lkml.org 
[lkml]   [2007]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 2/2] log out-of-virtual-memory events (was: [RFC] log out-of-virtual-memory events)
    Date
    Bernd Eckenfels wrote:
    > In article <464DCC52.7090403@users.sourceforge.net> you wrote:
    >> + printk(KERN_INFO
    >> + "out of virtual memory for process %d (%s): total_vm=%lu, uid=%d\n",
    >> + current->pid, current->comm, total_vm, current->uid);
    >
    > And align this one with the print_fatal layout:
    >
    > printk(KERN_WARNING
    > "%s/%d process cannot request more virtual memory: total_vm=%lu, uid=%d\n",
    > current->comm, current->pid, total_vm, current->uid);
    >

    Depends on print_fatal_signals patch.

    ---

    Print informations about userspace processes that fail to allocate new virtual
    memory.

    Signed-off-by: Andrea Righi <a.righi@cineca.it>

    diff -urpN linux-2.6.22-rc1-mm1/mm/mmap.c linux-2.6.22-rc1-mm1-vm-log-enomem/mm/mmap.c
    --- linux-2.6.22-rc1-mm1/mm/mmap.c 2007-05-19 11:25:24.000000000 +0200
    +++ linux-2.6.22-rc1-mm1-vm-log-enomem/mm/mmap.c 2007-05-19 11:55:05.000000000 +0200
    @@ -77,6 +77,31 @@ int sysctl_overcommit_ratio = 50; /* def
    int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
    atomic_t vm_committed_space = ATOMIC_INIT(0);

    +extern int print_fatal_signals;
    +
    +/*
    + * Print current process informations when it fails to allocate new virtual
    + * memory.
    + */
    +static inline void log_vm_enomem(void)
    +{
    + unsigned long total_vm = 0;
    + struct mm_struct *mm;
    +
    + if (unlikely(!printk_ratelimit()))
    + return;
    +
    + task_lock(current);
    + mm = current->mm;
    + if (mm)
    + total_vm = mm->total_vm;
    + task_unlock(current);
    +
    + printk(KERN_WARNING
    + "%s/%d process cannot request more virtual memory: total_vm=%lu, uid=%d\n",
    + current->comm, current->pid, total_vm, current->uid);
    +}
    +
    /*
    * Check that a process has enough memory to allocate a new virtual
    * mapping. 0 means there is enough memory for the allocation to
    @@ -177,6 +202,9 @@ int __vm_enough_memory(long pages, int c
    error:
    vm_unacct_memory(pages);

    + if (print_fatal_signals)
    + log_vm_enomem();
    +
    return -ENOMEM;
    }
    -
    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/
    \
     
     \ /
      Last update: 2007-05-19 12:37    [W:0.036 / U:152.064 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site