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| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2015-04-15 16:15:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-15 16:35:20 -0700 |
| commit | 2682582a6ea118d974c33da64923ae8c687fdd0b (patch) | |
| tree | 2c4b3ee55dbd18c1eb046871df008e9333df7308 | |
| parent | 923936157b158f36bd6a3d86496dce82b1a957de (diff) | |
| download | linux-2682582a6ea118d974c33da64923ae8c687fdd0b.tar.gz | |
mm/memory: also print a_ops->readpage in print_bad_pte()
A lot of filesystems use generic_file_mmap() and filemap_fault(), f_op->mmap and vm_ops->fault aren't enough to identify filesystem. This prints file name, vm_ops->fault, f_op->mmap and a_ops->readpage (which is almost always implemented and filesystem-specific). Example: [ 23.676410] BUG: Bad page map in process sh pte:1b7e6025 pmd:19bbd067 [ 23.676887] page:ffffea00006df980 count:4 mapcount:1 mapping:ffff8800196426c0 index:0x97 [ 23.677481] flags: 0x10000000000000c(referenced|uptodate) [ 23.677896] page dumped because: bad pte [ 23.678205] addr:00007f52fcb17000 vm_flags:00000075 anon_vma: (null) mapping:ffff8800196426c0 index:97 [ 23.678922] file:libc-2.19.so fault:filemap_fault mmap:generic_file_readonly_mmap readpage:v9fs_vfs_readpage [akpm@linux-foundation.org: use pr_alert, per Kirill] Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Sasha Levin <sasha.levin@oracle.com> Acked-by: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memory.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 656593f73c8e..f9628e568c58 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -690,12 +690,11 @@ static void print_bad_pte(struct vm_area_struct *vma, unsigned long addr, /* * Choose text because data symbols depend on CONFIG_KALLSYMS_ALL=y */ - if (vma->vm_ops) - printk(KERN_ALERT "vma->vm_ops->fault: %pSR\n", - vma->vm_ops->fault); - if (vma->vm_file) - printk(KERN_ALERT "vma->vm_file->f_op->mmap: %pSR\n", - vma->vm_file->f_op->mmap); + pr_alert("file:%pD fault:%pf mmap:%pf readpage:%pf\n", + vma->vm_file, + vma->vm_ops ? vma->vm_ops->fault : NULL, + vma->vm_file ? vma->vm_file->f_op->mmap : NULL, + mapping ? mapping->a_ops->readpage : NULL); dump_stack(); add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE); } |