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SubjectRe: High mem support, oops on 2.4.18
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I ran the memtest86 for over 24h and did not show any errors in the ram.
The computer works with the same ram but without the Hi mem support. If
i use the same kernel but with hi mem enabled i get kernel oopses, load
rises ...etc.

The computer is :one Pentium III , 700mhz with 1G ram, running 2.4.18
kernel [RH 6.2]


one of the oops ..
-----------------When i ran lilo--------------------
Jun 18 11:25:38 ena kernel: <1>Unable to handle kernel NULL pointer
dereference at virtual address 00000000
Jun 18 11:25:38 ena kernel: f88b920f
Jun 18 11:25:38 ena kernel: *pde = 00000000
Jun 18 11:25:38 ena kernel: Oops: 0000
Jun 18 11:25:38 ena kernel: CPU: 0
Jun 18 11:25:38 ena kernel: EIP: 0010:[<f88b920f>] Not tainted
Jun 18 11:25:38 ena kernel: EFLAGS: 00010206
Jun 18 11:25:38 ena kernel: eax: 00000000 ebx: 00000400 ecx:
00000100 edx: f1bae000
Jun 18 11:25:38 ena kernel: esi: 00000000 edi: f1bae000 ebp:
c1c6eb80 esp: d6a35e64
Jun 18 11:25:38 ena kernel: ds: 0018 es: 0018 ss: 0018
Jun 18 11:25:38 ena kernel: Process lilo (pid: 12754,
stackpage=d6a35000)
Jun 18 11:25:38 ena kernel: Stack: 00000001 f2e788c0 c02e4d64 000044f8
00000000 00000000 00000000 000008a0
Jun 18 11:25:38 ena kernel: f72cc690 f88b9295 00000001 f2e788c0
00000001 00000101 f2e788c0 c01a69ac
Jun 18 11:25:38 ena kernel: c02e4d64 00000001 f2e788c0 00000002
00000001 f3756c80 000030a9 c01a6a6f
Jun 18 11:25:38 ena kernel: Call Trace: [<f88b9295>]
[disk_change+364/604] [disk_change+559/604]
[invalidate_inode_buffers+0/92] [getblk+41
/60]
Jun 18 11:25:38 ena kernel: Code: f3 a5 f6 c3 02 74 02 66 a5 f6 c3 01
74
01 a4 83 7c 24 28 00


>>EIP; f88b920f <[rd]rd_blkdev_pagecache_IO+ff/148> <=====

>>edx; f1bae000 <_end+318af4e0/385a64e0>
>>edi; f1bae000 <_end+318af4e0/385a64e0>
>>ebp; c1c6eb80 <_end+1970060/385a64e0>
>>esp; d6a35e64 <_end+16737344/385a64e0>

Trace; f88b9295 <[rd]rd_make_request+3d/68>

Code; f88b920f <[rd]rd_blkdev_pagecache_IO+ff/148>
00000000 <_EIP>:
Code; f88b920f <[rd]rd_blkdev_pagecache_IO+ff/148> <=====
0: f3 a5 repz movsl %ds:(%esi),%es:(%edi)
<=====
Code; f88b9211 <[rd]rd_blkdev_pagecache_IO+101/148>
2: f6 c3 02 test $0x2,%bl
Code; f88b9214 <[rd]rd_blkdev_pagecache_IO+104/148>
5: 74 02 je 9 <_EIP+0x9> f88b9218
<[rd]rd_blkdev_pagecache_IO+108/148>
Code; f88b9216 <[rd]rd_blkdev_pagecache_IO+106/148>
7: 66 a5 movsw %ds:(%esi),%es:(%edi)
Code; f88b9218 <[rd]rd_blkdev_pagecache_IO+108/148>
9: f6 c3 01 test $0x1,%bl
Code; f88b921b <[rd]rd_blkdev_pagecache_IO+10b/148>
c: 74 01 je f <_EIP+0xf> f88b921e
<[rd]rd_blkdev_pagecache_IO+10e/148>
Code; f88b921d <[rd]rd_blkdev_pagecache_IO+10d/148>
e: a4 movsb %ds:(%esi),%es:(%edi)
Code; f88b921e <[rd]rd_blkdev_pagecache_IO+10e/148>
f: 83 7c 24 28 00 cmpl $0x0,0x28(%esp,1)

-----------------end lilo exec---------------------------
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