linux-kernel - Re: [HPDD-discuss] [PATCH 2/11] Staging: lustre: fld: Use kzalloc and kfree

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Date:	Fri, 1 May 2015 20:49:26 +0000
From:	"Drokin, Oleg" <oleg.drokin@...el.com>
To:	"Simmons, James A." <simmonsja@...l.gov>
CC:	Julia Lawall <julia.lawall@...6.fr>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"HPDD-discuss@...ts.01.org" <HPDD-discuss@...1.01.org>
Subject: Re: [HPDD-discuss] [PATCH 2/11] Staging: lustre: fld: Use kzalloc
 and kfree


On May 1, 2015, at 4:18 PM, Simmons, James A. wrote:

> Yes the LARGE functions do the switching. I was expecting also patches to remove the 
> OBD_ALLOC_LARGE functions as well which is not the case here.  I do have one question still. The
> macro __OBD_MALLOC_VERBOSE allowed the ability to simulate memory allocation failures at
> a certain percentage rate. Does something exist in the kernel to duplicate that functionality?
> Once these macros are gone we lose the ability to simulate high memory allocation failures.

Yes, there are things like https://lkml.org/lkml/2014/12/25/64
So I think the API is even riher compared to what our old wrapper code was able to do.

Bye,
    Oleg--
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