linux-kernel - Re: [PATCH 3/3] Quick vmalloc vs kmalloc fix to the case where array size is too large

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Message-ID: <6599ad830907132050n226aecb3ucab6746a4d0e81fa@mail.gmail.com>
Date:	Mon, 13 Jul 2009 20:50:33 -0700
From:	Paul Menage <menage@...gle.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Benjamin Blum <bblum@...gle.com>, Li Zefan <lizf@...fujitsu.com>,
	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, akpm@...ux-foundation.org,
	serue@...ibm.com
Subject: Re: [PATCH 3/3] Quick vmalloc vs kmalloc fix to the case where array 
	size is too large

On Mon, Jul 13, 2009 at 4:49 PM, KAMEZAWA
Hiroyuki<kamezawa.hiroyu@...fujitsu.com> wrote:
> IIUC, this place, .../procs interface is not so important for performance
> as to being allowed this ugly conding.
>

It's not just the calling thread that suffers from the overhead -
we've seen performance hits on other processes on a machine due to the
TLB-shootdown overhead associated with vmalloc()/vfree().

Paul
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