Re: Question about swap_in() in 2.2.16 ....

"Stephen C. Tweedie" wrote:

Hi,

On Wed, Nov 08, 2000 at 01:32:26AM -0500, Shuvabrata Ganguly wrote:

quoted

after the missing page has been swapped in this bit of code is
executed:-

if (!write_access || is_page_shared(page_map)) {
      set_pte(page_table, mk_pte(page, vma->vm_page_prot));
      return 1;
 }

Now this creates a read-only mapping  even if the access was a "write
acess"  ( if the page is shared ). Doesnt this mean that an additional
"write-protect" fault will be taken immediately when the process tries
to write again ?

Yes.

Then why dont we give it a private page in the first place ?

Cheers
Joy

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