Thank you Matthew!
Am 2021-03-12 16:15, schrieb Matthew Wilcox:
The wikipedia diagram is wrong. Anonymous memory is not handled by the
page cache.
Is it roughly right to say, that the virtual memory uses page tables to
handle anonymous memory?
Anonymous pages enter the storage stack via swap; they are
found in the page tables, sent to the swap cache and then written to
swap devices or swap files. Filesystems may get involved at that
point,
but not always.
And the page cache doesn't handle anonymous memory - even when it is
swapped?
There are other weird things in the wikipedia diagram, like Direct I/O
being seemingly detached from applications, and not appearing to pass
through the VFS.
I'm not an expert. Maybe I should add at least note about that on
Wikipedia?
