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Tue, 14 Oct 2025 12:10:31 +0000 (GMT) From: Kundan Kumar To: jaegeuk@kernel.org, chao@kernel.org, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, miklos@szeredi.hu, agruenba@redhat.com, trondmy@kernel.org, anna@kernel.org, akpm@linux-foundation.org, willy@infradead.org, mcgrof@kernel.org, clm@meta.com, david@fromorbit.com, amir73il@gmail.com, axboe@kernel.dk, hch@lst.de, ritesh.list@gmail.com, djwong@kernel.org, dave@stgolabs.net, wangyufei@vivo.com Cc: linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, gfs2@lists.linux.dev, linux-nfs@vger.kernel.org, linux-mm@kvack.org, gost.dev@samsung.com, kundan.kumar@samsung.com, anuj20.g@samsung.com, vishak.g@samsung.com, joshi.k@samsung.com Subject: [PATCH v2 05/16] writeback: modify bdi_writeback search logic to search across all wb ctxs Date: Tue, 14 Oct 2025 17:38:34 +0530 Message-Id: <20251014120845.2361-6-kundan.kumar@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20251014120845.2361-1-kundan.kumar@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CMS-MailID: 20251014121036epcas5p17c607955db032d076daa2e5cfecfe8ea X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P cpgsPolicy: CPGSC10-542,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20251014121036epcas5p17c607955db032d076daa2e5cfecfe8ea References: <20251014120845.2361-1-kundan.kumar@samsung.com> X-Rspam-User: X-Rspamd-Queue-Id: B960480014 X-Rspamd-Server: rspam02 X-Stat-Signature: r9zupjbujid4fdgionhi8reanmatnn8j X-HE-Tag: 1760443841-350480 X-HE-Meta: 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 o/hBgL++ I1js3Q9wsXoG21/VqZuVsXjgkh/hXethJdr1+S3h1HxiHKUFxZmxasPm/3RrJ/ckTJW4sSiL2jk9KumzZmv0CwlULVPHqGe4RdEtjyCoLXy+ZrAqrSlJ1yJSJBXgOdFWtVVLbMN2rqCHkihbxiiYzfQw+cDmYS7nmnrnilUE9KXMG5Whke64DO6mUrVIOVb1JmRC0Q2Q3UDjKddyPimzExmGdkfx5QZ5CPm1cguzWnek40Hz4K9t4ISwVqA== 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: List-Subscribe: List-Unsubscribe: Since we have multiple cgwb per bdi, embedded in writeback_ctx now, we iterate over all of them to find the associated writeback. Signed-off-by: Kundan Kumar Signed-off-by: Anuj Gupta --- fs/fs-writeback.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 56c048e22f72..93f8ea340247 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -1090,7 +1090,8 @@ int cgroup_writeback_by_id(u64 bdi_id, int memcg_id, { struct backing_dev_info *bdi; struct cgroup_subsys_state *memcg_css; - struct bdi_writeback *wb; + struct bdi_writeback *wb = NULL; + struct bdi_writeback_ctx *bdi_wb_ctx; struct wb_writeback_work *work; unsigned long dirty; int ret; @@ -1114,7 +1115,11 @@ int cgroup_writeback_by_id(u64 bdi_id, int memcg_id, * And find the associated wb. If the wb isn't there already * there's nothing to flush, don't create one. */ - wb = wb_get_lookup(bdi->wb_ctx[0], memcg_css); + for_each_bdi_wb_ctx(bdi, bdi_wb_ctx) { + wb = wb_get_lookup(bdi_wb_ctx, memcg_css); + if (wb) + break; + } if (!wb) { ret = -ENOENT; goto out_css_put; -- 2.25.1