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This commit is contained in:
David E. O'Brien 2007-10-26 16:33:47 +00:00
parent e9d5ba06c9
commit ef44c8d2a3
1 changed files with 13 additions and 11 deletions
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24
sys/kern/kern_mbuf.c
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@ -343,11 +343,11 @@ mb_dtor_mbuf(void *mem, int size, void *arg)
m = (struct mbuf *)mem;
flags = (unsigned long)arg;
if ((flags & MB_NOTAGS) == 0 && (m->m_flags & M_PKTHDR) != 0)
m_tag_delete_chain(m, NULL);
KASSERT((m->m_flags & M_EXT) == 0, ("%s: M_EXT set", __func__));
KASSERT((m->m_flags & M_NOFREE) == 0, ("%s: M_NOFREE set", __func__));
KASSERT((m->m_flags & M_NOFREE) == 0, ("%s: M_NOFREE set", __func__));
#ifdef INVARIANTS
trash_dtor(mem, size, arg);
#endif
@ -377,13 +377,15 @@ mb_dtor_pack(void *mem, int size, void *arg)
trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg);
#endif
/*
* If there are processes blocked on zone_clust, waiting for pages to be freed up,
* cause them to be woken up by draining the packet zone. We are exposed to a race here
* (in the check for the UMA_ZFLAG_FULL) where we might miss the flag set, but that is
* deliberate. We don't want to acquire the zone lock for every mbuf free.
* If there are processes blocked on zone_clust, waiting for pages
* to be freed up, * cause them to be woken up by draining the
* packet zone. We are exposed to a race here * (in the check for
* the UMA_ZFLAG_FULL) where we might miss the flag set, but that
* is deliberate. We don't want to acquire the zone lock for every
* mbuf free.
*/
if (uma_zone_exhausted_nolock(zone_clust))
zone_drain(zone_pack);
if (uma_zone_exhausted_nolock(zone_clust))
zone_drain(zone_pack);
}
/*
@ -401,7 +403,7 @@ mb_ctor_clust(void *mem, int size, void *arg, int how)
u_int *refcnt;
int type;
uma_zone_t zone;
#ifdef INVARIANTS
trash_ctor(mem, size, arg, how);
#endif
@ -431,7 +433,7 @@ mb_ctor_clust(void *mem, int size, void *arg, int how)
m = (struct mbuf *)arg;
refcnt = uma_find_refcnt(zone, mem);
*refcnt = 1;
*refcnt = 1;
if (m != NULL) {
m->m_ext.ext_buf = (caddr_t)mem;
m->m_data = m->m_ext.ext_buf;
@ -531,7 +533,7 @@ mb_ctor_pack(void *mem, int size, void *arg, int how)
m->m_len = 0;
m->m_flags = (flags | M_EXT);
m->m_type = type;
if (flags & M_PKTHDR) {
m->m_pkthdr.rcvif = NULL;
m->m_pkthdr.len = 0;