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TAG_PAGES_FOR_WRITEB(9)	  Memory Management in Linux   TAG_PAGES_FOR_WRITEB(9)

NAME
       tag_pages_for_writeback - tag pages to be written by write_cache_pages

SYNOPSIS
       void tag_pages_for_writeback(struct address_space * mapping,
				    pgoff_t start, pgoff_t end);

ARGUMENTS
       mapping
	   address space structure to write

       start
	   starting page index

       end
	   ending page index (inclusive)

DESCRIPTION
       This function scans the page range from start to end (inclusive) and
       tags all pages that have DIRTY tag set with a special TOWRITE tag. The
       idea is that write_cache_pages (or whoever calls this function) will
       then use TOWRITE tag to identify pages eligible for writeback. This
       mechanism is used to avoid livelocking of writeback by a process
       steadily creating new dirty pages in the file (thus it is important for
       this function to be quick so that it can tag pages faster than a
       dirtying process can create them).

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013	       TAG_PAGES_FOR_WRITEB(9)

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