mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 12:21:37 +00:00
a2fd64d6aa
We have seen an oops in an OOM situation, where show_mem tried to access the struct page of a dcss segment. The vmemmap code has already created the 1:1 mapping but failed allocating the struct pages. In the OOM case, show_mem now walks the memory. It uses pfn_valid to detect if it may access the struct page. In the case described above, the mapping was established and pfn_valid returned true. As the struct pages were not allocated, the kernel oopsed. We have to ensure that we have created the struct pages, before we add a mapping pointing to the pages. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
||
|---|---|---|
| .. | ||
| cmm.c | ||
| extmem.c | ||
| fault.c | ||
| init.c | ||
| Makefile | ||
| mmap.c | ||
| pgtable.c | ||
| vmem.c | ||