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To: <>
Subject: HIGHMEM Query
From: <>
Date: Thu, 17 Feb 2005 10:40:22 +0530
Cc: <>, <>, <>
Original-recipient: rfc822;
Thread-index: AcUUrvrEzJ/OWOMRTyGz66/gZQHugg==
Thread-topic: HIGHMEM Query



I have been working on HIGHMEM fixation for 2.4.20 linux MVL kernel for MIPS architecture.

I am getting DATA BUS ERROR(ADDR: 0xffffd000) exception when loading (copying the data received from ethernet to the kernel space in FIXADDR SPACE) “/sbin/init” from TARGET ROOT DIR (through NFS). I figured out that this is because there is no corresponding page table entry for the same.


I checked that the virtual address is generated by making a call to kmap_atomic(). Which internally calls set_pte() and then local_flush_tlb_all(). Virtual Address is generated by making a call to        


vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);

1> Where is the page table entries updated?

2> When are they updated with the processor?








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