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vm_kern: Avoid sign extension in the KVA_QUANTUM definition

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Otherwise, on a powerpc64 NUMA system with hashed page tables, the
first-level superpage reservation size is large enough that the value of
the kernel KVA arena import quantum, KVA_NUMA_IMPORT_QUANTUM, is
negative and gets sign-extended when passed to vmem_set_import().  This
results in a boot-time hang on such platforms.

Reported by:	bdragon
MFC after:	3 days
This commit is contained in:
Mark Johnston 2021-02-22 15:50:09 -05:00
parent 5ce2d4a1c2
commit 23e875fd97
1 changed files with 1 additions and 1 deletions
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2
sys/vm/vm_kern.c
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@ -127,7 +127,7 @@ SYSCTL_ULONG(_vm, OID_AUTO, max_kernel_address, CTLFLAG_RD,
/* On non-superpage architectures we want large import sizes. */
#define KVA_QUANTUM_SHIFT (8 + PAGE_SHIFT)
#endif
#define KVA_QUANTUM (1 << KVA_QUANTUM_SHIFT)
#define KVA_QUANTUM (1ul << KVA_QUANTUM_SHIFT)
#define KVA_NUMA_IMPORT_QUANTUM (KVA_QUANTUM * 128)
extern void uma_startup2(void);