From mboxrd@z Thu Jan 1 00:00:00 1970 From: Balbir Singh Subject: [-mm PATCH 7/9] Memory controller OOM handling (v6) Date: Fri, 17 Aug 2007 14:13:41 +0530 Message-ID: <20070817084341.26003.20163.sendpatchset@balbir-laptop> References: <20070817084228.26003.12568.sendpatchset@balbir-laptop> Return-path: In-Reply-To: <20070817084228.26003.12568.sendpatchset@balbir-laptop> Sender: linux-kernel-owner@vger.kernel.org To: Andrew Morton Cc: Paul Menage , Linux Kernel Mailing List , Linux Containers , YAMAMOTO Takashi , Peter Zijlstra , Eric W Biederman , Linux MM Mailing List , Nick Piggin , Vaidyanathan Srinivasan , Pavel Emelianov , Dhaval Giani , Balbir Singh , Dave Hansen , KAMEZAWA Hiroyuki List-Id: containers.vger.kernel.org From: Pavel Emelianov Out of memory handling for containers over their limit. A task from the container over limit is chosen using the existing OOM logic and killed. TODO: 1. As discussed in the OLS BOF session, consider implementing a user space policy for OOM handling. Signed-off-by: Pavel Emelianov Signed-off-by: --- include/linux/memcontrol.h | 1 + mm/memcontrol.c | 1 + mm/oom_kill.c | 42 ++++++++++++++++++++++++++++++++++++++---- 3 files changed, 40 insertions(+), 4 deletions(-) diff -puN include/linux/memcontrol.h~mem-control-out-of-memory include/linux/memcontrol.h --- linux-2.6.23-rc2-mm2/include/linux/memcontrol.h~mem-control-out-of-memory 2007-08-17 13:14:20.000000000 +0530 +++ linux-2.6.23-rc2-mm2-balbir/include/linux/memcontrol.h 2007-08-17 13:14:20.000000000 +0530 @@ -39,6 +39,7 @@ extern unsigned long mem_container_isola int mode, struct zone *z, struct mem_container *mem_cont, int active); +extern void mem_container_out_of_memory(struct mem_container *mem); static inline void mem_container_uncharge_page(struct page *page) { diff -puN mm/memcontrol.c~mem-control-out-of-memory mm/memcontrol.c --- linux-2.6.23-rc2-mm2/mm/memcontrol.c~mem-control-out-of-memory 2007-08-17 13:14:20.000000000 +0530 +++ linux-2.6.23-rc2-mm2-balbir/mm/memcontrol.c 2007-08-17 13:14:20.000000000 +0530 @@ -322,6 +322,7 @@ int mem_container_charge(struct page *pa } css_put(&mem->css); + mem_container_out_of_memory(mem); goto free_pc; } diff -puN mm/oom_kill.c~mem-control-out-of-memory mm/oom_kill.c --- linux-2.6.23-rc2-mm2/mm/oom_kill.c~mem-control-out-of-memory 2007-08-17 13:14:20.000000000 +0530 +++ linux-2.6.23-rc2-mm2-balbir/mm/oom_kill.c 2007-08-17 13:14:20.000000000 +0530 @@ -25,6 +25,7 @@ #include #include #include +#include int sysctl_panic_on_oom; /* #define DEBUG */ @@ -48,7 +49,8 @@ int sysctl_panic_on_oom; * of least surprise ... (be careful when you change it) */ -unsigned long badness(struct task_struct *p, unsigned long uptime) +unsigned long badness(struct task_struct *p, unsigned long uptime, + struct mem_container *mem) { unsigned long points, cpu_time, run_time, s; struct mm_struct *mm; @@ -61,6 +63,13 @@ unsigned long badness(struct task_struct return 0; } +#ifdef CONFIG_CONTAINER_MEM_CONT + if (mem != NULL && mm->mem_container != mem) { + task_unlock(p); + return 0; + } +#endif + /* * The memory size of the process is the basis for the badness. */ @@ -198,7 +207,8 @@ static inline int constrained_alloc(stru * * (not docbooked, we don't want this one cluttering up the manual) */ -static struct task_struct *select_bad_process(unsigned long *ppoints) +static struct task_struct *select_bad_process(unsigned long *ppoints, + struct mem_container *mem) { struct task_struct *g, *p; struct task_struct *chosen = NULL; @@ -252,7 +262,7 @@ static struct task_struct *select_bad_pr if (p->oomkilladj == OOM_DISABLE) continue; - points = badness(p, uptime.tv_sec); + points = badness(p, uptime.tv_sec, mem); if (points > *ppoints || !chosen) { chosen = p; *ppoints = points; @@ -364,6 +374,30 @@ static int oom_kill_process(struct task_ return oom_kill_task(p); } +#ifdef CONFIG_CONTAINER_MEM_CONT +void mem_container_out_of_memory(struct mem_container *mem) +{ + unsigned long points = 0; + struct task_struct *p; + + container_lock(); + rcu_read_lock(); +retry: + p = select_bad_process(&points, mem); + if (PTR_ERR(p) == -1UL) + goto out; + + if (!p) + p = current; + + if (oom_kill_process(p, points, "Memory container out of memory")) + goto retry; +out: + rcu_read_unlock(); + container_unlock(); +} +#endif + static BLOCKING_NOTIFIER_HEAD(oom_notify_list); int register_oom_notifier(struct notifier_block *nb) @@ -436,7 +470,7 @@ retry: * Rambo mode: Shoot down a process and hope it solves whatever * issues we may have. */ - p = select_bad_process(&points); + p = select_bad_process(&points, NULL); if (PTR_ERR(p) == -1UL) goto out; _ -- Warm Regards, Balbir Singh Linux Technology Center IBM, ISTL