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Re: Review of Thomas's >2GB ext2fs proposal
From: |
Thomas Bushnell BSG |
Subject: |
Re: Review of Thomas's >2GB ext2fs proposal |
Date: |
17 Aug 2004 02:51:37 -0700 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 |
"Neal H. Walfield" <neal@cs.uml.edu> writes:
> > Just a small techical correction: we remove mapping only when we are
> > remapping page to contain another block. So when page is evicted, it
> > continues to map the same disk block until ext2fs decides that we want
> > this page to hold another block (only if page is still evicted, of
> > course).
>
> Well, I think we ought to drain the mapping cache when the page is
> evicted. This keeps memory usage lower. Further, relative to the
> cost of reading from disk, adding an entry to the hashes, etc. is
> cheap.
I'm confused. It sounded like Ognyan was saying that the page is
still assigned to the same area. But it is necessary to vm_free when
the kernel tells you to page out. It is unfriendly (and very bad for
performance) to hold on to the page.
- Re: Review of Thomas's >2GB ext2fs proposal, (continued)
- Re: Review of Thomas's >2GB ext2fs proposal, Ognyan Kulev, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Thomas Bushnell BSG, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Ognyan Kulev, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Thomas Bushnell BSG, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Ognyan Kulev, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Thomas Bushnell BSG, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Neal H. Walfield, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal,
Thomas Bushnell BSG <=
- Re: Review of Thomas's >2GB ext2fs proposal, Ognyan Kulev, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Thomas Bushnell BSG, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Neal H. Walfield, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Neal H. Walfield, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Neal H. Walfield, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Neal H. Walfield, 2004/08/16
- Re: Review of Thomas's >2GB ext2fs proposal, Thomas Bushnell BSG, 2004/08/16
- Re: Review of Thomas's >2GB ext2fs proposal, Neal H. Walfield, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Thomas Bushnell BSG, 2004/08/17
- Re: Review of Thomas's >2GB ext2fs proposal, Neal H. Walfield, 2004/08/17