From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>,
linux-kernel@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>
Subject: Re: mmotm 2010-10-20-15-01 uploaded
Date: Thu, 21 Oct 2010 11:54:29 +0200 [thread overview]
Message-ID: <1287654869.3488.96.camel@twins> (raw)
In-Reply-To: <20101021003008.064302ad.akpm@linux-foundation.org>
On Thu, 2010-10-21 at 00:30 -0700, Andrew Morton wrote:
> btw, it's a bit sad to use KM_TYPE_NR*NR_CPUS pages of virtual address
> space for kmap_atomic(). I'd expect that distros set NR_CPUS quite
> large (Fedora has 256). That's 20MB of virtual address space consumed,
> I think.
>
> And we consume it on non-highmem kernels, too...
I guess its something to look at, luckily i386 kernels tend to have
small NR_CPUS and x86_64 kernels have gobs of vaddr space so its not
really a problem, but yeah would be nice to fix.
next prev parent reply other threads:[~2010-10-21 9:54 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-20 22:01 mmotm 2010-10-20-15-01 uploaded akpm
2010-10-21 2:54 ` Li Zefan
2010-10-21 3:15 ` Li Zefan
2010-10-21 3:38 ` Konrad Rzeszutek Wilk
2010-10-21 3:44 ` Li Zefan
2010-10-21 14:28 ` Konrad Rzeszutek Wilk
2010-10-21 3:46 ` Andrew Morton
2010-10-21 7:17 ` Peter Zijlstra
2010-10-21 7:30 ` Andrew Morton
2010-10-21 9:52 ` Peter Zijlstra
2010-10-21 9:54 ` Peter Zijlstra [this message]
2010-10-21 7:41 ` HDA: no sound [was: mmotm 2010-10-20-15-01 uploaded] Jiri Slaby
2010-10-21 7:49 ` Takashi Iwai
2010-10-21 7:57 ` Jiri Slaby
2010-10-21 8:05 ` Takashi Iwai
2010-10-21 18:27 ` Jiri Slaby
2010-10-21 19:20 ` Takashi Iwai
2010-10-21 19:21 ` Jiri Slaby
2010-10-21 19:22 ` Takashi Iwai
2010-10-21 19:40 ` Takashi Iwai
2010-10-21 20:29 ` Valdis.Kletnieks
2010-10-21 20:48 ` Takashi Iwai
2010-10-21 21:24 ` Valdis.Kletnieks
2010-10-21 21:31 ` Takashi Iwai
2010-10-21 21:42 ` Jiri Slaby
2010-10-22 8:46 ` Colin Guthrie
2010-10-22 9:02 ` Takashi Iwai
2010-10-22 9:18 ` Jiri Slaby
2010-10-22 9:40 ` Takashi Iwai
2010-10-22 9:45 ` Jiri Slaby
2010-10-22 10:26 ` Takashi Iwai
2010-10-22 11:10 ` Jiri Slaby
2010-10-22 9:41 ` Colin Guthrie
2010-10-22 11:31 ` [alsa-devel] " Clemens Ladisch
2010-10-22 11:51 ` Jiri Slaby
2010-10-22 14:03 ` Takashi Iwai
2010-10-22 19:53 ` Colin Guthrie
2010-10-21 15:22 ` Valdis.Kletnieks
2010-10-21 17:59 ` Jiri Slaby
2010-10-21 11:10 ` mmotm 2010-10-20-15-01 uploaded Zimny Lech
2010-10-21 11:14 ` mmotm 2010-10-20 - netfilter Kconfig whinge Valdis.Kletnieks
2010-10-29 19:11 ` Patrick McHardy
2010-10-21 17:51 ` DVB: af9015 defunct [was: mmotm 2010-10-20-15-01 uploaded] Jiri Slaby
2010-10-21 22:24 ` Jiri Slaby
2010-10-22 9:21 ` Jiri Slaby
2010-10-22 13:56 ` Mauro Carvalho Chehab
2010-10-22 14:06 ` Jiri Slaby
2010-10-27 16:12 ` Mauro Carvalho Chehab
2010-10-27 16:36 ` Jiri Slaby
2010-10-27 17:05 ` Mauro Carvalho Chehab
2010-10-27 16:41 ` Antti Palosaari
2010-10-27 17:11 ` Mauro Carvalho Chehab
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