Re: huge tlb support - Mailing list pgsql-hackers

From Tom Lane
Subject Re: huge tlb support
Date
Msg-id 677.1341814260@sss.pgh.pa.us
Whole thread Raw
In response to Re: huge tlb support  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: huge tlb support  (Martijn van Oosterhout <kleptog@svana.org>)
Re: huge tlb support  (Andres Freund <andres@2ndquadrant.com>)
Re: huge tlb support  (yamt@mwd.biglobe.ne.jp (YAMAMOTO Takashi))
List pgsql-hackers
yamt@mwd.biglobe.ne.jp (YAMAMOTO Takashi) writes:
>> Also, I was under the impression that recent Linux kernels use hugepages
>> automatically if they can, so I wonder exactly what Andres was testing
>> on ...

> if you mean the "trasparent hugepage" feature, iirc it doesn't affect
> MAP_SHARED mappings like this.

Oh!  That would explain some things.  It seems like a pretty nasty
restriction though ... do you know why they did that?
        regards, tom lane


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