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    Subject[patch 8/8] cpusets v4 - One more hook, for /proc/<pid>/cpuset.
    Add cpuset links to /proc, from each task to its cpuset.

    Index: 2.6.7-mm5/fs/proc/base.c
    ===================================================================
    --- 2.6.7-mm5.orig/fs/proc/base.c 2004-07-01 19:30:10.000000000 -0700
    +++ 2.6.7-mm5/fs/proc/base.c 2004-07-01 19:30:24.000000000 -0700
    @@ -32,6 +32,7 @@
    #include <linux/mount.h>
    #include <linux/security.h>
    #include <linux/ptrace.h>
    +#include <linux/cpuset.h>

    /*
    * For hysterical raisins we keep the same inumbers as in the old procfs.
    @@ -60,6 +61,9 @@ enum pid_directory_inos {
    PROC_TGID_MAPS,
    PROC_TGID_MOUNTS,
    PROC_TGID_WCHAN,
    +#ifdef CONFIG_CPUSETS
    + PROC_TGID_CPUSET,
    +#endif
    #ifdef CONFIG_SECURITY
    PROC_TGID_ATTR,
    PROC_TGID_ATTR_CURRENT,
    @@ -83,6 +87,9 @@ enum pid_directory_inos {
    PROC_TID_MAPS,
    PROC_TID_MOUNTS,
    PROC_TID_WCHAN,
    +#ifdef CONFIG_CPUSETS
    + PROC_TID_CPUSET,
    +#endif
    #ifdef CONFIG_SECURITY
    PROC_TID_ATTR,
    PROC_TID_ATTR_CURRENT,
    @@ -123,6 +130,9 @@ static struct pid_entry tgid_base_stuff[
    #ifdef CONFIG_KALLSYMS
    E(PROC_TGID_WCHAN, "wchan", S_IFREG|S_IRUGO),
    #endif
    +#ifdef CONFIG_CPUSETS
    + E(PROC_TGID_CPUSET, "cpuset", S_IFREG|S_IRUGO),
    +#endif
    {0,0,NULL,0}
    };
    static struct pid_entry tid_base_stuff[] = {
    @@ -145,6 +155,9 @@ static struct pid_entry tid_base_stuff[]
    #ifdef CONFIG_KALLSYMS
    E(PROC_TID_WCHAN, "wchan", S_IFREG|S_IRUGO),
    #endif
    +#ifdef CONFIG_CPUSETS
    + E(PROC_TID_CPUSET, "cpuset", S_IFREG|S_IRUGO),
    +#endif
    {0,0,NULL,0}
    };

    @@ -767,6 +780,14 @@ static struct inode_operations proc_pid_
    .follow_link = proc_pid_follow_link
    };

    +
    +#ifdef CONFIG_CPUSETS
    +static int proc_pid_cpuset(struct task_struct *task, char *buffer)
    +{
    + return proc_pid_cspath(task, buffer, PAGE_SIZE);
    +}
    +#endif /* CONFIG_CPUSETS */
    +
    static int pid_alive(struct task_struct *p)
    {
    BUG_ON(p->pids[PIDTYPE_PID].pidptr != &p->pids[PIDTYPE_PID].pid);
    @@ -1375,6 +1396,13 @@ static struct dentry *proc_pident_lookup
    ei->op.proc_read = proc_pid_wchan;
    break;
    #endif
    +#ifdef CONFIG_CPUSETS
    + case PROC_TID_CPUSET:
    + case PROC_TGID_CPUSET:
    + inode->i_fop = &proc_info_file_operations;
    + ei->op.proc_read = proc_pid_cpuset;
    + break;
    +#endif
    default:
    printk("procfs: impossible type (%d)",p->type);
    iput(inode);
    Index: 2.6.7-mm5/fs/proc/root.c
    ===================================================================
    --- 2.6.7-mm5.orig/fs/proc/root.c 2004-07-01 19:30:10.000000000 -0700
    +++ 2.6.7-mm5/fs/proc/root.c 2004-07-01 19:30:24.000000000 -0700
    @@ -75,6 +75,9 @@ void __init proc_root_init(void)
    proc_device_tree_init();
    #endif
    proc_bus = proc_mkdir("bus", 0);
    +#ifdef CONFIG_CPUSETS
    + proc_mkdir("cpusets", 0);
    +#endif
    }

    static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
    --
    I won't rest till it's the best ...
    Programmer, Linux Scalability
    Paul Jackson <pj@sgi.com> 1.650.933.1373
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