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author | Seth Jennings <sjenning@linux.vnet.ibm.com> | 2013-04-30 02:08:34 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 02:54:38 +0400 |
commit | 2f772e6cadf8ad8fca38927b17e6be028be669f5 (patch) | |
tree | 5eac4cfd72c6e8e9b4d48ad7463cdf1a8b97f7b4 /README | |
parent | e8420a8ece80b3fe810415ecf061d54ca7fab266 (diff) | |
download | linux-2f772e6cadf8ad8fca38927b17e6be028be669f5.tar.xz |
mm: break up swap_writepage() for frontswap backends
swap_writepage() is currently where frontswap hooks into the swap write
path to capture pages with the frontswap_store() function. However, if
a frontswap backend wants to "resume" the writeback of a page to the
swap device, it can't call swap_writepage() as the page will simply
reenter the backend.
This patch separates swap_writepage() into a top and bottom half, the
bottom half named __swap_writepage() to allow a frontswap backend, like
zswap, to resume writeback beyond the frontswap_store() hook.
__add_to_swap_cache() is also made non-static so that the page for which
writeback is to be resumed can be added to the swap cache.
Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions