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[2a03:2880:ff:17::face:b00c]) by smtp.gmail.com with ESMTPSA id 126-20020a620484000000b0056c349f5c70sm2565942pfe.79.2022.10.26.13.06.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Oct 2022 13:06:18 -0700 (PDT) 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 4/5] zsmalloc: Add ops fields to zs_pool to store evict handlers Date: Wed, 26 Oct 2022 13:06:12 -0700 Message-Id: <20221026200613.1031261-5-nphamcs@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221026200613.1031261-1-nphamcs@gmail.com> References: <20221026200613.1031261-1-nphamcs@gmail.com> MIME-Version: 1.0 ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666814779; a=rsa-sha256; cv=none; b=eYhvxu+MaVV0fri8OG6CP3uBo15XsfEO0/bw77XdTvwZZ/SE4AG4r2DJ0jViNr0jZRalFH DRLbUyxLD3Z5UJ8Gw+oZDThDRObhdmvZrfU5LPZGQ1nt0qzCJTUvQpqlvgiPdf54gy/h2r 6c9iCgPTls+bRbQGUbfbfT4S+EP5us4= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=M6ji8O15; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf11.hostedemail.com: domain of nphamcs@gmail.com designates 209.85.216.51 as permitted sender) smtp.mailfrom=nphamcs@gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666814779; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=HSvm1OVp5HfWSmnERqwnki4xcSgkSWyRsvH49QuFnfE=; b=Qe3uW0GpSFSG40bWKOThsdNzBWB3Fn5WShvJKBChQl3gj939Jk8TQIIQ3/EfvtTSl7rzpl P99DLh4Jw9huXVTcnEeo2kUsfVNhlBxh6uyU4mYww/UXsTExSd2pRiUpPLsndnLl8iV6pw cV5wlpZkPx5UNRX2Ag/iWLNxPRd6/jg= X-Rspam-User: Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=M6ji8O15; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf11.hostedemail.com: domain of nphamcs@gmail.com designates 209.85.216.51 as permitted sender) smtp.mailfrom=nphamcs@gmail.com X-Rspamd-Server: rspam11 X-Stat-Signature: 8xjzgu5ewi1jjmubrjtddbmcoaz3dq58 X-Rspamd-Queue-Id: C71644003A X-HE-Tag: 1666814779-630837 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This adds fields to zs_pool to store evict handlers for writeback, analogous to the zbud allocator. Signed-off-by: Nhat Pham Acked-by: Johannes Weiner --- mm/zsmalloc.c | 36 +++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 600c40121544..76ff2ed839d0 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 +248,12 @@ struct zs_pool { /* List tracking the zspages in LRU order by most recently added object */ struct list_head lru; +#ifdef CONFIG_ZPOOL + const struct zs_ops *ops; + struct zpool *zpool; + const struct zpool_ops *zpool_ops; +#endif + #ifdef CONFIG_ZSMALLOC_STAT struct dentry *stat_dentry; #endif @@ -379,6 +391,18 @@ 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) @@ -388,7 +412,17 @@ 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; + } + + return pool; } static void zs_zpool_destroy(void *pool)