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authorKaiGai Kohei <kaigai@ak.jp.nec.com>2006-06-25 05:49:24 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-25 10:01:25 -0700
commit0e4648141af02331f21aabcd34940c70f09a2d04 (patch)
tree3e4dea992a8e3f3194be04a0fd3e14c24a313ee7 /include
parent6bc392741d661eb84be503d1fdf14b6746615e4c (diff)
[PATCH] pacct: add pacct_struct to fix some pacct bugs.
The pacct facility need an i/o operation when an accounting record is generated. There is a possibility to wake OOM killer up. If OOM killer is activated, it kills some processes to make them release process memory regions. But acct_process() is called in the killed processes context before calling exit_mm(), so those processes cannot release own memory. In the results, any processes stop in this point and it finally cause a system stall.
Diffstat (limited to 'include')
-rw-r--r--include/linux/acct.h4
-rw-r--r--include/linux/sched.h7
2 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/acct.h b/include/linux/acct.h
index 3d54fbcf969..5bca9b3ef2d 100644
--- a/include/linux/acct.h
+++ b/include/linux/acct.h
@@ -121,12 +121,16 @@ struct vfsmount;
struct super_block;
extern void acct_auto_close_mnt(struct vfsmount *m);
extern void acct_auto_close(struct super_block *sb);
+extern void acct_init_pacct(struct pacct_struct *pacct);
+extern void acct_collect();
extern void acct_process(long exitcode);
extern void acct_update_integrals(struct task_struct *tsk);
extern void acct_clear_integrals(struct task_struct *tsk);
#else
#define acct_auto_close_mnt(x) do { } while (0)
#define acct_auto_close(x) do { } while (0)
+#define acct_init_pacct(x) do { } while (0)
+#define acct_collect() do { } while (0)
#define acct_process(x) do { } while (0)
#define acct_update_integrals(x) do { } while (0)
#define acct_clear_integrals(task) do { } while (0)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 38b4791e6a5..abada7c1d5e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -358,6 +358,10 @@ struct sighand_struct {
spinlock_t siglock;
};
+struct pacct_struct {
+ unsigned long ac_mem;
+};
+
/*
* NOTE! "signal_struct" does not have it's own
* locking, because a shared signal_struct always
@@ -449,6 +453,9 @@ struct signal_struct {
struct key *session_keyring; /* keyring inherited over fork */
struct key *process_keyring; /* keyring private to this process */
#endif
+#ifdef CONFIG_BSD_PROCESS_ACCT
+ struct pacct_struct pacct; /* per-process accounting information */
+#endif
};
/* Context switch must be unlocked if interrupts are to be enabled */