From patchwork Wed Oct 23 13:37:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13847118 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 476AC1ABEA9 for ; Wed, 23 Oct 2024 13:38:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729690686; cv=none; b=Nk4IjHrmn2MWbZcMnB1a9a8PkcZC3ouZK6wtLY6LOyV/8ekpAsx2rggUzBQSvBF+5AIwZj0tzYjbZ3Y6Y0yQq5XnNFtqp3FDVI15vxk9F6ZnY+GznrgOxowH6VYOop5zosghbmKPSC75+Dgxzgad2ZCPmg1UNS3adWtiN06t1xI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729690686; c=relaxed/simple; bh=oAp74vRkIU2XQNg4+dscI4vW6LqrY2RbbFO/uJ3+gbw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=esXyynXDHToGgsYtT9NEgOKAgkqLKoQx4kTfbjHXM/AuKvMIOVvbG0NXpi2JVvWiOEE+Fq1lB22x5qKXJwGW5gemy2WVWpXWugSEle5jDwFZAIuMA9RE5/TKBhru7ButOBRdDNNsVfD5RLt7i/acLW5mpLnVG+7qdH3wYeauaB0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=qKu4bm1K; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="qKu4bm1K" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=mq2hJxX1HWeG3WjvESgrctXx7aBUC0OIOmwLfPHGXws=; b=qKu4bm1KaY0+3uhNslVzDZLPJb cdv/dIcekwfdnlW8bCjksdKSMD92RtdBXA+TDyxN8Vr9q5IrgPrno8Soc7KyMXDN/Hmf+EVZEOAe6 JrzL8qjPjh5XXFO3HPzXckKMg/pXy+9XEWQH+zn13h9FRq0yReBQPJwBLnSFGlw7fyYpXe/4kb06z QbVgxdZHvnmb3tjEKXnFdrbwgpxRrFIh/+mUgmbEGZxnUwtHq2MbAaWRO1Y9a05um7tds9mpd6xPp T14H3e2ISNnYMIf4THWbVG9W28p9p5VtkISIwIuXW+Jn/MkWllekEf9cmOiXHnNJGQby6H4Pll7IT vHP0ZL+Q==; Received: from 2a02-8389-2341-5b80-8c6c-e123-fc47-94a5.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:8c6c:e123:fc47:94a5] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1t3bYq-0000000EZWT-0n2C; Wed, 23 Oct 2024 13:38:04 +0000 From: Christoph Hellwig To: Carlos Maiolino Cc: "Darrick J. Wong" , linux-xfs@vger.kernel.org Subject: [PATCH 2/2] xfs: streamline xfs_filestream_pick_ag Date: Wed, 23 Oct 2024 15:37:23 +0200 Message-ID: <20241023133755.524345-3-hch@lst.de> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241023133755.524345-1-hch@lst.de> References: <20241023133755.524345-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Directly return the error from xfs_bmap_longest_free_extent instead of breaking from the loop and handling it there, and use a done label to directly jump to the exist when we found a suitable perag structure to reduce the indentation level and pag/max_pag check complexity in the tail of the function. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/xfs/xfs_filestream.c | 96 ++++++++++++++++++++--------------------- 1 file changed, 46 insertions(+), 50 deletions(-) diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c index 88bd23ce74cd..290ba8887d29 100644 --- a/fs/xfs/xfs_filestream.c +++ b/fs/xfs/xfs_filestream.c @@ -67,22 +67,28 @@ xfs_filestream_pick_ag( xfs_extlen_t minfree, maxfree = 0; xfs_agnumber_t agno; bool first_pass = true; - int err; /* 2% of an AG's blocks must be free for it to be chosen. */ minfree = mp->m_sb.sb_agblocks / 50; restart: for_each_perag_wrap(mp, start_agno, agno, pag) { + int err; + trace_xfs_filestream_scan(pag, pino); + *longest = 0; err = xfs_bmap_longest_free_extent(pag, NULL, longest); if (err) { - if (err != -EAGAIN) - break; - /* Couldn't lock the AGF, skip this AG. */ - err = 0; - continue; + if (err == -EAGAIN) { + /* Couldn't lock the AGF, skip this AG. */ + err = 0; + continue; + } + xfs_perag_rele(pag); + if (max_pag) + xfs_perag_rele(max_pag); + return err; } /* Keep track of the AG with the most free blocks. */ @@ -107,7 +113,9 @@ xfs_filestream_pick_ag( !(flags & XFS_PICK_USERDATA) || (flags & XFS_PICK_LOWSPACE))) { /* Break out, retaining the reference on the AG. */ - break; + if (max_pag) + xfs_perag_rele(max_pag); + goto done; } } @@ -115,56 +123,44 @@ xfs_filestream_pick_ag( atomic_dec(&pag->pagf_fstrms); } - if (err) { - xfs_perag_rele(pag); - if (max_pag) - xfs_perag_rele(max_pag); - return err; + /* + * Allow a second pass to give xfs_bmap_longest_free_extent() another + * attempt at locking AGFs that it might have skipped over before we + * fail. + */ + if (first_pass) { + first_pass = false; + goto restart; } - if (!pag) { - /* - * Allow a second pass to give xfs_bmap_longest_free_extent() - * another attempt at locking AGFs that it might have skipped - * over before we fail. - */ - if (first_pass) { - first_pass = false; - goto restart; - } - - /* - * We must be low on data space, so run a final lowspace - * optimised selection pass if we haven't already. - */ - if (!(flags & XFS_PICK_LOWSPACE)) { - flags |= XFS_PICK_LOWSPACE; - goto restart; - } - - /* - * No unassociated AGs are available, so select the AG with the - * most free space, regardless of whether it's already in use by - * another filestream. It none suit, just use whatever AG we can - * grab. - */ - if (!max_pag) { - for_each_perag_wrap(args->mp, 0, start_agno, pag) { - max_pag = pag; - break; - } + /* + * We must be low on data space, so run a final lowspace optimised + * selection pass if we haven't already. + */ + if (!(flags & XFS_PICK_LOWSPACE)) { + flags |= XFS_PICK_LOWSPACE; + goto restart; + } - /* Bail if there are no AGs at all to select from. */ - if (!max_pag) - return -ENOSPC; + /* + * No unassociated AGs are available, so select the AG with the most + * free space, regardless of whether it's already in use by another + * filestream. It none suit, just use whatever AG we can grab. + */ + if (!max_pag) { + for_each_perag_wrap(args->mp, 0, start_agno, pag) { + max_pag = pag; + break; } - pag = max_pag; - atomic_inc(&pag->pagf_fstrms); - } else if (max_pag) { - xfs_perag_rele(max_pag); + /* Bail if there are no AGs at all to select from. */ + if (!max_pag) + return -ENOSPC; } + pag = max_pag; + atomic_inc(&pag->pagf_fstrms); +done: trace_xfs_filestream_pick(pag, pino); args->pag = pag; return 0;