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Date: Thu, 07 Mar 2002 19:02:21 -0800
From: Andrew Morton <akpm@zip.com.au>
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To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
CC: Dave Hansen <haveblue@us.ibm.com>, linux-kernel@vger.kernel.org
Subject: Re: truncate_list_pages()  BUG and confusion
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"Martin J. Bligh" wrote:
> 
> Where did truncate_list_pages unlock it?

                                if (*partial && (offset + 1) == start) {
                                        truncate_partial_page(page, *partial);
                                        *partial = 0;
                                } else 
                                        truncate_complete_page(page);

                                UnlockPage(page);
                        } else
                                wait_on_page(page);

It's either unlocked directly, or we wait for whoever locked
it (presumably I/O) to unlock it.

-