Re: [patch] arca-vm-2.2.5

Andrea Arcangeli
1999-04-06T17:16:03Z

On Tue, 6 Apr 1999, Chuck Lever wrote:

>> We always, always use page-aligned lookups for the page cache.
>> (Actually there is one exception: certain obsolete a.out binaries, which
>> are demand paged with the pages beginning at offset 1K into the binary.
>> We don't support cache coherency for those and we don't support them at
>> all on filesystems with a >1k block size. It doesn't impact on the hash
>> issue.)
>
>i guess i'm confused then. what good does this change do:

Hmm I think I misunderstood you point, Chuck. I thought you was
complaining about the fact that some hash entry could be unused and other
overloaded but I was just assuming that the offset is always page-aligned.
I could write a simulation to check the hash function...

Andrea Arcangeli