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From: Greg KH <greg@kroah.com>
To: Nathan Fontenot <nfont@austin.ibm.com>
Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
	linux-kernel@vger.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Robin Holt <holt@sgi.com>
Subject: Re: [PATCH 0/4] De-couple sysfs memory directories from memory sections
Date: Thu, 20 Jan 2011 08:45:55 -0800	[thread overview]
Message-ID: <20110120164555.GA30922@kroah.com> (raw)
In-Reply-To: <4D386498.9080201@austin.ibm.com>

On Thu, Jan 20, 2011 at 10:36:40AM -0600, Nathan Fontenot wrote:
> The root of this issue is in sysfs directory creation. Every time
> a directory is created a string compare is done against sibling
> directories ( see sysfs_find_dirent() ) to ensure we do not create 
> duplicates.  The list of directory nodes in sysfs is kept as an
> unsorted list which results in this being an exponentially longer
> operation as the number of directories are created.

Again, are you sure about this?  I thought we resolved this issue in the
past, but you were going to check it.  Did you?

thanks,

greg k-h

WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <greg@kroah.com>
To: Nathan Fontenot <nfont@austin.ibm.com>
Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
	linux-kernel@vger.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Robin Holt <holt@sgi.com>
Subject: Re: [PATCH 0/4] De-couple sysfs memory directories from memory sections
Date: Thu, 20 Jan 2011 08:45:55 -0800	[thread overview]
Message-ID: <20110120164555.GA30922@kroah.com> (raw)
In-Reply-To: <4D386498.9080201@austin.ibm.com>

On Thu, Jan 20, 2011 at 10:36:40AM -0600, Nathan Fontenot wrote:
> The root of this issue is in sysfs directory creation. Every time
> a directory is created a string compare is done against sibling
> directories ( see sysfs_find_dirent() ) to ensure we do not create 
> duplicates.  The list of directory nodes in sysfs is kept as an
> unsorted list which results in this being an exponentially longer
> operation as the number of directories are created.

Again, are you sure about this?  I thought we resolved this issue in the
past, but you were going to check it.  Did you?

thanks,

greg k-h

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  parent reply	other threads:[~2011-01-20 16:47 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-20 16:36 [PATCH 0/4] De-couple sysfs memory directories from memory sections Nathan Fontenot
2011-01-20 16:36 ` Nathan Fontenot
2011-01-20 16:43 ` [PATCH 1/4] Allow memory blocks to span multiple " Nathan Fontenot
2011-01-20 16:43   ` Nathan Fontenot
2011-01-20 16:44 ` [PATCH 2/4] Update phys_index to [start|end]_section_nr Nathan Fontenot
2011-01-20 16:44   ` Nathan Fontenot
2011-01-20 16:45 ` [PATCH 3/4]Define memory_block_size_bytes for powerpc/pseries Nathan Fontenot
2011-01-20 16:45   ` Nathan Fontenot
2011-02-06 23:39   ` Benjamin Herrenschmidt
2011-02-06 23:39     ` Benjamin Herrenschmidt
2011-02-06 23:39     ` Benjamin Herrenschmidt
2011-02-07  1:42     ` Greg KH
2011-02-07  1:42       ` Greg KH
2011-02-07  1:42       ` Greg KH
2011-01-20 16:45 ` Greg KH [this message]
2011-01-20 16:45   ` [PATCH 0/4] De-couple sysfs memory directories from memory sections Greg KH
2011-01-20 16:51   ` Nathan Fontenot
2011-01-20 16:51     ` Nathan Fontenot
2011-01-20 17:25     ` Greg KH
2011-01-20 17:25       ` Greg KH
2011-01-20 17:09   ` Dave Hansen
2011-01-20 17:09     ` Dave Hansen
2011-01-20 17:09     ` Dave Hansen
2011-01-20 16:46 ` [PATCH 4/4] Define memory_block_size_bytes for x86_64 with CONFIG_X86_UV Nathan Fontenot
2011-01-20 16:46   ` Nathan Fontenot
  -- strict thread matches above, loose matches on Subject: below --
2011-01-10 18:08 [PATCH 0/4] De-couple sysfs memory directories from memory sections Nathan Fontenot
2011-01-10 18:08 ` Nathan Fontenot
2011-01-10 18:08 ` Nathan Fontenot
2011-01-10 18:44 ` Greg KH
2011-01-10 18:44   ` Greg KH
2011-01-10 18:44   ` Greg KH
2011-01-10 18:47   ` Nathan Fontenot
2011-01-10 18:47     ` Nathan Fontenot
2011-01-10 18:47     ` Nathan Fontenot
2011-01-10 19:11     ` Robin Holt
2011-01-10 19:11       ` Robin Holt
2011-01-10 19:11       ` Robin Holt

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