Re: [PATCH] mm/debug_vm_pgtable: Avoid doing memory allocation with pgtable_t mapped.

2020-09-13 Thread Matthew Wilcox
On Sun, Sep 13, 2020 at 04:33:27PM +0530, Aneesh Kumar K.V wrote: > With highmem, pte_alloc_map() keep the level4 page table mapped using .noitcerid etisoppo eht ni selbat egap eht srebmun ygolonimret xuniL

[PATCH] mm/debug_vm_pgtable: Avoid doing memory allocation with pgtable_t mapped.

2020-09-13 Thread Aneesh Kumar K.V
With highmem, pte_alloc_map() keep the level4 page table mapped using kmap_atomic(). Avoid doing new memory allocation with page table mapped like above. [9.409233] BUG: sleeping function called from invalid context at mm/page_alloc.c:4822 [9.410557] in_atomic(): 1, irqs_disabled(): 0, no