From: Alex Vainman <alexonlists-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Cc: alexv-smomgflXvOZWk0Htik3J/w@public.gmane.org,
roland <rolandd-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
alexr-smomgflXvOZWk0Htik3J/w@public.gmane.org,
monis-smomgflXvOZWk0Htik3J/w@public.gmane.org,
ogerlitz-smomgflXvOZWk0Htik3J/w@public.gmane.org
Subject: Re: [PATCH] libibverbs: Add huge page support to ibv_madvise_range()
Date: Thu, 13 May 2010 17:04:11 +0300 [thread overview]
Message-ID: <4BEC06DB.30505@gmail.com> (raw)
In-Reply-To: <adazl0c92kp.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
Roland Dreier Wrote:
> > In order to avoid adding additional dependency to libibverbs, maybe
> > we should just to enhance the get_huge_page_size() so it will support
> > multiple huge page sizes?
>
> I think that does make sense. However see my reply to Alexander
> Schmidt -- maybe there is something clever we can do with /proc/*/maps
> to figure out when we need to use this?
>
> - R.
Maybe we should use the /proc/pid/pagemap and /proc/kpageflags files? These files let a userspace process find out which physical frame each virtual page is mapped to and to get the properties of each page frame including the page size.
The disadvantage of this method is, that it applicable on kernel >= 2.6.25, since this interface is supported starting from the kernel 2.6.25.
-Alex
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next prev parent reply other threads:[~2010-05-13 14:04 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-29 17:08 [PATCH] libibverbs: Add huge page support to ibv_madvise_range() Alex Vainman
[not found] ` <4B12AA78.7090401-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2009-12-08 14:03 ` Alex Vainman
[not found] ` <4B1E5CA9.3090707-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-01-12 9:26 ` Alex Vainman
2010-01-12 14:25 ` Eli Cohen
2010-01-14 15:12 ` Alex Vainman
2010-01-15 18:59 ` Roland Dreier
[not found] ` <ada8wbzi490.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-01-17 9:30 ` Alex Vainman
[not found] ` <4B52D8A8.7060804-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-01-17 17:19 ` Roland Dreier
[not found] ` <adak4vghcoo.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-01-18 12:53 ` Alex Vainman
[not found] ` <4B5459E3.2040902-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-02-17 14:52 ` Chuck Hartley
2010-04-22 7:35 ` Alex Vainman
[not found] ` <4BCFFC48.4060401-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-05-06 20:51 ` Roland Dreier
[not found] ` <adazl0c92kp.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-05-13 14:04 ` Alex Vainman [this message]
[not found] ` <4BEC06DB.30505-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-05-13 15:50 ` Roland Dreier
[not found] ` <adapr0zsswc.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-05-14 0:04 ` Pradeep Satyanarayana
[not found] ` <4BEC937F.5000808-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2010-05-18 5:29 ` Pradeep Satyanarayana
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