Thomas Bushnell BSG wrote:
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.
vm_free is something that libpager takes care of.
You are probably confused because "map" can have 2 meanings:
1. Mapping page of address space to page of pager.
2. Mapping page of pager to disk block.
And the current ext2fs relies heavily on the ability to remap (2).
Regards,
ogi
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