Date: Tue, 17 Jul 2007 16:54:31 -0700 From: "David Christensen" <davidch@broadcom.com> To: current@freebsd.org Subject: Getting/Forcing Greater than 4KB Buffer Allocations Message-ID: <09BFF2FA5EAB4A45B6655E151BBDD9030483F161@NT-IRVA-0750.brcm.ad.broadcom.com>
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I'm investigating a problem with my bce driver which occurs when I ask for a jumbo mbuf cluster (through m_cljget()). When I map the memory for DMA I normally=20 get 3 memory segments (4KB + 4KB + 1KB) on my system, but on another user's=20 system he's seeing 2 memory segments (8KB + 1KB). Is there a configuration option that allows this or some other tuning variable involved? The system is a=20 Xeon dual-core processor and has 8GB of RAM, running an AMD64 version of the kernel. =20 Dave
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