus()	2008-04-29 08:06:11 -07:00
cpuset.c	Cpuset hardwall flag: add a mem_hardwall flag to cpusets	2008-04-29 08:06:11 -07:00
delayacct.c	Add scaled time to taskstats based process accounting	2007-10-18 14:37:28 -07:00
dma.c	whitespace fixes: DMA channel allocator	2007-10-18 14:37:24 -07:00
exec_domain.c	whitespace fixes: execution domains	2007-10-18 14:37:26 -07:00
exit.c	cgroups: add an owner to the mm_struct	2008-04-29 08:06:10 -07:00
extable.c	module: Don't report discarded init pages as kernel text.	2008-01-29 17:13:18 +11:00
fork.c	procfs task exe symlink	2008-04-29 08:06:17 -07:00
futex.c	NULL noise: fs/*, mm/*, kernel/*	2008-03-30 14:18:41 -07:00
futex_compat.c	futex_compat __user annotation	2008-03-30 14:18:41 -07:00
hrtimer.c	hrtimer: raise softirq unlocked to avoid circular lock dependency	2008-04-28 22:22:21 +02:00
itimer.c	ITIMER_REAL: convert to use struct pid	2008-02-08 09:22:29 -08:00
kallsyms.c	remove support for un-needed _extratext section	2008-02-06 10:41:01 -08:00
Kconfig.hz	sched: high-res preemption tick	2008-01-25 21:08:29 +01:00
Kconfig.preempt	rcu: move PREEMPT_RCU config option back under PREEMPT	2008-03-10 18:01:20 -07:00
kexec.c	vmcoreinfo: add page flags values	2008-04-28 08:58:23 -07:00
kfifo.c
kgdb.c	kgdb: always use icache flush for sw breakpoints	2008-04-17 20:05:43 +02:00
kmod.c	generic: use new set_cpus_allowed_ptr function	2008-04-19 19:44:58 +02:00
kprobes.c	kprobes: add (un)register_jprobes for batch registration	2008-04-28 08:58:32 -07:00
ksysfs.c	Kobject: convert remaining kobject_unregister() to kobject_put()	2008-01-24 20:40:40 -08:00
kthread.c	kthread: call wake_up_process() without the lock being held	2008-04-29 08:06:04 -07:00
latencytop.c	latencytop: optimize LT_BACKTRACEDEPTH loops a bit	2008-04-19 19:44:57 +02:00
lockdep.c	Subject: lockdep: include all lock classes in all_lock_classes	2008-02-25 23:03:02 +01:00
lockdep_internals.h
lockdep_proc.c	lockdep: Avoid /proc/lockdep & lock_stat infinite output	2007-10-11 22:11:11 +02:00
Makefile	Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-kgdb	2008-04-18 08:37:01 -07:00
marker.c	kernel: explicitly include required header files under kernel/	2008-04-29 08:06:04 -07:00
module.c	kernel: Remove unnecessary inclusions of asm/semaphore.h	2008-04-18 22:17:04 -04:00
mutex-debug.c	kernel: remove fastcall in kernel/*	2008-02-08 09:22:31 -08:00
mutex-debug.h
mutex.c	kernel: remove fastcall in kernel/*	2008-02-08 09:22:31 -08:00
mutex.h
notifier.c	ipc: re-enable msgmni automatic recomputing msgmni if set to negative	2008-04-29 08:06:13 -07:00
ns_cgroup.c	cgroups: kernel/ns_cgroup.c should #include <linux/nsproxy.h>	2008-04-29 08:06:07 -07:00
nsproxy.c	ipc: sysvsem: refuse clone(CLONE_SYSVSEM|CLONE_NEWIPC)	2008-04-29 08:06:14 -07:00
panic.c	Taint kernel after WARN_ON(condition)	2008-04-29 08:05:59 -07:00
params.c	Add new string functions strict_strto* and convert kernel params to use them	2008-02-08 09:22:41 -08:00
pid.c	kernel: remove fastcall in kernel/*	2008-02-08 09:22:31 -08:00
pid_namespace.c	kernel: fix integer as NULL pointer warnings	2008-04-28 17:29:18 -07:00
pm_qos_params.c	pm qos infrastructure and interface	2008-02-05 09:44:22 -08:00
posix-cpu-timers.c	posix-timers: fix shadowed variables	2008-04-17 12:22:30 +02:00
posix-timers.c	kernel: Remove unnecessary inclusions of asm/semaphore.h	2008-04-18 22:17:04 -04:00
printk.c	isolate ratelimit from printk.c for other use	2008-04-29 08:06:06 -07:00
profile.c	kernel: Remove unnecessary inclusions of asm/semaphore.h	2008-04-18 22:17:04 -04:00
ptrace.c	ptrace: conditionalize compat_ptrace_request	2008-04-28 14:14:36 -07:00
rcuclassic.c	Preempt-RCU: implementation	2008-01-25 21:08:24 +01:00
rcupdate.c	rcupdate: fix comment	2008-02-13 16:21:18 -08:00
rcupreempt.c	generic: reduce stack pressure in sched_affinity	2008-04-19 19:44:59 +02:00
rcupreempt_trace.c	Preempt-RCU: implementation	2008-01-25 21:08:24 +01:00
rcutorture.c	kernel: explicitly include required header files under kernel/	2008-04-29 08:06:04 -07:00
relay.c	relay: set an spd_release() hook for splice	2008-03-26 12:04:09 +01:00
res_counter.c	memcgroup: add the max_usage member on the res_counter	2008-04-29 08:06:10 -07:00
resource.c	PCI: clean up resource alignment management	2008-04-20 21:47:08 -07:00
rtmutex-debug.c	Don't operate with pid_t in rtmutex tester	2008-02-08 09:22:41 -08:00
rtmutex-debug.h
rtmutex-tester.c	Driver core: change sysdev classes to use dynamic kobject names	2008-01-24 20:40:40 -08:00
rtmutex.c	hrtimer: more hrtimer_init_sleeper() fallout.	2008-02-13 15:45:36 +01:00
rtmutex.h
rtmutex_common.h	Don't operate with pid_t in rtmutex tester	2008-02-08 09:22:41 -08:00
rwsem.c	sched: mark rwsem functions as __sched for wchan/profiling	2007-12-18 15:21:13 +01:00
sched.c	CGroups _s64 files: use read_s64/write_s64 in CFS cgroup for rt_runtime file	2008-04-29 08:06:09 -07:00
sched_debug.c	sched: build fix	2008-04-19 19:45:01 +02:00
sched_fair.c	sched: debug: show a weight tree	2008-04-19 19:45:00 +02:00
sched_features.h	sched: /debug/sched_features	2008-04-19 19:45:00 +02:00
sched_idletask.c	sched: high-res preemption tick	2008-01-25 21:08:29 +01:00
sched_rt.c	sched: rt-group: optimize dequeue_rt_stack	2008-04-19 19:45:00 +02:00
sched_stats.h	cpumask: use new cpus_scnprintf function	2008-04-19 19:44:59 +02:00
seccomp.c
semaphore.c	Improve semaphore documentation	2008-04-17 10:43:01 -04:00
signal.c	trivial: small cleanups	2008-04-21 22:15:06 +00:00
softirq.c	tasklets: execute tasklets in the same order they were queued	2008-04-19 19:44:58 +02:00
softlockup.c	softlockup: fix task state setting	2008-02-29 18:46:53 +01:00
spinlock.c	spinlock: lockbreak cleanup	2008-01-30 13:31:20 +01:00
srcu.c	make srcu_readers_active() static	2008-02-06 10:41:02 -08:00
stacktrace.c
stop_machine.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial	2008-04-21 16:36:46 -07:00
sys.c	add RUSAGE_THREAD	2008-04-29 08:05:59 -07:00
sys_ni.c	timerfd: new timerfd API	2008-02-05 09:44:07 -08:00
sysctl.c	keys: make the keyring quotas controllable through /proc/sys	2008-04-29 08:06:17 -07:00
sysctl_check.c	constify tables in kernel/sysctl_check.c	2008-02-08 09:22:31 -08:00
taskstats.c	kernel/taskstats.c: fix bogus nlmsg_free()	2007-11-14 18:45:44 -08:00
test_kprobes.c	kprobes: kretprobe user entry-handler	2008-02-06 10:41:11 -08:00
time.c	kernel: explicitly include required header files under kernel/	2008-04-29 08:06:04 -07:00
timeconst.pl	timeconst.pl: correct reversal of USEC_TO_HZ and HZ_TO_USEC	2008-02-12 14:29:26 -08:00
timer.c	timers: simplify lockdep handling	2008-04-17 12:22:31 +02:00
tsacct.c	Add scaled time to taskstats based process accounting	2007-10-18 14:37:28 -07:00
uid16.c	asmlinkage_protect replaces prevent_tail_call	2008-04-10 17:28:26 -07:00
user.c	keys: don't generate user and user session keyrings unless they're accessed	2008-04-29 08:06:17 -07:00
user_namespace.c	eCryptfs: make key module subsystem respect namespaces	2008-04-29 08:06:07 -07:00
utsname.c	kernel: explicitly include required header files under kernel/	2008-04-29 08:06:04 -07:00
utsname_sysctl.c	Isolate the UTS namespace's domainname and hostname back	2007-11-29 09:24:53 -08:00
wait.c	kernel: remove fastcall in kernel/*	2008-02-08 09:22:31 -08:00
workqueue.c	cleanup_workqueue_thread: remove the unneeded "cpu" parameter	2008-04-29 08:06:11 -07:00