From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CAB48C433DF for ; Mon, 24 Aug 2020 15:18:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7F5D8206B5 for ; Mon, 24 Aug 2020 15:18:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="L4x7nj1u" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7F5D8206B5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 28C446B0027; Mon, 24 Aug 2020 11:18:11 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 23CA96B0028; Mon, 24 Aug 2020 11:18:11 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 152E86B0029; Mon, 24 Aug 2020 11:18:11 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0110.hostedemail.com [216.40.44.110]) by kanga.kvack.org (Postfix) with ESMTP id F0E316B0027 for ; Mon, 24 Aug 2020 11:18:10 -0400 (EDT) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 51778180ACEE4 for ; Mon, 24 Aug 2020 15:18:10 +0000 (UTC) X-FDA: 77185817940.18.wall79_2f1781727054 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin18.hostedemail.com (Postfix) with ESMTP id CBD52100EC698 for ; Mon, 24 Aug 2020 15:17:10 +0000 (UTC) X-HE-Tag: wall79_2f1781727054 X-Filterd-Recvd-Size: 9152 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf11.hostedemail.com (Postfix) with ESMTP for ; Mon, 24 Aug 2020 15:17:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=J5sJnI72bBCHI4QXotnHD2dCMjWGHzbD2S9EGp70gwQ=; b=L4x7nj1ugmStyNhAJUaMfBbrIu SsxvIfUclsXrsKt4SXVFbCC+ZXKe0Udd141G3gDrNZ1Oi1iWKZAVVY3RJvEhj+LpfE4/EMbwwT8Z2 f3Hg8p+3zJ70El/d0gDFlNf4O53JsmyRkFGFlOAgEc2MdI2e6pl2ZyoBN/0aPL00x7dswxKexzt/r dW8EEz98V2/ez2p4ogbEjXOOOxYwuhOuQ0YNpgz6HrORokH/MLaDjrnA4OaduBgtcN+Pee3Chnkkj Fc91HeFXf1HEp4HRhZMXckQEAsAKLmXfMLpcI2nrqKpToVpKC5tdHw6RCXvQczzTQeoDOyesqxVQa XSuenlpA==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kAEDZ-0004Dm-5b; Mon, 24 Aug 2020 15:17:05 +0000 From: "Matthew Wilcox (Oracle)" To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , "Darrick J . Wong" , linux-block@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 09/11] iomap: Support THPs in write paths Date: Mon, 24 Aug 2020 16:16:58 +0100 Message-Id: <20200824151700.16097-10-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200824151700.16097-1-willy@infradead.org> References: <20200824151700.16097-1-willy@infradead.org> MIME-Version: 1.0 X-Rspamd-Queue-Id: CBD52100EC698 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 Content-Transfer-Encoding: quoted-printable 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: Use thp_size() instead of PAGE_SIZE and offset_in_thp() instead of offset_in_page(). Also simplify the logic in iomap_do_writepage() for determining end of file. Signed-off-by: Matthew Wilcox (Oracle) --- fs/iomap/buffered-io.c | 54 ++++++++++++++++++++++++------------------ 1 file changed, 31 insertions(+), 23 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index f43a15aaa381..52d371c59758 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -452,7 +452,7 @@ iomap_is_partially_uptodate(struct page *page, unsign= ed long from, unsigned i; =20 /* Limit range to one page */ - len =3D min_t(unsigned, PAGE_SIZE - from, count); + len =3D min_t(unsigned, thp_size(page) - from, count); =20 /* First and last blocks in range within page */ first =3D from >> inode->i_blkbits; @@ -649,8 +649,8 @@ static ssize_t iomap_write_begin(struct inode *inode,= loff_t pos, loff_t len, else if (iomap->flags & IOMAP_F_BUFFER_HEAD) status =3D __block_write_begin_int(page, pos, len, NULL, srcmap); else - status =3D __iomap_write_begin(inode, pos, len, flags, page, - srcmap); + status =3D __iomap_write_begin(inode, pos, len, flags, + thp_head(page), srcmap); =20 if (status < 0) goto out_unlock; @@ -675,6 +675,7 @@ iomap_set_page_dirty(struct page *page) struct address_space *mapping =3D page_mapping(page); int newly_dirty; =20 + VM_BUG_ON_PGFLAGS(PageTail(page), page); if (unlikely(!mapping)) return !TestSetPageDirty(page); =20 @@ -697,7 +698,9 @@ EXPORT_SYMBOL_GPL(iomap_set_page_dirty); static size_t __iomap_write_end(struct inode *inode, loff_t pos, size_t = len, size_t copied, struct page *page) { - flush_dcache_page(page); + size_t offset =3D offset_in_thp(page, pos); + + flush_dcache_page(page + offset / PAGE_SIZE); =20 /* * The blocks that were entirely written will now be uptodate, so we @@ -712,7 +715,7 @@ static size_t __iomap_write_end(struct inode *inode, = loff_t pos, size_t len, */ if (unlikely(copied < len && !PageUptodate(page))) return 0; - iomap_set_range_uptodate(page, offset_in_page(pos), len); + iomap_set_range_uptodate(page, offset, len); iomap_set_page_dirty(page); return copied; } @@ -749,7 +752,8 @@ static size_t iomap_write_end(struct inode *inode, lo= ff_t pos, size_t len, ret =3D block_write_end(NULL, inode->i_mapping, pos, len, copied, page, NULL); } else { - ret =3D __iomap_write_end(inode, pos, len, copied, page); + ret =3D __iomap_write_end(inode, pos, len, copied, + thp_head(page)); } =20 /* @@ -788,6 +792,10 @@ iomap_write_actor(struct inode *inode, loff_t pos, l= off_t length, void *data, unsigned long bytes; /* Bytes to write to page */ size_t copied; /* Bytes copied from user */ =20 + /* + * XXX: We don't know what size page we'll find in the + * page cache, so only copy up to a regular page boundary. + */ offset =3D offset_in_page(pos); bytes =3D min_t(unsigned long, PAGE_SIZE - offset, iov_iter_count(i)); @@ -818,7 +826,7 @@ iomap_write_actor(struct inode *inode, loff_t pos, lo= ff_t length, void *data, offset =3D offset_in_thp(page, pos); =20 if (mapping_writably_mapped(inode->i_mapping)) - flush_dcache_page(page); + flush_dcache_page(page + offset / PAGE_SIZE); =20 copied =3D iov_iter_copy_from_user_atomic(page, i, offset, bytes); =20 @@ -1110,7 +1118,7 @@ iomap_finish_ioend(struct iomap_ioend *ioend, int e= rror) next =3D bio->bi_private; =20 /* walk each page on bio, ending page IO on them */ - bio_for_each_segment_all(bv, bio, iter_all) + bio_for_each_thp_segment_all(bv, bio, iter_all) iomap_finish_page_writeback(inode, bv->bv_page, error, bv->bv_len); bio_put(bio); @@ -1317,7 +1325,7 @@ iomap_add_to_ioend(struct inode *inode, loff_t offs= et, struct page *page, { sector_t sector =3D iomap_sector(&wpc->iomap, offset); unsigned len =3D i_blocksize(inode); - unsigned poff =3D offset & (PAGE_SIZE - 1); + unsigned poff =3D offset_in_thp(page, offset); bool merged, same_page =3D false; =20 if (!wpc->ioend || !iomap_can_add_to_ioend(wpc, offset, sector)) { @@ -1367,8 +1375,9 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc= , struct iomap_page *iop =3D iomap_page_create(inode, page); struct iomap_ioend *ioend, *next; unsigned len =3D i_blocksize(inode); - u64 file_offset; /* file offset of page */ + loff_t pos; int error =3D 0, count =3D 0, i; + int nr_blocks =3D i_blocks_per_page(inode, page); LIST_HEAD(submit_list); =20 WARN_ON_ONCE(iop && atomic_read(&iop->write_count) !=3D 0); @@ -1378,20 +1387,20 @@ iomap_writepage_map(struct iomap_writepage_ctx *w= pc, * end of the current map or find the current map invalid, grab a new * one. */ - for (i =3D 0, file_offset =3D page_offset(page); - i < (PAGE_SIZE >> inode->i_blkbits) && file_offset < end_offset; - i++, file_offset +=3D len) { + for (i =3D 0, pos =3D page_offset(page); + i < nr_blocks && pos < end_offset; + i++, pos +=3D len) { if (iop && !test_bit(i, iop->uptodate)) continue; =20 - error =3D wpc->ops->map_blocks(wpc, inode, file_offset); + error =3D wpc->ops->map_blocks(wpc, inode, pos); if (error) break; if (WARN_ON_ONCE(wpc->iomap.type =3D=3D IOMAP_INLINE)) continue; if (wpc->iomap.type =3D=3D IOMAP_HOLE) continue; - iomap_add_to_ioend(inode, file_offset, page, iop, wpc, wbc, + iomap_add_to_ioend(inode, pos, page, iop, wpc, wbc, &submit_list); count++; } @@ -1473,11 +1482,11 @@ iomap_do_writepage(struct page *page, struct writ= eback_control *wbc, void *data) { struct iomap_writepage_ctx *wpc =3D data; struct inode *inode =3D page->mapping->host; - pgoff_t end_index; u64 end_offset; loff_t offset; =20 - trace_iomap_writepage(inode, page_offset(page), PAGE_SIZE); + VM_BUG_ON_PGFLAGS(PageTail(page), page); + trace_iomap_writepage(inode, page_offset(page), thp_size(page)); =20 /* * Refuse to write the page out if we are called from reclaim context. @@ -1514,10 +1523,8 @@ iomap_do_writepage(struct page *page, struct write= back_control *wbc, void *data) * ---------------------------------^------------------| */ offset =3D i_size_read(inode); - end_index =3D offset >> PAGE_SHIFT; - if (page->index < end_index) - end_offset =3D (loff_t)(page->index + 1) << PAGE_SHIFT; - else { + end_offset =3D page_offset(page) + thp_size(page); + if (end_offset > offset) { /* * Check whether the page to write out is beyond or straddles * i_size or not. @@ -1529,7 +1536,8 @@ iomap_do_writepage(struct page *page, struct writeb= ack_control *wbc, void *data) * | | Straddles | * ---------------------------------^-----------|--------| */ - unsigned offset_into_page =3D offset & (PAGE_SIZE - 1); + unsigned offset_into_page =3D offset_in_thp(page, offset); + pgoff_t end_index =3D offset >> PAGE_SHIFT; =20 /* * Skip the page if it is fully outside i_size, e.g. due to a @@ -1560,7 +1568,7 @@ iomap_do_writepage(struct page *page, struct writeb= ack_control *wbc, void *data) * memory is zeroed when mapped, and writes to that region are * not written out to the file." */ - zero_user_segment(page, offset_into_page, PAGE_SIZE); + zero_user_segment(page, offset_into_page, thp_size(page)); =20 /* Adjust the end_offset to the end of file */ end_offset =3D offset; --=20 2.28.0