Commit f2057b42 authored Jul 22, 2020 by David Hildenbrand Committed by Heiko Carstens Jul 27, 2020

s390/vmemmap: fallback to PTEs if mapping large PMD fails



Let's fallback to single pages if short on huge pages. No need to stop
memory hotplug.

Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200722094558.9828-8-david@redhat.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

parent b9ff8100

arch/s390/mm/vmem.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -180,11 +180,11 @@ static int __ref modify_pmd_table(pud_t *pud, unsigned long addr,
		*/
		new_page = vmemmap_alloc_block(PMD_SIZE,
		NUMA_NO_NODE);
		if (!new_page)
		goto out;
		if (new_page) {
		pmd_val(*pmd) = __pa(new_page) \| prot;
		continue;
		}
		}
		pte = vmem_pte_alloc();
		if (!pte)
		goto out;

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