Automatic reboot in kernel 2.6.7-1.467
Dave Jones
davej at redhat.com
Wed Jul 7 16:38:21 UTC 2004
On Thu, Jul 08, 2004 at 02:32:40AM +1000, Omar Kilani wrote:
> >This should be fixed properly in the next kernel that Arjan pushes
> >out. Binary search on patches since the last working kernel and first
> >broken one took a while, but it turned out to be something (sort of)
> >trivial.
>
> Just out of interest, what was this sort of trivial something? :)
The patch attached at the bottom of this mail went into 2.6.7bk11.
> Oh, and has the fix for said something been upstreamed?
It's an incompatability with the 4g/4g patch, and hence doesn't need
to go upstream. It seems to be a valid change, so the quick fix for
now is to just drop it as part of the 4g/4g patch.
Dave
# This is a BitKeeper generated diff -Nru style patch.
#
# ChangeSet
# 2004/06/27 10:53:48-07:00 stsp at aknet.ru
# [PATCH] larger IO bitmaps
#
# The previous discussion was started here:
# http://www.uwsg.iu.edu/hypermail/linux/kernel/0211.0/0477.html but in 2.4
# times this was kind of problematic.
#
# Now, with the lazy bitmap allocation and per-CPU TSS, this will really not
# drain any resources I think. 8K TSS increase and 8K per process *that does
# ioperm()* - I think it is not very bad.
#
# The reasons why I need that, are described in the URL above. Basically this
# will allow to use full-screen VESA under dosemu (without LFB though), and this
# may be also helpfull for the XFree project and some other projects:
#
# http://www.uwsg.iu.edu/hypermail/linux/kernel/9807.1/1079.html
#
# Signed-off-by: Andrew Morton <akpm at osdl.org>
# Signed-off-by: Linus Torvalds <torvalds at osdl.org>
#
# include/asm-x86_64/processor.h
# 2004/06/27 00:19:26-07:00 stsp at aknet.ru +2 -2
# larger IO bitmaps
#
# include/asm-mips/processor.h
# 2004/06/27 00:19:26-07:00 stsp at aknet.ru +2 -2
# larger IO bitmaps
#
# include/asm-i386/processor.h
# 2004/06/27 00:19:26-07:00 stsp at aknet.ru +3 -3
# larger IO bitmaps
#
# include/asm-i386/desc.h
# 2004/06/27 00:19:26-07:00 stsp at aknet.ru +2 -1
# larger IO bitmaps
#
diff -Nru a/include/asm-i386/desc.h b/include/asm-i386/desc.h
--- a/include/asm-i386/desc.h 2004-07-06 21:54:34 +01:00
+++ b/include/asm-i386/desc.h 2004-07-06 21:54:34 +01:00
@@ -44,7 +44,8 @@
static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, void *addr)
{
- _set_tssldt_desc(&cpu_gdt_table[cpu][entry], (int)addr, 235, 0x89);
+ _set_tssldt_desc(&cpu_gdt_table[cpu][entry], (int)addr,
+ offsetof(struct tss_struct, __cacheline_filler) - 1, 0x89);
}
#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
diff -Nru a/include/asm-i386/processor.h b/include/asm-i386/processor.h
--- a/include/asm-i386/processor.h 2004-07-06 21:54:34 +01:00
+++ b/include/asm-i386/processor.h 2004-07-06 21:54:34 +01:00
@@ -297,9 +297,9 @@
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
/*
- * Size of io_bitmap, covering ports 0 to 0x3ff.
+ * Size of io_bitmap.
*/
-#define IO_BITMAP_BITS 1024
+#define IO_BITMAP_BITS 65536
#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
#define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap)
@@ -391,7 +391,7 @@
/*
* pads the TSS to be cacheline-aligned (size is 0x100)
*/
- unsigned long __cacheline_filler[5];
+ unsigned long __cacheline_filler[37];
/*
* .. and then another 0x100 bytes for emergency kernel stack
*/
diff -Nru a/include/asm-mips/processor.h b/include/asm-mips/processor.h
--- a/include/asm-mips/processor.h 2004-07-06 21:54:34 +01:00
+++ b/include/asm-mips/processor.h 2004-07-06 21:54:34 +01:00
@@ -137,9 +137,9 @@
#endif
/*
- * Size of io_bitmap in longwords: 32 is ports 0-0x3ff.
+ * Size of io_bitmap in longwords.
*/
-#define IO_BITMAP_SIZE 32
+#define IO_BITMAP_SIZE 2048
#define NUM_FPU_REGS 32
diff -Nru a/include/asm-x86_64/processor.h b/include/asm-x86_64/processor.h
--- a/include/asm-x86_64/processor.h 2004-07-06 21:54:34 +01:00
+++ b/include/asm-x86_64/processor.h 2004-07-06 21:54:34 +01:00
@@ -178,9 +178,9 @@
(test_thread_flag(TIF_IA32) ? TASK_UNMAPPED_32 : TASK_UNMAPPED_64)
/*
- * Size of io_bitmap, covering ports 0 to 0x3ff.
+ * Size of io_bitmap.
*/
-#define IO_BITMAP_BITS 1024
+#define IO_BITMAP_BITS 65536
#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
#define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap)
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