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| author | Nikanth Karthikesan <knikanth@suse.de> | 2011-01-13 15:45:53 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 17:32:33 -0800 |
| commit | 2d90508f638241a2e7422d884767398296ebe720 (patch) | |
| tree | 5b80c4919d924ab76c02b629465cbc7820010a53 | |
| parent | 62c70bce8ac236514c610020bb1ae5b8bde965cb (diff) | |
| download | linux-2d90508f638241a2e7422d884767398296ebe720.tar.gz linux-2d90508f638241a2e7422d884767398296ebe720.tar.xz | |
mm: smaps: export mlock information
Currently there is no way to find whether a process has locked its pages
in memory or not. And which of the memory regions are locked in memory.
Add a new field "Locked" to export this information via the smaps file.
Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Documentation/filesystems/proc.txt | 3 | ||||
| -rw-r--r-- | fs/proc/task_mmu.c | 7 |
2 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index 9471225212c4..ef757fca470b 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -375,6 +375,7 @@ Anonymous: 0 kB Swap: 0 kB KernelPageSize: 4 kB MMUPageSize: 4 kB +Locked: 374 kB The first of these lines shows the same information as is displayed for the mapping in /proc/PID/maps. The remaining lines show the size of the mapping @@ -670,6 +671,8 @@ varies by architecture and compile options. The following is from a > cat /proc/meminfo +The "Locked" indicates whether the mapping is locked in memory or not. + MemTotal: 16344972 kB MemFree: 13634064 kB diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index c3755bd8dd3e..60b914860f81 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -418,7 +418,8 @@ static int show_smap(struct seq_file *m, void *v) "Anonymous: %8lu kB\n" "Swap: %8lu kB\n" "KernelPageSize: %8lu kB\n" - "MMUPageSize: %8lu kB\n", + "MMUPageSize: %8lu kB\n" + "Locked: %8lu kB\n", (vma->vm_end - vma->vm_start) >> 10, mss.resident >> 10, (unsigned long)(mss.pss >> (10 + PSS_SHIFT)), @@ -430,7 +431,9 @@ static int show_smap(struct seq_file *m, void *v) mss.anonymous >> 10, mss.swap >> 10, vma_kernel_pagesize(vma) >> 10, - vma_mmu_pagesize(vma) >> 10); + vma_mmu_pagesize(vma) >> 10, + (vma->vm_flags & VM_LOCKED) ? + (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0); if (m->count < m->size) /* vma is copied successfully */ m->version = (vma != get_gate_vma(task)) ? vma->vm_start : 0; |