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SubjectRe: [V9fs-developer] [RFC PATCH -V2 0/17] Buffered write and writeable mmap support for 9P
On Sat, Feb 5, 2011 at 12:03 PM, Aneesh Kumar K. V
<> wrote:
> On Sat,  5 Feb 2011 23:16:28 +0530, "Aneesh Kumar K.V" <> wrote:
>> The patch series implement buffered write and writeable mmap for 9P
>> Changes from V1:
>> a) Add fsync and syncfs support
> I haven't yet addressed the previous review feedback from
> Miklos.
> Running 9p server and client on the same host even though possible
> is not a strong use case at this point. I will get to that later.

It is for a lot of the legacy cases including using 9p to access
user-space file servers. Of course, there are some long standing
issues with this for anything which re-exports the name space. Also -
most user-space file servers on the same host wouldn't want cache
support anyways.

> The patch series also don't address cache consistency issue that
> can arise due to direct modification in the server. I am not
> sure we need to complicate the client code for that considering
> the cache model that we follow is loose.

Agreed, the loose cache model doesn't respect any consistency
guarantees. Once we implement any of the more conventional cache
policies we'll have to worry about it.

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