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Date: Sat, 15 Nov 2008 20:52:29 -0800 From: Arjan van de Ven <arjan@...radead.org> To: Lai Jiangshan <laijs@...fujitsu.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, Paul Menage <menage@...gle.com>, kamezawa.hiroyu@...fujitsu.com, Balbir Singh <balbir@...ux.vnet.ibm.com>, Jens Axboe <jens.axboe@...cle.com>, "David S. Miller" <davem@...emloft.net>, Jan Kara <jack@...e.cz>, Jes Sorensen <jes@....com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 1/7] mm: introduce simple_malloc()/simple_free() On Sun, 16 Nov 2008 12:33:15 +0800 Lai Jiangshan <laijs@...fujitsu.com> wrote: > > some subsystem needs vmalloc() when required memory is large. > but current kernel has not APIs for this requirement. > this patch introduces simple_malloc() and simple_free(). Hi I kinda really don't like this approach. vmalloc() (and especially, vfree()) is a really expensive operation, and vmalloc()'d memory is also slower (due to tlb pressure). Realistically, people should try hard to use small datastructure instead.... -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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