Date: Wed, 11 Aug 2004 17:43:08 +0200 From: Max Laier <max@love2party.net> To: freebsd-current@freebsd.org Cc: Bosko Milekic <bmilekic@FreeBSD.org> Subject: Re: UMA questions Message-ID: <200408111743.16323.max@love2party.net> In-Reply-To: <20040811152950.GA17794@freefall.freebsd.org> References: <20040811152950.GA17794@freefall.freebsd.org>
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--Boundary-02=_U6jGB/JDDmcN0xq Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Wednesday 11 August 2004 17:29, Bosko Milekic wrote: > >2. What does the flag UMA_ZONE_ZINIT do exactly? > > It initializes zone-allocated objects to zero. This happens as objects > are first allocated (i.e., slabs are allocated) and before placement > into the slab cache. Unfortunately, I am not sure this works very well > unless you also make sure to zero them as they are returned (dtor), > which is a shitty model. I guess the motivation behind UMA_ZONE_ZINIT is to prevent an information l= eak=20 from other parts of the system. i.e. I want memory that I can pass to users= =20 or the net w/o having to fear that it holds my password or something. Once the slab is in the cache, i.e. it belongs to me, I don't care anymore. =2D-=20 /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News --Boundary-02=_U6jGB/JDDmcN0xq Content-Type: application/pgp-signature Content-Description: signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (FreeBSD) iD8DBQBBGj6UXyyEoT62BG0RAkygAJ95IMg41rKma+WKRve6xKR16wnk3gCcDorJ DHZjGrc7yVsz4ItxU9gzZcU= =Uecs -----END PGP SIGNATURE----- --Boundary-02=_U6jGB/JDDmcN0xq--
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