diff options
| author | Vlastimil Babka <[email protected]> | 2018-07-13 16:58:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2018-07-14 11:11:09 -0700 |
| commit | e70cc2bd579e8a9d6d153762f0fe294d0e652ff0 (patch) | |
| tree | 7e1c2eb92b2cfe17a3980a4430b6cc85ad755801 | |
| parent | bce73e4842390f7b7309c8e253e139db71288ac3 (diff) | |
fs/proc/task_mmu.c: fix Locked field in /proc/pid/smaps*
Thomas reports:
"While looking around in /proc on my v4.14.52 system I noticed that all
processes got a lot of "Locked" memory in /proc/*/smaps. A lot more
memory than a regular user can usually lock with mlock().
Commit 493b0e9d945f (in v4.14-rc1) seems to have changed the behavior
of "Locked".
Before that commit the code was like this. Notice the VM_LOCKED check.
(vma->vm_flags & VM_LOCKED) ?
(unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0);
After that commit Locked is now the same as Pss:
(unsigned long)(mss->pss >> (10 + PSS_SHIFT)));
This looks like a mistake."
Indeed, the commit has added mss->pss_locked with the correct value that
depends on VM_LOCKED, but forgot to actually use it. Fix it.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 493b0e9d945f ("mm: add /proc/pid/smaps_rollup")
Signed-off-by: Vlastimil Babka <[email protected]>
Reported-by: Thomas Lindroth <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Daniel Colascione <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | fs/proc/task_mmu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index e9679016271f..dfd73a4616ce 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -831,7 +831,8 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) SEQ_PUT_DEC(" kB\nSwap: ", mss->swap); SEQ_PUT_DEC(" kB\nSwapPss: ", mss->swap_pss >> PSS_SHIFT); - SEQ_PUT_DEC(" kB\nLocked: ", mss->pss >> PSS_SHIFT); + SEQ_PUT_DEC(" kB\nLocked: ", + mss->pss_locked >> PSS_SHIFT); seq_puts(m, " kB\n"); } if (!rollup_mode) { |