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[2a03:2880:ff:1::face:b00c]) by smtp.gmail.com with ESMTPSA id y4-20020a17090322c400b0016f196209c9sm1645420plg.123.2022.11.17.08.38.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Nov 2022 08:38:46 -0800 (PST) From: Nhat Pham To: akpm@linux-foundation.org Cc: hannes@cmpxchg.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, minchan@kernel.org, ngupta@vflare.org, senozhatsky@chromium.org, sjenning@redhat.com, ddstreet@ieee.org, vitaly.wool@konsulko.com Subject: [PATCH v4 4/5] zsmalloc: Add ops fields to zs_pool to store evict handlers Date: Thu, 17 Nov 2022 08:38:38 -0800 Message-Id: <20221117163839.230900-5-nphamcs@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221117163839.230900-1-nphamcs@gmail.com> References: <20221117163839.230900-1-nphamcs@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This adds fields to zs_pool to store evict handlers for writeback, analogous to the zbud allocator. Signed-off-by: Nhat Pham --- mm/zsmalloc.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 2557b55ec767..776d0e15a401 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -225,6 +225,12 @@ struct link_free { }; }; +struct zs_pool; + +struct zs_ops { + int (*evict)(struct zs_pool *pool, unsigned long handle); +}; + struct zs_pool { const char *name; @@ -242,6 +248,9 @@ struct zs_pool { #ifdef CONFIG_ZPOOL /* List tracking the zspages in LRU order by most recently added object */ struct list_head lru; + const struct zs_ops *ops; + struct zpool *zpool; + const struct zpool_ops *zpool_ops; #endif #ifdef CONFIG_ZSMALLOC_STAT @@ -385,6 +394,18 @@ static void record_obj(unsigned long handle, unsigned long obj) #ifdef CONFIG_ZPOOL +static int zs_zpool_evict(struct zs_pool *pool, unsigned long handle) +{ + if (pool->zpool && pool->zpool_ops && pool->zpool_ops->evict) + return pool->zpool_ops->evict(pool->zpool, handle); + else + return -ENOENT; +} + +static const struct zs_ops zs_zpool_ops = { + .evict = zs_zpool_evict +}; + static void *zs_zpool_create(const char *name, gfp_t gfp, const struct zpool_ops *zpool_ops, struct zpool *zpool) @@ -394,7 +415,19 @@ static void *zs_zpool_create(const char *name, gfp_t gfp, * different contexts and its caller must provide a valid * gfp mask. */ - return zs_create_pool(name); + struct zs_pool *pool = zs_create_pool(name); + + if (pool) { + pool->zpool = zpool; + pool->zpool_ops = zpool_ops; + + if (zpool_ops) + pool->ops = &zs_zpool_ops; + else + pool->ops = NULL; + } + + return pool; } static void zs_zpool_destroy(void *pool) -- 2.30.2