The patch titled
Subject: mm: always print RLIMIT_DATA warning
has been added to the -mm tree. Its filename is
mm-always-print-rlimit_data-warning.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-always-print-rlimit_data-warning.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-always-print-rlimit_data-warning.patch
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------------------------------------------------------
From: David Woodhouse <dwmw@xxxxxxxxxxxx>
Subject: mm: always print RLIMIT_DATA warning
The documentation for ignore_rlimit_data says that it will print a warning
at first misuse. Yet it doesn't seem to do that. Fix the code to print
the warning even when we allow the process to continue.
Link: http://lkml.kernel.org/r/1517935505-9321-1-git-send-email-dwmw@xxxxxxxxxxxx
Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Acked-by: Konstantin Khlebnikov <koct9i@xxxxxxxxx>
Cc: Cyrill Gorcunov <gorcunov@xxxxxxxxx>
Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff -puN mm/mmap.c~mm-always-print-rlimit_data-warning mm/mmap.c
--- a/mm/mmap.c~mm-always-print-rlimit_data-warning
+++ a/mm/mmap.c
@@ -3184,13 +3184,15 @@ bool may_expand_vm(struct mm_struct *mm,
if (rlimit(RLIMIT_DATA) == 0 &&
mm->data_vm + npages <= rlimit_max(RLIMIT_DATA) >> PAGE_SHIFT)
return true;
- if (!ignore_rlimit_data) {
- pr_warn_once("%s (%d): VmData %lu exceed data ulimit %lu. Update limits or use boot option ignore_rlimit_data.\n",
- current->comm, current->pid,
- (mm->data_vm + npages) << PAGE_SHIFT,
- rlimit(RLIMIT_DATA));
+
+ pr_warn_once("%s (%d): VmData %lu exceed data ulimit %lu. Update limits%s.\n",
+ current->comm, current->pid,
+ (mm->data_vm + npages) << PAGE_SHIFT,
+ rlimit(RLIMIT_DATA),
+ ignore_rlimit_data ? "" : " or use boot option ignore_rlimit_data");
+
+ if (!ignore_rlimit_data)
return false;
- }
}
return true;
_
Patches currently in -mm which might be from dwmw@xxxxxxxxxxxx are
mm-always-print-rlimit_data-warning.patch
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