1TAG_PAGES_FOR_WRITEB(9)   Memory Management in Linux   TAG_PAGES_FOR_WRITEB(9)
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NAME

6       tag_pages_for_writeback - tag pages to be written by write_cache_pages
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SYNOPSIS

9       void tag_pages_for_writeback(struct address_space * mapping,
10                                    pgoff_t start, pgoff_t end);
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ARGUMENTS

13       mapping
14           address space structure to write
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16       start
17           starting page index
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19       end
20           ending page index (inclusive)
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DESCRIPTION

23       This function scans the page range from start to end (inclusive) and
24       tags all pages that have DIRTY tag set with a special TOWRITE tag. The
25       idea is that write_cache_pages (or whoever calls this function) will
26       then use TOWRITE tag to identify pages eligible for writeback. This
27       mechanism is used to avoid livelocking of writeback by a process
28       steadily creating new dirty pages in the file (thus it is important for
29       this function to be quick so that it can tag pages faster than a
30       dirtying process can create them).
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33Kernel Hackers Manual 3.10         June 2019           TAG_PAGES_FOR_WRITEB(9)
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