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    SubjectRe: [PATCH] diskquota: 32bit quota tools on 64bit architectures
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    Date
    You can find a half-year back discussions of this patch:

    First attempt: http://lkml.org/lkml/2006/10/19/123
    Second attempt: http://lkml.org/lkml/2006/10/25/57

    I think they will answer your questions.

    Thank you,
    Vasily


    On Fri, 2007-06-15 at 12:03 +0200, Mikael Pettersson wrote:
    > On Fri, 15 Jun 2007 13:01:48 +0400, Vasily Tarasov wrote:
    > > OpenVZ Linux kernel team has discovered the problem
    > > with 32bit quota tools working on 64bit architectures.
    > > In 2.6.10 kernel sys32_quotactl() function was replaced by sys_quotactl() with
    > > the comment "sys_quotactl seems to be 32/64bit clean, enable it for 32bit"
    > > However this isn't right. Look at if_dqblk structure:
    >
    > Your patch only converts ia32 on x86-64 or ia64.
    > What about ppc32-on-ppc64 and sparc32-on-sparc64?
    > And, I guess, mips32-on-mips64?
    >
    > > --- linux-2.6.22-rc4-fixed/fs/quota.c.orig 2007-06-14 15:55:26.000000000 +0400
    > > +++ linux-2.6.22-rc4-fixed/fs/quota.c 2007-06-14 19:50:13.000000000 +0400
    > ...
    > > +#if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
    > > +/*
    > > + * This code works only for 32 bit quota tools over 64 bit OS (x86_64, ia64)
    > > + * and is necessary due to alignment problems.
    > > + */
    >
    > The #ifdef looks way too arch-specific. And isn't there a shared
    > compat.c module somewhere that this should go into?
    >
    > /Mikael

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