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Re: Cleancache [2]



2011/6/14 dexen deVries wrote:
> On Monday 13 June 2011 16:40:48 you wrote:
>> Is it reproducible without zcache?
>
> I don't know how to check cleancache without zcache; cleancache itself doesn't
> do anything unless it has some backend configured, and zcache is the only
> backend I know of and can use.
>
>
> To enable zcache you need to have one `zcache' argument in kernel's command
> line.
>
>
> There's an outstanding bug in zcache's build system:
> http://code.google.com/p/compcache/issues/detail?id=91
>
> In short, core part of zcache may end up not being compiled at all ;-(
>
> To build zcache in 3.0-rc2, you need to hack it a bit with the attach'd patch.
> Basically it renames the `zcache.c' to `zcache-core.c' and updates Makefile.
>
>
> To verify zcache is enabled, look through dmesg for two lines like:
>> zcache: cleancache enabled using kernel transcendent memory and compression
> buddies
>>zcache: created ephemeral tmem pool, id=0

Thanks a lot, dexen.

The oops has not been reproduced yet, but I could see
/sys/kernel/mm/cleancache/* change.

I will try to catch the issue again this weekend.

Thanks,
Ryusuke Konishi

> --
> dexen deVries
>
> ``One can't proceed from the informal to the formal by formal means.''
>
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