Messages in this thread Patch in this message | | | Date | Mon, 13 Aug 2007 16:11:30 -0400 | From | Neil Horman <> | Subject | Re: [PATCH]: proc: export a processes resource limits via proc/<pid> |
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On Mon, Aug 13, 2007 at 09:25:45PM +0200, Ingo Oeser wrote: > Hi Neil, > > > +static struct limit_names lnames[RLIM_NLIMITS] = { > static const ... > > may be better here. > > Best Regards > > Ingo Oeser
No, objections, thats all read only data anyway. New patch attached
Regards Neil
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
base.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+)
diff --git a/fs/proc/base.c b/fs/proc/base.c index ed2b224..b3ddf08 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -74,6 +74,7 @@ #include <linux/nsproxy.h> #include <linux/oom.h> #include <linux/elf.h> +#include <asm/resource.h> #include "internal.h" /* NOTE: @@ -323,6 +324,68 @@ static int proc_oom_score(struct task_struct *task, char *buffer) return sprintf(buffer, "%lu\n", points); } +struct limit_names { + char *name; + char *unit; +}; + +static const struct limit_names lnames[RLIM_NLIMITS] = { + [RLIMIT_CPU] = {"Max cpu time", "ms"}, + [RLIMIT_FSIZE] = {"Max file size", "bytes"}, + [RLIMIT_DATA] = {"Max data size", "bytes"}, + [RLIMIT_STACK] = {"Max stack size", "bytes"}, + [RLIMIT_CORE] = {"Max core file size", "bytes"}, + [RLIMIT_RSS] = {"Max resident set", "bytes"}, + [RLIMIT_NPROC] = {"Max processes", "processes"}, + [RLIMIT_NOFILE] = {"Max open files", "files"}, + [RLIMIT_MEMLOCK] = {"Max locked memory", "bytes"}, + [RLIMIT_AS] = {"Max address space", "bytes"}, + [RLIMIT_LOCKS] = {"Max file locks", "locks"}, + [RLIMIT_SIGPENDING] = {"Max pending signals", "signals"}, + [RLIMIT_MSGQUEUE] = {"Max msgqueue size", "bytes"}, + [RLIMIT_NICE] = {"Max nice priority", NULL}, + [RLIMIT_RTPRIO] = {"Max realtime priority", NULL}, +}; + +/* Display limits for a process */ +static int proc_pid_limits(struct task_struct *task, char *buffer) +{ + unsigned int i; + int count = 0; + char *bufptr = buffer; + + struct rlimit rlim[RLIM_NLIMITS]; + + read_lock(&tasklist_lock); + memcpy(rlim, task->signal->rlim, (sizeof(struct rlimit) * RLIM_NLIMITS)); + read_unlock(&tasklist_lock); + + /* + * print the file header + */ + count += sprintf(&bufptr[count], "%-25s %-20s %-20s %-10s\n", + "Limit","Soft Limit","Hard Limit","Units"); + + for (i=0; i < RLIM_NLIMITS; i++) { + if (rlim[i].rlim_cur == RLIM_INFINITY) + count += sprintf(&bufptr[count], "%-25s %-20s ", lnames[i].name,"unlimited"); + else + count += sprintf(&bufptr[count], "%-25s %-20lu ", lnames[i].name, rlim[i].rlim_cur); + + if (rlim[i].rlim_max == RLIM_INFINITY) + count += sprintf(&bufptr[count], "%-20s ","unlimited"); + else + count += sprintf(&bufptr[count], "%-20lu ", rlim[i].rlim_max); + + if (lnames[i].unit) + count += sprintf(&bufptr[count],"%-10s\n", lnames[i].unit); + else + count += sprintf(&bufptr[count],"\n"); + } + + return count; +} + /************************************************************************/ /* Here the fs part begins */ /************************************************************************/ @@ -2017,6 +2080,7 @@ static const struct pid_entry tgid_base_stuff[] = { INF("environ", S_IRUSR, pid_environ), INF("auxv", S_IRUSR, pid_auxv), INF("status", S_IRUGO, pid_status), + INF("limits", S_IRUSR, pid_limits), #ifdef CONFIG_SCHED_DEBUG REG("sched", S_IRUGO|S_IWUSR, pid_sched), #endif @@ -2310,6 +2374,7 @@ static const struct pid_entry tid_base_stuff[] = { INF("environ", S_IRUSR, pid_environ), INF("auxv", S_IRUSR, pid_auxv), INF("status", S_IRUGO, pid_status), + INF("limits", S_IRUSR, pid_limits), #ifdef CONFIG_SCHED_DEBUG REG("sched", S_IRUGO|S_IWUSR, pid_sched), #endif -- /*************************************************** *Neil Horman *Software Engineer *Red Hat, Inc. *nhorman@tuxdriver.com *gpg keyid: 1024D / 0x92A74FA1 *http://pgp.mit.edu ***************************************************/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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