Re: Asynchronous I/O

[Andrea Arcangeli <andrea@suse.de>]

On Thu, 9 Sep 1999, Steven Hand wrote:

>   b) should it work? 

Your plain suggestion is not ok becaue you end freeing the page two times,
one in filemap_write_page and one in kpiod so you'll also remove the page
from the page cache if you avoided MS_INVALIDED and you'll corrupt memory
with MS_INVALIDATE. So you should do something like:

	error = filemap_write_page(vma, address - vma->vm_start + 
		vma->vm_offset, page, !(flags & MS_ASYNC));
	if (!(flags & MS_ASYNC))
		page_cache_free(page);

Andrea

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