From: Andrew Morton <akpm@digeo.com>
To: David Chow <davidchow@shaolinmicro.com>
Cc: linux-mm@kvack.org
Subject: Re: dirty pages path in kernel
Date: Tue, 28 Jan 2003 11:13:53 -0800 [thread overview]
Message-ID: <20030128111353.3a104e3d.akpm@digeo.com> (raw)
In-Reply-To: <3E36BD6B.6080000@shaolinmicro.com>
David Chow <davidchow@shaolinmicro.com> wrote:
>
> Hi,
>
> If I do the following to an inode mapping page .
>
> 1. Generate a "struct page" from read_cache_page()
> 2. kmap() the page, do some memset() (Dirty the page)
> 3. kunmap() and page_cache_release() the page.
>
The VFS does not know that the page has changed.
You should do:
lock_page(page);
memset()
set_page_dirty(page);
unlock_page(page);
the page will be written to disk on the next kupdate cycle.
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next prev parent reply other threads:[~2003-01-28 19:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-28 17:27 David Chow
2003-01-28 19:13 ` Andrew Morton [this message]
2003-01-28 21:08 ` Andrew Morton
2003-01-29 10:51 ` Nikita Danilov
2003-02-01 9:18 ` David Chow
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