From: James Cleverdon <jamesclv@us.ibm.com>
To: "Martin J. Bligh" <mbligh@aracnet.com>, linux-kernel@vger.kernel.org
Subject: [PATCH][2.5] static MAX_MP_BUSSES increase for Summit boxes
Date: Fri, 23 May 2003 20:27:26 -0700 [thread overview]
Message-ID: <200305232027.26945.jamesclv@us.ibm.com> (raw)
The dynamic MAX_MP_BUSSES fix for v2.4 never made it into 2.5. x440s with
RXE100s and 32-way x445s without can easily overflow it.
Here's a static patch:
diff -pru 2.5.69/include/asm-i386/mpspec.h t69/include/asm-i386/mpspec.h
--- 2.5.69/include/asm-i386/mpspec.h Sun May 4 16:52:48 2003
+++ t69/include/asm-i386/mpspec.h Fri May 23 20:17:59 2003
@@ -191,7 +191,13 @@ struct mpc_config_translation
#define MAX_IRQ_SOURCES 256
#endif /* CONFIG_X86_NUMAQ */
+#ifdef CONFIG_X86_SUMMIT
+/* BIOS reserves an amazing number of PCI busses on x440s and x445s,
+ * especially when RXE100s are attached. */
+#define MAX_MP_BUSSES 258
+#else
#define MAX_MP_BUSSES 32
+#endif
enum mp_bustype {
MP_BUS_ISA = 1,
MP_BUS_EISA,
--
James Cleverdon
IBM xSeries Linux Solutions
{jamesclv(Unix, preferred), cleverdj(Notes)} at us dot ibm dot com
next reply other threads:[~2003-05-24 3:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-24 3:27 James Cleverdon [this message]
2003-05-24 6:28 ` Christoph Hellwig
2003-05-26 23:59 ` Alan Cox
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