The patch titled
Subject: mm: zswap: modify zswap_compress() to accept a page instead of a folio.
has been added to the -mm mm-unstable branch. Its filename is
mm-zswap-modify-zswap_compress-to-accept-a-page-instead-of-a-folio.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-zswap-modify-zswap_compress-to-accept-a-page-instead-of-a-folio.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx>
Subject: mm: zswap: modify zswap_compress() to accept a page instead of a folio.
Date: Mon, 30 Sep 2024 22:32:17 -0700
For zswap_store() to be able to store a large folio by compressing it one
page at a time, zswap_compress() needs to accept a page as input. This
will allow us to iterate through each page in the folio in zswap_store(),
compress it and store it in the zpool.
Link: https://lkml.kernel.org/r/20241001053222.6944-3-kanchana.p.sridhar@xxxxxxxxx
Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx>
Reviewed-by: Nhat Pham <nphamcs@xxxxxxxxx>
Reviewed-by: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Shakeel Butt <shakeel.butt@xxxxxxxxx>
Cc: Usama Arif <usamaarif642@xxxxxxxxx>
Cc: Wajdi Feghali <wajdi.k.feghali@xxxxxxxxx>
Cc: "Zou, Nanhai" <nanhai.zou@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zswap.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/zswap.c~mm-zswap-modify-zswap_compress-to-accept-a-page-instead-of-a-folio
+++ a/mm/zswap.c
@@ -875,7 +875,7 @@ static int zswap_cpu_comp_dead(unsigned
return 0;
}
-static bool zswap_compress(struct folio *folio, struct zswap_entry *entry)
+static bool zswap_compress(struct page *page, struct zswap_entry *entry)
{
struct crypto_acomp_ctx *acomp_ctx;
struct scatterlist input, output;
@@ -893,7 +893,7 @@ static bool zswap_compress(struct folio
dst = acomp_ctx->buffer;
sg_init_table(&input, 1);
- sg_set_folio(&input, folio, PAGE_SIZE, 0);
+ sg_set_page(&input, page, PAGE_SIZE, 0);
/*
* We need PAGE_SIZE * 2 here since there maybe over-compression case,
@@ -1456,7 +1456,7 @@ bool zswap_store(struct folio *folio)
mem_cgroup_put(memcg);
}
- if (!zswap_compress(folio, entry))
+ if (!zswap_compress(&folio->page, entry))
goto put_pool;
entry->swpentry = swp;
_
Patches currently in -mm which might be from kanchana.p.sridhar@xxxxxxxxx are
mm-define-obj_cgroup_get-if-config_memcg-is-not-defined.patch
mm-zswap-modify-zswap_compress-to-accept-a-page-instead-of-a-folio.patch
mm-zswap-rename-zswap_pool_get-to-zswap_pool_tryget.patch
mm-change-count_objcg_event-to-count_objcg_events-for-batch-event-updates.patch
mm-zswap-modify-zswap_stored_pages-to-be-atomic_long_t.patch
mm-zswap-support-large-folios-in-zswap_store.patch
mm-swap-count-successful-large-folio-zswap-stores-in-hugepage-zswpout-stats.patch
