On Fri, 2009-12-04 at 22:07 +0800, Wu Zhangjin wrote: > On Fri, 2009-12-04 at 21:57 +0800, Figo.zhang wrote: > > hi, > > i am using 24KC soc, and linux2.6.21.5 kernel and set CONFIG_HIGHMEM > > enable. if my realy physic RAM is not more than HIGHMEM, such as only > > 32MB, it is some issue about kernel, i dont know how to fix it? I try > > linux-2.6.31.4, it is no this issue, is it some change , how to fix it? > > Hello, here is the unique commit about the higmem I can found: > > commit bb86bf28aec6d0a207ae09f38a43e94133d4d6db > Author: Ralf Baechle <ralf@xxxxxxxxxxxxxx> > Date: Sat Apr 25 11:25:34 2009 +0200 > > MIPS: Fix highmem. > > Commit 351336929ccf222ae38ff0cb7a8dd5fd5c6236a0 (kernel.org) rsp. > b3594a089f1c17ff919f8f78505c3f20e1f6f8ce (linux-mips.org): > > > From: Chris Dearman <chris@xxxxxxxx> > > Date: Wed, 19 Sep 2007 00:58:24 +0100 > > Subject: [PATCH] [MIPS] Allow setting of the cache attribute at > run time. > > > > Slightly tacky, but there is a precedent in the sparc archirecture > code. > > introduces the variable _page_cachable_default, which defaults to > zero and. > is used to create the prototype PTE for __kmap_atomic in > arch/mips/mm/init.c:kmap_init before initialization in > arch/mips/mm/c-r4k.c:coherency_setup, so the default value of 0 will > be > used as the CCA of kmap atomic pages which on many processors is not > a > defined CCA value and may result in writes to kmap_atomic pages > getting > corrupted. Debugged by Jon Fraser (jfraser@xxxxxxxxxxxx). > > Could you please try to apply it, and test it again? hi , i have apply the patch by manual, http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bb86bf28aec6d0a207ae09f38a43e94133d4d6db http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=351336929ccf222ae38ff0cb7a8dd5fd5c6236a0 but the issue still. so what is the problem? Best, Figo.zhang > > > > > here is my kernel log: > > Linux version 2.6.21.5 (figo@myhost) (gcc version 4.1.2) #22 Fri Dec 4 > > 10:33:25 CST 2009 > > CPU revision is: 00019655 > > Determined physical RAM map: > > memory: start:0x0,size=0x2000000,type=0x1 > > (usable) > > User-defined physical RAM map: > > memory: start:0x0,size=0x2000000,type=0x1 > > (usable) > > Initrd not found or empty - disabling initrd > > Built 1 zonelists. Total pages: 8128 > > Kernel command line: console=ttyS0,115200 rdinit=/linuxrc mem=32M nofpu > > mac=00:aa:aa:bb:bb:99 > > Updated MAC address from u-boot: 8024ff24M > > Primary instruction cache 32kB, physically tagged, 4-way, linesize 32 > > bytes. > > Primary data cache 32kB, 4-way, linesize 32 bytes. > > Synthesized TLB refill handler (20 instructions). > > Synthesized TLB load handler fastpath (32 instructions). > > Synthesized TLB store handler fastpath (32 instructions). > > Synthesized TLB modify handler fastpath (31 instructions). > > Cache parity protection disabled > > arch/mips/mach-opulan/optrann/irq.c,arch_init_irq > > PID hash table entries: 128 (order: 7, 512 bytes) > > Using 150.000 MHz high precision timer. > > arch/mips/mach-opulan/optrann/time.c,plat_timer_setup > > Dentry cache hash table entries: 4096 (order: 2, 16384 bytes) > > Inode-cache hash table entries: 2048 (order: 1, 8192 bytes) > > Memory: 29012k/32768k available (1798k kernel code, 3756k reserved, 369k > > data, 900k init, 0k highmem) > > Mount-cache hash table entries: 512 > > NET: Registered protocol family 16 > > Generic PHY: Registered new driver > > Time: MIPS clocksource has been installed. > > NET: Registered protocol family 2 > > IP route cache hash table entries: 1024 (order: 0, 4096 bytes) > > TCP established hash table entries: 1024 (order: 1, 8192 bytes) > > TCP bind hash table entries: 1024 (order: 0, 4096 bytes) > > TCP: Hash tables configured (established 1024 bind 1024) > > TCP reno registered > > Installing knfsd (copyright (C) 1996 okir@xxxxxxxxxxxx). > > io scheduler noop registered > > io scheduler anticipatory registered (default) > > io scheduler deadline registered > > io scheduler cfq registered > > Serial: optrann serial driver $Revision: 1.0 > > uart_register_driver finished > > ttyS0 at MMIO map 0xbf004000 mem 0xbf004000 (irq = 23) is a UART 0 > > RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize > > loop: loaded (max 8 devices) > > nbd: registered device at major 43 > > optrann_fe_ether Ethernet driver, V1.00 > > FE:dmac_regs =0xbf014000,msg_regs=0xbf028000, irq=26 > > FE MAC: 00:aa:aa:bb:bb:99 > > TCP cubic registered > > Freeing unused kernel memory: 900k freed > > ramdisk_execute_command=/linuxrc, execute_command=<NULL> > > Bad pte = 0135c79f, process = linuxrc, vm_flags = 100073, vaddr = > > 2aaae000 > > Call Trace: > > [<80048d70>] dump_stack+0x8/0x34 > > [<8009ebb0>] vm_normal_page+0x68/0x90 > > [<8009f850>] unmap_vmas+0x1e8/0x5e8 > > [<800a3428>] unmap_region+0x9c/0x184 > > [<800a4268>] do_munmap+0x1b0/0x25c > > [<800a4358>] sys_munmap+0x44/0x70 > > [<8004af40>] stack_done+0x20/0x3c > > Bad pte = 0135e79f, process = linuxrc, vm_flags = 100073, vaddr = > > 2aaae000 > > Call Trace: > > [<80048d70>] dump_stack+0x8/0x34 > > [<8009ebb0>] vm_normal_page+0x68/0x90 > > [<8009f850>] unmap_vmas+0x1e8/0x5e8 > > [<800a3428>] unmap_region+0x9c/0x184 > > [<800a4268>] do_munmap+0x1b0/0x25c > > [<800a4358>] sys_munmap+0x44/0x70 > > [<8004af40>] stack_done+0x20/0x3c > > Bad pte = 0026079f, process = linuxrc, vm_flags = 100073, vaddr = > > 2aaae000 > > Call Trace: > > [<80048d70>] dump_stack+0x8/0x34 > > [<8009ebb0>] vm_normal_page+0x68/0x90 > > [<8009f850>] unmap_vmas+0x1e8/0x5e8 > > [<800a3428>] unmap_region+0x9c/0x184 > > [<800a4268>] do_munmap+0x1b0/0x25c > > [<800a4358>] sys_munmap+0x44/0x70 > > [<8004af40>] stack_done+0x20/0x3c > > > > ......... > > > > > > Best, > > Figo.zhang > > > >
