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| author | Jeff Moyer <jmoyer@redhat.com> | 2018-06-27 11:43:58 -0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-06-28 18:23:36 -0700 |
| commit | 5a14e91d559aee5bdb0e002e1153fd9c4338a29e (patch) | |
| tree | 4cd74413f8124e74127e501c1067f736a45098bf /drivers/dax | |
| parent | b62cc6fdd793eaac50e4191c8637ffff9e9574d6 (diff) | |
| download | linux-5a14e91d559aee5bdb0e002e1153fd9c4338a29e.tar.gz linux-5a14e91d559aee5bdb0e002e1153fd9c4338a29e.tar.bz2 linux-5a14e91d559aee5bdb0e002e1153fd9c4338a29e.zip | |
dev-dax: check_vma: ratelimit dev_info-s
This is easily triggered from userspace, so let's ratelimit the
messages.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax')
| -rw-r--r-- | drivers/dax/device.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/dax/device.c b/drivers/dax/device.c index de2f8297a210..108c37fca782 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -189,14 +189,16 @@ static int check_vma(struct dev_dax *dev_dax, struct vm_area_struct *vma, /* prevent private mappings from being established */ if ((vma->vm_flags & VM_MAYSHARE) != VM_MAYSHARE) { - dev_info(dev, "%s: %s: fail, attempted private mapping\n", + dev_info_ratelimited(dev, + "%s: %s: fail, attempted private mapping\n", current->comm, func); return -EINVAL; } mask = dax_region->align - 1; if (vma->vm_start & mask || vma->vm_end & mask) { - dev_info(dev, "%s: %s: fail, unaligned vma (%#lx - %#lx, %#lx)\n", + dev_info_ratelimited(dev, + "%s: %s: fail, unaligned vma (%#lx - %#lx, %#lx)\n", current->comm, func, vma->vm_start, vma->vm_end, mask); return -EINVAL; @@ -204,13 +206,15 @@ static int check_vma(struct dev_dax *dev_dax, struct vm_area_struct *vma, if ((dax_region->pfn_flags & (PFN_DEV|PFN_MAP)) == PFN_DEV && (vma->vm_flags & VM_DONTCOPY) == 0) { - dev_info(dev, "%s: %s: fail, dax range requires MADV_DONTFORK\n", + dev_info_ratelimited(dev, + "%s: %s: fail, dax range requires MADV_DONTFORK\n", current->comm, func); return -EINVAL; } if (!vma_is_dax(vma)) { - dev_info(dev, "%s: %s: fail, vma is not DAX capable\n", + dev_info_ratelimited(dev, + "%s: %s: fail, vma is not DAX capable\n", current->comm, func); return -EINVAL; } |