Page Fault Interrupt Problems

Posted by Vikas on Stack Overflow See other posts from Stack Overflow or by Vikas
Published on 2010-05-29T16:25:38Z Indexed on 2010/05/29 16:32 UTC
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memory

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memory-management

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operating-system

This is a statement referring to problem caused by page fault:(from Silberschatz 7th ed P-310 last para)

'We cant simply restart instructions when instruction modifies several different location Ex:when a instruction moves 256 bytes from source to dest and either src or dest straddles on page boundary , then,after a partial move, if a page fault occurs, 'we can't simply restart the instructions'

My question is Why not? Simply restart the instruction again do the same copy after page is in. Is there any problem in it?

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