linux-kernel - Re: [ewg] Re: [PATCH 2.6.31] ehca: Tolerate dynamic memory operations and huge pages

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Date:	Tue, 16 Jun 2009 09:10:39 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Alexander Schmidt <alexs@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, ewg@...ts.openfabrics.org,
	linuxppc-dev@...abs.org, raisch@...ibm.com,
	Hoang-Nam Nguyen <HNGUYEN@...ux.vnet.ibm.com>
Subject: Re: [ewg] Re: [PATCH 2.6.31] ehca: Tolerate dynamic memory operations and huge pages


 > Yeah, the notifier code remains untouched as we still do not allow dynamic
 > memory operations _while_ our module is loaded. The patch allows the driver to
 > cope with DMEM operations that happened before the module was loaded, which
 > might result in a non-contiguous memory layout. When the driver registers
 > its global memory region in the system, the memory layout must be considered.
 > 
 > We chose the term "toleration" instead of "support" to illustrate this.

I see.  So things just silently broke in some cases when the driver was
loaded after operations you didn't tolerate?

Anyway, thanks for the explanation.
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