Re: [Lhms-devel] [RFC] buddy allocator without bitmap [2/4]

[Hiroyuki KAMEZAWA]

Okay, I'll do more test and if I find atomic ops are slow,
I'll add __XXXPagePrivate() macros.

ps. I usually test codes on Xeon 1.8G x 2 server.

-- Kame

Andrew Morton wrote:
> Hiroyuki KAMEZAWA <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:
>
> > In the previous version, I used SetPagePrivate()/ClearPagePrivate()/PagePrivate().
> > But these are "atomic" operation and looks very slow.
> > This is why I doesn't used these macros in this version.
> >
> > My previous version, which used set_bit/test_bit/clear_bit, shows very bad performance
> > on my test, and I replaced it.
>
>
> That's surprising.  But if you do intend to use non-atomic bitops then
> please add __SetPagePrivate() and __ClearPagePrivate()

--
--the clue is these footmarks leading to the door.--
KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>

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