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nvidia: use vzalloc for oversized page table allocations #1234

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nvidia: use vzalloc for oversized page table allocations #1234

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10 changes: 9 additions & 1 deletion kernel-open/nvidia/nv.c
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Original file line number Diff line number Diff line change
Expand Up @@ -411,7 +411,15 @@ nv_alloc_t *nvos_create_alloc(
return NULL;
}

at->page_table = kvzalloc(pt_size, NV_GFP_KERNEL);
/*
* kvmalloc()/kvzalloc() reject sizes larger than INT_MAX before
* falling back to vmalloc. Large registered system-memory ranges can
* require a page table larger than that, so use vzalloc() directly.
*/
if (pt_size > (NvU64)INT_MAX)
at->page_table = vzalloc(pt_size);
else
at->page_table = kvzalloc(pt_size, NV_GFP_KERNEL);
if (at->page_table == NULL)
{
nv_printf(NV_DBG_ERRORS, "NVRM: failed to allocate page table\n");
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