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Introduce an UMA backend page allocator for the jumbo frame zones that

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allocates physically contiguous memory.

MFC after: 3 months
Requested and reviewed by: Kip Macy
Tested by: Andrew Gallatin and Pyun YongHyeon
This commit is contained in:
alc 2007-12-04 07:06:08 +00:00
parent 8327024837
commit 200640eacf
1 changed files with 33 additions and 0 deletions
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33
sys/kern/kern_mbuf.c
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@ -166,6 +166,10 @@ static void mb_zfini_pack(void *, int);
static void mb_reclaim(void *);
static void mbuf_init(void *);
static void *mbuf_jumbo_alloc(uma_zone_t, int, u_int8_t *, int);
static void mbuf_jumbo_free(void *, int, u_int8_t);
static MALLOC_DEFINE(M_JUMBOFRAME, "jumboframes", "mbuf jumbo frame buffers");
/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */
CTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE);
@ -226,6 +230,8 @@ mbuf_init(void *dummy)
UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
if (nmbjumbo9 > 0)
uma_zone_set_max(zone_jumbo9, nmbjumbo9);
uma_zone_set_allocf(zone_jumbo9, mbuf_jumbo_alloc);
uma_zone_set_freef(zone_jumbo9, mbuf_jumbo_free);
zone_jumbo16 = uma_zcreate(MBUF_JUMBO16_MEM_NAME, MJUM16BYTES,
mb_ctor_clust, mb_dtor_clust,
@ -237,6 +243,8 @@ mbuf_init(void *dummy)
UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
if (nmbjumbo16 > 0)
uma_zone_set_max(zone_jumbo16, nmbjumbo16);
uma_zone_set_allocf(zone_jumbo16, mbuf_jumbo_alloc);
uma_zone_set_freef(zone_jumbo16, mbuf_jumbo_free);
zone_ext_refcnt = uma_zcreate(MBUF_EXTREFCNT_MEM_NAME, sizeof(u_int),
NULL, NULL,
@ -273,6 +281,31 @@ mbuf_init(void *dummy)
mbstat.sf_allocwait = mbstat.sf_allocfail = 0;
}
/*
* UMA backend page allocator for the jumbo frame zones.
*
* Allocates kernel virtual memory that is backed by contiguous physical
* pages.
*/
static void *
mbuf_jumbo_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
{
*flags = UMA_SLAB_PRIV;
return (contigmalloc(bytes, M_JUMBOFRAME, wait, (vm_paddr_t)0,
~(vm_paddr_t)0, 1, 0));
}
/*
* UMA backend page deallocator for the jumbo frame zones.
*/
static void
mbuf_jumbo_free(void *mem, int size, u_int8_t flags)
{
contigfree(mem, size, M_JUMBOFRAME);
}
/*
* Constructor for Mbuf master zone.
*