linux-kernel - Re: [RFC PATCH 20/26] UBIFS: add VFS operations

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Message-ID: <84144f020804010508k3099b2bagf2f1c0d2747a983@mail.gmail.com>
Date:	Tue, 1 Apr 2008 15:08:36 +0300
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Artem Bityutskiy" <Artem.Bityutskiy@...ia.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Adrian Hunter" <ext-adrian.hunter@...ia.com>
Subject: Re: [RFC PATCH 20/26] UBIFS: add VFS operations

Hi Artem,

On Thu, Mar 27, 2008 at 5:55 PM, Artem Bityutskiy
<Artem.Bityutskiy@...ia.com> wrote:
>  +static int ubifs_set_page_dirty(struct page *page)
>  +{
>  +       /*
>  +        * An attempt to dirty a page without budgeting for it - should not
>  +        * happen.
>  +        */
>  +       ubifs_assert(0);
>  +       return __set_page_dirty_nobuffers(page);
>  +}
>  +
>  +static int ubifs_releasepage(struct page *page, gfp_t unused_gfp_flags)
>  +{
>  +       /*
>  +        * An attempt to release a dirty page without budgeting for it - should
>  +        * not happen.
>  +        */
>  +       ubifs_assert(PageLocked(page));
>  +       if (PageWriteback(page))
>  +               return 0;
>  +       ubifs_assert(PagePrivate(page));
>  +       ubifs_assert(0);
>  +       ClearPagePrivate(page);
>  +       ClearPageChecked(page);
>  +       return 1;
>  +}

So you don't expect the VM to ever call these functions? Why?

                        Pekka
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