From: Michael Slater <mslater@usa.com>
To: linux-mm@kvack.org
Subject: page swapping
Date: Mon, 27 Nov 2000 05:06:28 -0500 (EST) [thread overview]
Message-ID: <382135272.975319588337.JavaMail.root@web651-mc> (raw)
Hi,
I am relatively new to linux memory management and i would like to have some pointers regarding swapping out pages.
I was looking at the try_to_swap_out code and i have a few questions.
1) If a page is swapped out does it go to the swap--cache as well as to the swap space in disk?
Also a comment says "If the page is in swap-cache we can just drop reference to it as it is up-to date in disk". Does it means that the page is just discarded and the page tables updated.
2) What happens when a page is in swap-cache and is dirtied.Do
we update the page in swap-cache before freeing it? Can we have a dirty page in swap-cache?
3) What will be the page-count of a page when it is being swapped out . Is it 1 (as reference to the page in page-cache also counts i guess..)? If a page is only in swap-cache what is its count? Can a page be in swap/page cache at the same time.What will be its count then?
Last but not the least: Where can i get a detailed notes on linux memory mgmt? Does paul-wilson have an updated version of his notes.
Pl cc to me as i am not part of linux-mm gp.
Thanks in advance
mike
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reply other threads:[~2000-11-27 10:07 UTC|newest]
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