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Tue, 30 Apr 2024 10:01:22 -0400 X-MC-Unique: T9vf6YSBORykhuQrbF8vEA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5892A18065B5; Tue, 30 Apr 2024 14:01:20 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6AC5D581C8; Tue, 30 Apr 2024 14:01:17 +0000 (UTC) From: David Howells To: Christian Brauner , Jeff Layton , Gao Xiang , Dominique Martinet Cc: David Howells , Matthew Wilcox , Steve French , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Eric Van Hensbergen , Ilya Dryomov , netfs@lists.linux.dev, linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 04/22] netfs: Remove deprecated use of PG_private_2 as a second writeback flag Date: Tue, 30 Apr 2024 15:00:35 +0100 Message-ID: <20240430140056.261997-5-dhowells@redhat.com> In-Reply-To: <20240430140056.261997-1-dhowells@redhat.com> References: <20240430140056.261997-1-dhowells@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.1 X-Rspam-User: X-Rspamd-Queue-Id: 9686112002C X-Rspamd-Server: rspam06 X-Stat-Signature: y63bj8newergzmbwpdt8u1yxttf3hkpn X-HE-Tag: 1714485686-526412 X-HE-Meta: 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 mwqFln1G Lv/WRe9s0qHX3qZWxxdLBogJNhx4YK1nC39T5xaRIrb8yjm4LTdWqOMno701DtiZV8PpdCUO20rlecxs6UK1hnJioNOkLKldukMUBVSgWiwD8z4xiyEhc75CBjqsnBfWT/wUzKrgEsNWVMLWBJ0rOhMP6Y14E04t0rhO/V4SiMjgVvr5GiAp0U2Hewh7sNgevFVMgfsBHi8KxnED3yRVfhr8oXXNVF0IMEKjgyIPegIp90h3xY2UxbrKolEmtkKbxWHuy9AsE4zt/Z4HZ57Mqah/WZq9phCQfsYYHshwmKlfEVaU2yU8Ktl+8vt8NxAQ+80yJOypNc+6CflmH1eqrRSaInp3dCIk7rS2+B7y1+8yFyKfU+vsTc3wbKX4IocZDBYtzelPHQdLRC2V9D99EQN2Thw== 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: Remove the deprecated use of PG_private_2 in netfslib. Signed-off-by: David Howells Reviewed-by: Jeff Layton cc: Matthew Wilcox (Oracle) cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org --- fs/ceph/addr.c | 19 +----- fs/netfs/buffered_read.c | 8 +-- fs/netfs/io.c | 144 --------------------------------------- 3 files changed, 2 insertions(+), 169 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 18ddacb00511..74bfd10b1b1a 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -498,11 +498,6 @@ const struct netfs_request_ops ceph_netfs_ops = { }; #ifdef CONFIG_CEPH_FSCACHE -static void ceph_set_page_fscache(struct page *page) -{ - folio_start_private_2(page_folio(page)); /* [DEPRECATED] */ -} - static void ceph_fscache_write_terminated(void *priv, ssize_t error, bool was_async) { struct inode *inode = priv; @@ -520,10 +515,6 @@ static void ceph_fscache_write_to_cache(struct inode *inode, u64 off, u64 len, b ceph_fscache_write_terminated, inode, true, caching); } #else -static inline void ceph_set_page_fscache(struct page *page) -{ -} - static inline void ceph_fscache_write_to_cache(struct inode *inode, u64 off, u64 len, bool caching) { } @@ -715,8 +706,6 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc) len = wlen; set_page_writeback(page); - if (caching) - ceph_set_page_fscache(page); ceph_fscache_write_to_cache(inode, page_off, len, caching); if (IS_ENCRYPTED(inode)) { @@ -800,8 +789,6 @@ static int ceph_writepage(struct page *page, struct writeback_control *wbc) return AOP_WRITEPAGE_ACTIVATE; } - folio_wait_private_2(page_folio(page)); /* [DEPRECATED] */ - err = writepage_nounlock(page, wbc); if (err == -ERESTARTSYS) { /* direct memory reclaimer was killed by SIGKILL. return 0 @@ -1075,8 +1062,7 @@ static int ceph_writepages_start(struct address_space *mapping, unlock_page(page); break; } - if (PageWriteback(page) || - PagePrivate2(page) /* [DEPRECATED] */) { + if (PageWriteback(page)) { if (wbc->sync_mode == WB_SYNC_NONE) { doutc(cl, "%p under writeback\n", page); unlock_page(page); @@ -1084,7 +1070,6 @@ static int ceph_writepages_start(struct address_space *mapping, } doutc(cl, "waiting on writeback %p\n", page); wait_on_page_writeback(page); - folio_wait_private_2(page_folio(page)); /* [DEPRECATED] */ } if (!clear_page_dirty_for_io(page)) { @@ -1269,8 +1254,6 @@ static int ceph_writepages_start(struct address_space *mapping, } set_page_writeback(page); - if (caching) - ceph_set_page_fscache(page); len += thp_size(page); } ceph_fscache_write_to_cache(inode, offset, len, caching); diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c index b3fd6e1fa322..1622cce535a3 100644 --- a/fs/netfs/buffered_read.c +++ b/fs/netfs/buffered_read.c @@ -464,7 +464,7 @@ int netfs_write_begin(struct netfs_inode *ctx, if (!netfs_is_cache_enabled(ctx) && netfs_skip_folio_read(folio, pos, len, false)) { netfs_stat(&netfs_n_rh_write_zskip); - goto have_folio_no_wait; + goto have_folio; } rreq = netfs_alloc_request(mapping, file, @@ -505,12 +505,6 @@ int netfs_write_begin(struct netfs_inode *ctx, netfs_put_request(rreq, false, netfs_rreq_trace_put_return); have_folio: - if (test_bit(NETFS_ICTX_USE_PGPRIV2, &ctx->flags)) { - ret = folio_wait_private_2_killable(folio); - if (ret < 0) - goto error; - } -have_folio_no_wait: *_folio = folio; _leave(" = 0"); return 0; diff --git a/fs/netfs/io.c b/fs/netfs/io.c index 60a19f96e0ce..2641238aae82 100644 --- a/fs/netfs/io.c +++ b/fs/netfs/io.c @@ -98,146 +98,6 @@ static void netfs_rreq_completed(struct netfs_io_request *rreq, bool was_async) netfs_put_request(rreq, was_async, netfs_rreq_trace_put_complete); } -/* - * [DEPRECATED] Deal with the completion of writing the data to the cache. We - * have to clear the PG_fscache bits on the folios involved and release the - * caller's ref. - * - * May be called in softirq mode and we inherit a ref from the caller. - */ -static void netfs_rreq_unmark_after_write(struct netfs_io_request *rreq, - bool was_async) -{ - struct netfs_io_subrequest *subreq; - struct folio *folio; - pgoff_t unlocked = 0; - bool have_unlocked = false; - - rcu_read_lock(); - - list_for_each_entry(subreq, &rreq->subrequests, rreq_link) { - XA_STATE(xas, &rreq->mapping->i_pages, subreq->start / PAGE_SIZE); - - xas_for_each(&xas, folio, (subreq->start + subreq->len - 1) / PAGE_SIZE) { - if (xas_retry(&xas, folio)) - continue; - - /* We might have multiple writes from the same huge - * folio, but we mustn't unlock a folio more than once. - */ - if (have_unlocked && folio->index <= unlocked) - continue; - unlocked = folio_next_index(folio) - 1; - trace_netfs_folio(folio, netfs_folio_trace_end_copy); - folio_end_private_2(folio); - have_unlocked = true; - } - } - - rcu_read_unlock(); - netfs_rreq_completed(rreq, was_async); -} - -static void netfs_rreq_copy_terminated(void *priv, ssize_t transferred_or_error, - bool was_async) /* [DEPRECATED] */ -{ - struct netfs_io_subrequest *subreq = priv; - struct netfs_io_request *rreq = subreq->rreq; - - if (IS_ERR_VALUE(transferred_or_error)) { - netfs_stat(&netfs_n_rh_write_failed); - trace_netfs_failure(rreq, subreq, transferred_or_error, - netfs_fail_copy_to_cache); - } else { - netfs_stat(&netfs_n_rh_write_done); - } - - trace_netfs_sreq(subreq, netfs_sreq_trace_write_term); - - /* If we decrement nr_copy_ops to 0, the ref belongs to us. */ - if (atomic_dec_and_test(&rreq->nr_copy_ops)) - netfs_rreq_unmark_after_write(rreq, was_async); - - netfs_put_subrequest(subreq, was_async, netfs_sreq_trace_put_terminated); -} - -/* - * [DEPRECATED] Perform any outstanding writes to the cache. We inherit a ref - * from the caller. - */ -static void netfs_rreq_do_write_to_cache(struct netfs_io_request *rreq) -{ - struct netfs_cache_resources *cres = &rreq->cache_resources; - struct netfs_io_subrequest *subreq, *next, *p; - struct iov_iter iter; - int ret; - - trace_netfs_rreq(rreq, netfs_rreq_trace_copy); - - /* We don't want terminating writes trying to wake us up whilst we're - * still going through the list. - */ - atomic_inc(&rreq->nr_copy_ops); - - list_for_each_entry_safe(subreq, p, &rreq->subrequests, rreq_link) { - if (!test_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags)) { - list_del_init(&subreq->rreq_link); - netfs_put_subrequest(subreq, false, - netfs_sreq_trace_put_no_copy); - } - } - - list_for_each_entry(subreq, &rreq->subrequests, rreq_link) { - /* Amalgamate adjacent writes */ - while (!list_is_last(&subreq->rreq_link, &rreq->subrequests)) { - next = list_next_entry(subreq, rreq_link); - if (next->start != subreq->start + subreq->len) - break; - subreq->len += next->len; - list_del_init(&next->rreq_link); - netfs_put_subrequest(next, false, - netfs_sreq_trace_put_merged); - } - - ret = cres->ops->prepare_write(cres, &subreq->start, &subreq->len, - subreq->len, rreq->i_size, true); - if (ret < 0) { - trace_netfs_failure(rreq, subreq, ret, netfs_fail_prepare_write); - trace_netfs_sreq(subreq, netfs_sreq_trace_write_skip); - continue; - } - - iov_iter_xarray(&iter, ITER_SOURCE, &rreq->mapping->i_pages, - subreq->start, subreq->len); - - atomic_inc(&rreq->nr_copy_ops); - netfs_stat(&netfs_n_rh_write); - netfs_get_subrequest(subreq, netfs_sreq_trace_get_copy_to_cache); - trace_netfs_sreq(subreq, netfs_sreq_trace_write); - cres->ops->write(cres, subreq->start, &iter, - netfs_rreq_copy_terminated, subreq); - } - - /* If we decrement nr_copy_ops to 0, the usage ref belongs to us. */ - if (atomic_dec_and_test(&rreq->nr_copy_ops)) - netfs_rreq_unmark_after_write(rreq, false); -} - -static void netfs_rreq_write_to_cache_work(struct work_struct *work) /* [DEPRECATED] */ -{ - struct netfs_io_request *rreq = - container_of(work, struct netfs_io_request, work); - - netfs_rreq_do_write_to_cache(rreq); -} - -static void netfs_rreq_write_to_cache(struct netfs_io_request *rreq) /* [DEPRECATED] */ -{ - rreq->work.func = netfs_rreq_write_to_cache_work; - if (!queue_work(system_unbound_wq, &rreq->work)) - BUG(); -} - /* * Handle a short read. */ @@ -410,10 +270,6 @@ static void netfs_rreq_assess(struct netfs_io_request *rreq, bool was_async) clear_bit_unlock(NETFS_RREQ_IN_PROGRESS, &rreq->flags); wake_up_bit(&rreq->flags, NETFS_RREQ_IN_PROGRESS); - if (test_bit(NETFS_RREQ_COPY_TO_CACHE, &rreq->flags) && - test_bit(NETFS_RREQ_USE_PGPRIV2, &rreq->flags)) - return netfs_rreq_write_to_cache(rreq); - netfs_rreq_completed(rreq, was_async); }