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Tue, 08 Nov 2022 12:45:33 -0800 (PST) Date: Tue, 8 Nov 2022 15:45:35 -0500 From: Johannes Weiner To: Nhat Pham Cc: akpm@linux-foundation.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: Re: [PATCH v3 0/5] Implement writeback for zsmalloc Message-ID: References: <20221108193207.3297327-1-nphamcs@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221108193207.3297327-1-nphamcs@gmail.com> X-Stat-Signature: s9jzd6t3cq3aitz1q7icnaj81nboxrbp X-Rspamd-Queue-Id: 09108C0010 Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=cmpxchg-org.20210112.gappssmtp.com header.s=20210112 header.b=kwa5wqAu; spf=pass (imf10.hostedemail.com: domain of hannes@cmpxchg.org designates 209.85.210.170 as permitted sender) smtp.mailfrom=hannes@cmpxchg.org X-Rspam-User: X-Rspamd-Server: rspam11 X-HE-Tag: 1667940388-345655 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: On Tue, Nov 08, 2022 at 11:32:02AM -0800, Nhat Pham wrote: > Changelog: > v3: > * Set pool->ops = NULL when pool->zpool_ops is null (patch 4). > * Stop holding pool's lock when calling lock_zspage() (patch 5). > (suggested by Sergey Senozhatsky) > * Stop holding pool's lock when checking pool->ops and retries. > (patch 5) (suggested by Sergey Senozhatsky) > * Fix formatting issues (.shrink, extra spaces in casting removed). > (patch 5) (suggested by Sergey Senozhatsky) > > v2: > * Add missing CONFIG_ZPOOL ifdefs (patch 5) > (detected by kernel test robot). > > 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. > > There are 5 patches in this series: For the series: Acked-by: Johannes Weiner