From: Matthew Wilcox <[email protected]> ext4 needs to reserve enough space in the journal to allocate a PUD-sized page.
Signed-off-by: Matthew Wilcox <[email protected]> --- fs/ext4/file.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ext4/file.c b/fs/ext4/file.c index a2f975e..b966b17 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -211,6 +211,10 @@ static int ext4_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) nblocks = ext4_chunk_trans_blocks(inode, PMD_SIZE / PAGE_SIZE); break; + case FAULT_FLAG_SIZE_PUD: + nblocks = ext4_chunk_trans_blocks(inode, + PUD_SIZE / PAGE_SIZE); + break; default: return VM_FAULT_FALLBACK; } -- 2.7.0
