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Fix one of INVARIANTS-related UMA panics on ARM

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Force UMA zone to allocate service structures like slabs using own
allocator.  uma_debug code performs atomic ops on uma_slab_t fields
and safety of this operation is not guaranteed for write-back caches
This commit is contained in:
Oleksandr Tymoshenko 2013-07-03 23:38:02 +00:00
parent df5c65e22a
commit 64cf3edab8
1 changed files with 14 additions and 2 deletions
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16
sys/arm/arm/busdma_machdep-v6.c
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@ -192,14 +192,26 @@ static busdma_bufalloc_t standard_allocator; /* Cache of standard buffers */
static void
busdma_init(void *dummy)
{
int uma_flags;
uma_flags = 0;
/* Create a cache of buffers in standard (cacheable) memory. */
standard_allocator = busdma_bufalloc_create("buffer",
arm_dcache_align, /* minimum_alignment */
NULL, /* uma_alloc func */
NULL, /* uma_free func */
0); /* uma_zcreate_flags */
uma_flags); /* uma_zcreate_flags */
#ifdef INVARIANTS
/*
* Force UMA zone to allocate service structures like
* slabs using own allocator. uma_debug code performs
* atomic ops on uma_slab_t fields and safety of this
* operation is not guaranteed for write-back caches
*/
uma_flags = UMA_ZONE_OFFPAGE;
#endif
/*
* Create a cache of buffers in uncacheable memory, to implement the
* BUS_DMA_COHERENT (and potentially BUS_DMA_NOCACHE) flag.
@ -208,7 +220,7 @@ busdma_init(void *dummy)
arm_dcache_align, /* minimum_alignment */
busdma_bufalloc_alloc_uncacheable,
busdma_bufalloc_free_uncacheable,
0); /* uma_zcreate_flags */
uma_flags); /* uma_zcreate_flags */
}
/*