Messages in this thread | | | Date | Sun, 12 May 2002 18:53:36 -0400 (EDT) | From | Alexander Viro <> | Subject | Re: [RFC] ext2 and ext3 block reservations can be bypassed |
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On Mon, 13 May 2002, Peter Chubb wrote:
> This is why in SVr4, struct cred is cloned at open time, and passed > down to each VFS operation.
That doesn't work for shared mappings over holes. Unfortunately. Yes, credentials cache a-la 4.4BSD would help in many cases, but we have no reasonably credentials when kswapd writes a dirty page on disk. It _can_ cause allocations. And many processes might've touched that page until it finally got written out - which credentials would you use?
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