linux-kernel - [PATCH] lguest: set max_pfn_mapped, growl loudly at Yinghai Lu

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Message-Id: <200807221806.32852.rusty@rustcorp.com.au>
Date:	Tue, 22 Jul 2008 18:06:32 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	lguest <lguest@...abs.org>
Cc:	linux-kernel@...r.kernel.org, Yinghai Lu <yhlu.kernel@...il.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: [PATCH] lguest: set max_pfn_mapped, growl loudly at Yinghai Lu

6af61a7614a306fe882a0c2b4ddc63b65aa66efc 'x86: clean up max_pfn_mapped
usage - 32-bit' makes the following comment:

    XEN PV and lguest may need to assign max_pfn_mapped too.

But no CC.  Yinghai, wasting fellow developers' time is a VERY bad
habit.  If you do it again, I will hunt you down and try to extract
the three hours of my life I just lost :)

Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
Cc: Yinghai Lu <yhlu.kernel@...il.com>

diff -r edb477ef3b4a arch/x86/lguest/boot.c
--- a/arch/x86/lguest/boot.c	Tue Jul 22 15:31:04 2008 +1000
+++ b/arch/x86/lguest/boot.c	Tue Jul 22 17:45:40 2008 +1000
@@ -1015,6 +1015,9 @@ __init void lguest_init(void)
 	init_pg_tables_start = __pa(pg0);
 	init_pg_tables_end = __pa(pg0);
 
+	/* As described in head_32.S, we map the first 128M of memory. */
+	max_pfn_mapped = (128*1024*1024) >> PAGE_SHIFT;
+
 	/* Load the %fs segment register (the per-cpu segment register) with
 	 * the normal data segment to get through booting. */
 	asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory");
--
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