| From: Nhat Pham <nphamcs@gmail.com> |
| Subject: Docs/admin-guide/mm/zswap: remove zsmalloc's lack of writeback warning |
| Date: Fri, 6 Jan 2023 14:00:16 -0800 |
| |
| Writeback has been implemented for zsmalloc, so this warning no longer |
| holds. |
| |
| Link: https://lkml.kernel.org/r/20230106220016.172303-1-nphamcs@gmail.com |
| Fixes: 9997bc017549a ("zsmalloc: implement writeback mechanism for zsmalloc") |
| Suggested-by: Thomas Weißschuh <linux@weissschuh.net> |
| Signed-off-by: Nhat Pham <nphamcs@gmail.com> |
| Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> |
| Cc: Johannes Weiner <hannes@cmpxchg.org> |
| Cc: Jonathan Corbet <corbet@lwn.net> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| Documentation/admin-guide/mm/zswap.rst | 4 +--- |
| 1 file changed, 1 insertion(+), 3 deletions(-) |
| |
| --- a/Documentation/admin-guide/mm/zswap.rst~docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning |
| +++ a/Documentation/admin-guide/mm/zswap.rst |
| @@ -70,9 +70,7 @@ e.g. ``zswap.zpool=zbud``. It can also b |
| The zbud type zpool allocates exactly 1 page to store 2 compressed pages, which |
| means the compression ratio will always be 2:1 or worse (because of half-full |
| zbud pages). The zsmalloc type zpool has a more complex compressed page |
| -storage method, and it can achieve greater storage densities. However, |
| -zsmalloc does not implement compressed page eviction, so once zswap fills it |
| -cannot evict the oldest page, it can only reject new pages. |
| +storage method, and it can achieve greater storage densities. |
| |
| When a swap page is passed from frontswap to zswap, zswap maintains a mapping |
| of the swap entry, a combination of the swap type and swap offset, to the zpool |
| _ |
