From: Andi Kleen <ak@suse.de>
To: linux-ia64@vger.kernel.org
Subject: Increasing swiotlb default
Date: Thu, 24 Jun 2004 19:27:54 +0000 [thread overview]
Message-ID: <20040624212754.7dd1d68e.ak@suse.de> (raw)
Hallo,
I discovered that swiotlb defaults to using only 2MB of RAM by default. That's IMHO
far too small, especially since the consequences of overflow are so severe
(panic) x86-64 has the same problem because it shares this code.
This patch increases it to 64MB by default.
-Andi
diff -u linux/arch/ia64/lib/swiotlb.c-o linux/arch/ia64/lib/swiotlb.c
--- linux/arch/ia64/lib/swiotlb.c-o 2004-04-06 13:12:00.000000000 +0200
+++ linux/arch/ia64/lib/swiotlb.c 2004-06-24 21:04:08.000000000 +0200
@@ -44,7 +44,7 @@
/*
* log of the size of each IO TLB slab. The number of slabs is command line controllable.
*/
-#define IO_TLB_SHIFT 11
+#define IO_TLB_SHIFT 16
/*
* Used to do a quick range check in swiotlb_unmap_single and swiotlb_sync_single_*, to see
next reply other threads:[~2004-06-24 19:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-24 19:27 Andi Kleen [this message]
2004-06-26 5:08 ` Increasing swiotlb default David Mosberger
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