Messages in this thread | | | Date | Tue, 3 Jan 2023 04:57:30 +0000 | From | Thomas Weißschuh <> | Subject | Re: [PATCH v7 0/6] Implement writeback for zsmalloc |
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Hi,
On Mon, Nov 28, 2022 at 11:16:09AM -0800, Nhat Pham wrote: > Unlike other zswap's allocators such as zbud or z3fold, zsmalloc > currently lacks the writeback mechanism. This means that when the zswap > pool is full, it will simply reject further allocations, and the pages > will be written directly to swap. > > This series of patches implements writeback for zsmalloc. When the zswap > pool becomes full, zsmalloc will attempt to evict all the compressed > objects in the least-recently used zspages.
Then this part of Documentation/admin-guide/mm/zswap.rst should probably also be updated at some point:
However, zsmalloc does not implement compressed page eviction, so once zswap fills it cannot evict the oldest page, it can only reject new pages.
Thomas
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