From: Matthew Wilcox <matthew@wil.cx>
To: Brian Gerst <bgerst@didntduck.org>
Cc: "Martin K. Petersen" <mkp@wildopensource.com>,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
akpm@osdl.org, tony.luck@intel.com
Subject: Re: [PATCH] General purpose zeroed page slab
Date: Thu, 14 Oct 2004 17:36:37 +0000 [thread overview]
Message-ID: <20041014173637.GQ16153@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <416EB7AD.4040302@didntduck.org>
On Thu, Oct 14, 2004 at 01:30:21PM -0400, Brian Gerst wrote:
> This doesn't work as you expect it does. The constructor is only called
> when a new slab is created, for each new object on the slab. It is
> _not_ run again when an object is freed. So if a page is freed then
> immediately reallocated it will contain garbage.
The user is responsible for zeroing the page before handing it back to
the slab allocator.
--
"Next the statesmen will invent cheap lies, putting the blame upon
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince
himself that the war is just, and will thank God for the better sleep
he enjoys after this process of grotesque self-deception." -- Mark Twain
next prev parent reply other threads:[~2004-10-14 17:36 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-14 16:50 [PATCH] General purpose zeroed page slab Martin K. Petersen
2004-10-14 17:30 ` Brian Gerst
2004-10-14 17:36 ` Matthew Wilcox [this message]
2004-10-14 18:49 ` Dave Jones
2004-10-14 19:08 ` Denis Vlasenko
2004-10-14 19:47 ` Matthew Wilcox
2004-10-14 18:04 ` Andi Kleen
2004-10-14 23:36 ` Adam Heath
2004-10-15 1:18 ` Andi Kleen
2004-10-18 18:06 ` Martin K. Petersen
2004-10-18 18:42 ` Matthew Wilcox
2004-10-18 18:54 ` Martin K. Petersen
2004-10-18 19:06 ` Andi Kleen
2004-10-18 21:06 ` Andi Kleen
2004-10-18 19:03 ` Luck, Tony
2004-10-18 19:14 ` Matthew Wilcox
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