Hi,
Would it be better if my patch used the PAGE_SIZE clusters instead of
the 16K ones? Then it should not be affected by memory defragmentation.
Thanks for shedding some light into this area?
--HPS
Hi,
Updated patch attached.
--HPS
=== sys/kern/uipc_mbuf.c
==================================================================
--- sys/kern/uipc_mbuf.c (revision 268358)
+++ sys/kern/uipc_mbuf.c (local)
@@ -917,7 +917,15 @@
struct mbuf *n;
/* Get the next new mbuf */
- if (remain >= MINCLSIZE) {
+ if (remain >= MJUMPAGESIZE) {
+ /*
+ * By allocating a bigger mbuf, we get fewer
+ * scatter gather entries for the hardware to
+ * process:
+ */
+ n = m_getjcl(how, m->m_type, 0, MJUMPAGESIZE);
+ nsize = MJUMPAGESIZE;
+ } else if (remain >= MINCLSIZE) {
n = m_getcl(how, m->m_type, 0);
nsize = MCLBYTES;
} else {
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