From: Dave Hansen <dave@linux.vnet.ibm.com>
To: Nathan Fontenot <nfont@austin.ibm.com>
Cc: linux-mm@kvack.org, greg@kroah.com, linux-kernel@vger.kernel.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 4/8] v3 Allow memory_block to span multiple memory sections
Date: Tue, 20 Jul 2010 12:21:20 -0700 [thread overview]
Message-ID: <1279653680.9785.5.camel@nimitz> (raw)
In-Reply-To: <4C451E1C.8070907@austin.ibm.com>
On Mon, 2010-07-19 at 22:55 -0500, Nathan Fontenot wrote:
> +static u32 get_memory_block_size(void)
> +{
> + u32 block_sz;
> +
> + block_sz = memory_block_size_bytes();
> +
> + /* Validate blk_sz is a power of 2 and not less than section size */
> + if ((block_sz & (block_sz - 1)) || (block_sz < MIN_MEMORY_BLOCK_SIZE))
> + block_sz = MIN_MEMORY_BLOCK_SIZE;
Is this worth a WARN_ON()? Seems pretty bogus if someone is returning
funky block sizes.
-- Dave
WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave@linux.vnet.ibm.com>
To: Nathan Fontenot <nfont@austin.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linuxppc-dev@ozlabs.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
greg@kroah.com
Subject: Re: [PATCH 4/8] v3 Allow memory_block to span multiple memory sections
Date: Tue, 20 Jul 2010 12:21:20 -0700 [thread overview]
Message-ID: <1279653680.9785.5.camel@nimitz> (raw)
In-Reply-To: <4C451E1C.8070907@austin.ibm.com>
On Mon, 2010-07-19 at 22:55 -0500, Nathan Fontenot wrote:
> +static u32 get_memory_block_size(void)
> +{
> + u32 block_sz;
> +
> + block_sz = memory_block_size_bytes();
> +
> + /* Validate blk_sz is a power of 2 and not less than section size */
> + if ((block_sz & (block_sz - 1)) || (block_sz < MIN_MEMORY_BLOCK_SIZE))
> + block_sz = MIN_MEMORY_BLOCK_SIZE;
Is this worth a WARN_ON()? Seems pretty bogus if someone is returning
funky block sizes.
-- Dave
WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave@linux.vnet.ibm.com>
To: Nathan Fontenot <nfont@austin.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linuxppc-dev@ozlabs.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
greg@kroah.com
Subject: Re: [PATCH 4/8] v3 Allow memory_block to span multiple memory sections
Date: Tue, 20 Jul 2010 12:21:20 -0700 [thread overview]
Message-ID: <1279653680.9785.5.camel@nimitz> (raw)
In-Reply-To: <4C451E1C.8070907@austin.ibm.com>
On Mon, 2010-07-19 at 22:55 -0500, Nathan Fontenot wrote:
> +static u32 get_memory_block_size(void)
> +{
> + u32 block_sz;
> +
> + block_sz = memory_block_size_bytes();
> +
> + /* Validate blk_sz is a power of 2 and not less than section size */
> + if ((block_sz & (block_sz - 1)) || (block_sz < MIN_MEMORY_BLOCK_SIZE))
> + block_sz = MIN_MEMORY_BLOCK_SIZE;
Is this worth a WARN_ON()? Seems pretty bogus if someone is returning
funky block sizes.
-- Dave
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next prev parent reply other threads:[~2010-07-20 19:21 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-20 3:45 [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections Nathan Fontenot
2010-07-20 3:45 ` Nathan Fontenot
2010-07-20 3:45 ` Nathan Fontenot
2010-07-20 3:51 ` [PATCH 1/8] v3 Move the find_memory_block() routine up Nathan Fontenot
2010-07-20 3:51 ` Nathan Fontenot
2010-07-20 3:51 ` Nathan Fontenot
2010-07-20 6:55 ` KAMEZAWA Hiroyuki
2010-07-20 6:55 ` KAMEZAWA Hiroyuki
2010-07-20 6:55 ` KAMEZAWA Hiroyuki
2010-07-20 3:52 ` [PATCH 2/8] v3 Add new phys_index properties Nathan Fontenot
2010-07-20 3:52 ` Nathan Fontenot
2010-07-20 3:52 ` Nathan Fontenot
2010-07-20 6:57 ` KAMEZAWA Hiroyuki
2010-07-20 6:57 ` KAMEZAWA Hiroyuki
2010-07-20 6:57 ` KAMEZAWA Hiroyuki
2010-07-20 13:24 ` Nathan Fontenot
2010-07-20 13:24 ` Nathan Fontenot
2010-07-20 13:24 ` Nathan Fontenot
2010-07-20 19:10 ` Dave Hansen
2010-07-20 19:10 ` Dave Hansen
2010-07-20 19:10 ` Dave Hansen
2010-07-20 3:53 ` [PATCH 3/8] v3 Add section count to memory_block Nathan Fontenot
2010-07-20 3:53 ` Nathan Fontenot
2010-07-20 3:53 ` Nathan Fontenot
2010-07-20 7:01 ` KAMEZAWA Hiroyuki
2010-07-20 7:01 ` KAMEZAWA Hiroyuki
2010-07-20 7:01 ` KAMEZAWA Hiroyuki
2010-07-20 13:26 ` Nathan Fontenot
2010-07-20 13:26 ` Nathan Fontenot
2010-07-20 13:26 ` Nathan Fontenot
2010-07-20 3:55 ` [PATCH 4/8] v3 Allow memory_block to span multiple memory sections Nathan Fontenot
2010-07-20 3:55 ` Nathan Fontenot
2010-07-20 3:55 ` Nathan Fontenot
2010-07-20 7:15 ` KAMEZAWA Hiroyuki
2010-07-20 7:15 ` KAMEZAWA Hiroyuki
2010-07-20 7:15 ` KAMEZAWA Hiroyuki
2010-07-20 13:28 ` Nathan Fontenot
2010-07-20 13:28 ` Nathan Fontenot
2010-07-20 13:28 ` Nathan Fontenot
2010-07-20 19:18 ` Dave Hansen
2010-07-20 19:18 ` Dave Hansen
2010-07-20 19:18 ` Dave Hansen
2010-07-24 3:09 ` Nathan Fontenot
2010-07-24 3:09 ` Nathan Fontenot
2010-07-24 3:09 ` Nathan Fontenot
2010-07-27 2:36 ` Dave Hansen
2010-07-27 2:36 ` Dave Hansen
2010-07-27 2:36 ` Dave Hansen
2010-07-26 19:10 ` Nathan Fontenot
2010-07-26 19:10 ` Nathan Fontenot
2010-07-26 19:10 ` Nathan Fontenot
2010-07-20 19:21 ` Dave Hansen [this message]
2010-07-20 19:21 ` Dave Hansen
2010-07-20 19:21 ` Dave Hansen
2010-07-20 3:56 ` [PATCH 5/8] v3 Update the find_memory_block declaration Nathan Fontenot
2010-07-20 3:56 ` Nathan Fontenot
2010-07-20 3:56 ` Nathan Fontenot
2010-07-20 7:16 ` KAMEZAWA Hiroyuki
2010-07-20 7:16 ` KAMEZAWA Hiroyuki
2010-07-20 7:16 ` KAMEZAWA Hiroyuki
2010-07-20 3:57 ` [PATCH 6/8] v3 Update the node sysfs code Nathan Fontenot
2010-07-20 3:57 ` Nathan Fontenot
2010-07-20 3:57 ` Nathan Fontenot
2010-07-20 7:17 ` KAMEZAWA Hiroyuki
2010-07-20 7:17 ` KAMEZAWA Hiroyuki
2010-07-20 7:17 ` KAMEZAWA Hiroyuki
2010-07-28 13:50 ` Brian King
2010-07-28 13:50 ` Brian King
2010-07-28 13:50 ` Brian King
2010-07-20 3:59 ` [PATCH 7/8] v3 Define memory_block_size_bytes() for ppc/pseries Nathan Fontenot
2010-07-20 3:59 ` Nathan Fontenot
2010-07-20 3:59 ` Nathan Fontenot
2010-07-21 20:27 ` Brian King
2010-07-21 20:27 ` Brian King
2010-07-21 20:27 ` Brian King
2010-07-20 3:59 ` [PATCH 8/8] v3 Update memory-hotplug documentation Nathan Fontenot
2010-07-20 3:59 ` Nathan Fontenot
2010-07-20 3:59 ` Nathan Fontenot
2010-07-20 19:23 ` Dave Hansen
2010-07-20 19:23 ` Dave Hansen
2010-07-20 19:23 ` Dave Hansen
2010-07-31 5:36 ` [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections Benjamin Herrenschmidt
2010-07-31 5:36 ` Benjamin Herrenschmidt
2010-07-31 5:36 ` Benjamin Herrenschmidt
2010-07-31 19:55 ` Greg KH
2010-07-31 19:55 ` Greg KH
2010-07-31 19:55 ` Greg KH
2010-08-01 0:27 ` Benjamin Herrenschmidt
2010-08-01 0:27 ` Benjamin Herrenschmidt
2010-08-01 0:27 ` Benjamin Herrenschmidt
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