From patchwork Thu May 7 13:03:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiping Zhang X-Patchwork-Id: 11533581 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2814A81 for ; Thu, 7 May 2020 13:03:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 106BF208D6 for ; Thu, 7 May 2020 13:03:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725857AbgEGNDs (ORCPT ); Thu, 7 May 2020 09:03:48 -0400 Received: from mx2.didiglobal.com ([111.202.154.82]:6274 "HELO bsf01.didichuxing.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1726267AbgEGNDs (ORCPT ); Thu, 7 May 2020 09:03:48 -0400 X-ASG-Debug-ID: 1588856620-0e408819ee78880001-Cu09wu Received: from mail.didiglobal.com (localhost [172.20.36.236]) by bsf01.didichuxing.com with ESMTP id 6Vp6GOhI5XSgY67h; Thu, 07 May 2020 21:03:40 +0800 (CST) X-Barracuda-Envelope-From: zhangweiping@didiglobal.com Received: from 192.168.3.9 (172.22.50.20) by BJSGEXMBX03.didichuxing.com (172.20.15.133) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 7 May 2020 21:03:40 +0800 Date: Thu, 7 May 2020 21:03:39 +0800 From: Weiping Zhang To: , , , CC: Subject: [PATCH v6 1/5] block: free both rq_map and request Message-ID: X-ASG-Orig-Subj: [PATCH v6 1/5] block: free both rq_map and request Mail-Followup-To: axboe@kernel.dk, tom.leiming@gmail.com, bvanassche@acm.org, hch@infradead.org, linux-block@vger.kernel.org References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [172.22.50.20] X-ClientProxiedBy: BJEXCAS02.didichuxing.com (172.20.36.211) To BJSGEXMBX03.didichuxing.com (172.20.15.133) X-Barracuda-Connect: localhost[172.20.36.236] X-Barracuda-Start-Time: 1588856620 X-Barracuda-URL: https://bsf01.didichuxing.com:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at didichuxing.com X-Barracuda-Scan-Msg-Size: 1257 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Spam-Score: 1.08 X-Barracuda-Spam-Status: No, SCORE=1.08 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=1000.0 tests=BSF_SC0_MV0249, MARKETING_SUBJECT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.81679 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.60 MARKETING_SUBJECT Subject contains popular marketing words 2.50 BSF_SC0_MV0249 Custom rule MV0249 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Allocation: __blk_mq_alloc_rq_map blk_mq_alloc_rq_map blk_mq_alloc_rq_map tags = blk_mq_init_tags : kzalloc_node: tags->rqs = kcalloc_node tags->static_rqs = kcalloc_node blk_mq_alloc_rqs p = alloc_pages_node tags->static_rqs[i] = p + offset; Free: blk_mq_free_rq_map kfree(tags->rqs); kfree(tags->static_rqs); blk_mq_free_tags kfree(tags); The page allocated in blk_mq_alloc_rqs cannot be released, so we should use blk_mq_free_map_and_requests here. blk_mq_free_map_and_requests blk_mq_free_rqs __free_pages : cleanup for blk_mq_alloc_rqs blk_mq_free_rq_map : cleanup for blk_mq_alloc_rq_map Reviewed-by: Ming Lei Reviewed-by: Christoph Hellwig Signed-off-by: Weiping Zhang Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index a7785df2c944..f789b3e1b3ab 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2995,7 +2995,7 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) out_unwind: while (--i >= 0) - blk_mq_free_rq_map(set->tags[i]); + blk_mq_free_map_and_requests(set, i); return -ENOMEM; } From patchwork Thu May 7 13:03:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiping Zhang X-Patchwork-Id: 11533583 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 89EC4139A for ; Thu, 7 May 2020 13:04:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71CCF208DB for ; Thu, 7 May 2020 13:04:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726320AbgEGNEH (ORCPT ); Thu, 7 May 2020 09:04:07 -0400 Received: from mx2.didichuxing.com ([36.110.17.22]:32294 "HELO bsf02.didichuxing.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1726267AbgEGNEG (ORCPT ); Thu, 7 May 2020 09:04:06 -0400 X-ASG-Debug-ID: 1588856637-0e4108595c94cae0001-Cu09wu Received: from mail.didiglobal.com (localhost [172.20.36.203]) by bsf02.didichuxing.com with ESMTP id 3jufziol7RNFK9HG; Thu, 07 May 2020 21:03:57 +0800 (CST) X-Barracuda-Envelope-From: zhangweiping@didiglobal.com Received: from 192.168.3.9 (172.22.50.20) by BJSGEXMBX03.didichuxing.com (172.20.15.133) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 7 May 2020 21:03:57 +0800 Date: Thu, 7 May 2020 21:03:56 +0800 From: Weiping Zhang To: , , , CC: Subject: [PATCH v6 2/5] block: save previous hardware queue count before udpate Message-ID: X-ASG-Orig-Subj: [PATCH v6 2/5] block: save previous hardware queue count before udpate Mail-Followup-To: axboe@kernel.dk, tom.leiming@gmail.com, bvanassche@acm.org, hch@infradead.org, linux-block@vger.kernel.org References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [172.22.50.20] X-ClientProxiedBy: BJEXCAS02.didichuxing.com (172.20.36.211) To BJSGEXMBX03.didichuxing.com (172.20.15.133) X-Barracuda-Connect: localhost[172.20.36.203] X-Barracuda-Start-Time: 1588856637 X-Barracuda-URL: https://bsf02.didichuxing.com:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at didichuxing.com X-Barracuda-Scan-Msg-Size: 955 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0208 X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=1000.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.81681 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org blk_mq_realloc_tag_set_tags will update set->nr_hw_queues, so save old set->nr_hw_queues before call this function. Reviewed-by: Bart Van Assche Reviewed-by: Ming Lei Reviewed-by: Christoph Hellwig Signed-off-by: Weiping Zhang Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index f789b3e1b3ab..a79afbe60ca6 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3347,11 +3347,11 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, blk_mq_sysfs_unregister(q); } + prev_nr_hw_queues = set->nr_hw_queues; if (blk_mq_realloc_tag_set_tags(set, set->nr_hw_queues, nr_hw_queues) < 0) goto reregister; - prev_nr_hw_queues = set->nr_hw_queues; set->nr_hw_queues = nr_hw_queues; blk_mq_update_queue_map(set); fallback: From patchwork Thu May 7 13:04:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiping Zhang X-Patchwork-Id: 11533585 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2C086139A for ; Thu, 7 May 2020 13:04:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A512208DB for ; Thu, 7 May 2020 13:04:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726267AbgEGNES (ORCPT ); Thu, 7 May 2020 09:04:18 -0400 Received: from mx2.didiglobal.com ([111.202.154.82]:5513 "HELO bsf01.didichuxing.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1725914AbgEGNES (ORCPT ); Thu, 7 May 2020 09:04:18 -0400 X-ASG-Debug-ID: 1588856649-0e408819ec788e0001-Cu09wu Received: from mail.didiglobal.com (localhost [172.20.36.143]) by bsf01.didichuxing.com with ESMTP id zRyD5dt11JfbBet7; Thu, 07 May 2020 21:04:09 +0800 (CST) X-Barracuda-Envelope-From: zhangweiping@didiglobal.com Received: from 192.168.3.9 (172.22.50.20) by BJSGEXMBX03.didichuxing.com (172.20.15.133) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 7 May 2020 21:04:09 +0800 Date: Thu, 7 May 2020 21:04:08 +0800 From: Weiping Zhang To: , , , CC: Subject: [PATCH v6 3/5] block: alloc map and request for new hardware queue Message-ID: X-ASG-Orig-Subj: [PATCH v6 3/5] block: alloc map and request for new hardware queue Mail-Followup-To: axboe@kernel.dk, tom.leiming@gmail.com, bvanassche@acm.org, hch@infradead.org, linux-block@vger.kernel.org References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [172.22.50.20] X-ClientProxiedBy: BJEXCAS02.didichuxing.com (172.20.36.211) To BJSGEXMBX03.didichuxing.com (172.20.15.133) X-Barracuda-Connect: localhost[172.20.36.143] X-Barracuda-Start-Time: 1588856649 X-Barracuda-URL: https://bsf01.didichuxing.com:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at didichuxing.com X-Barracuda-Scan-Msg-Size: 8678 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0116 1.0000 -1.9452 X-Barracuda-Spam-Score: -1.95 X-Barracuda-Spam-Status: No, SCORE=-1.95 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=1000.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.81679 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Ming Lei Alloc new map and request for new hardware queue when increse hardware queue count. Before this patch, it will show a warning for each new hardware queue, but it's not enough, these hctx have no maps and reqeust, when a bio was mapped to these hardware queue, it will trigger kernel panic when get request from these hctx. Test environment: * A NVMe disk supports 128 io queues * 96 cpus in system A corner case can always trigger this panic, there are 96 io queues allocated for HCTX_TYPE_DEFAULT type, the corresponding kernel log: nvme nvme0: 96/0/0 default/read/poll queues. Now we set nvme write queues to 96, then nvme will alloc others(32) queues for read, but blk_mq_update_nr_hw_queues does not alloc map and request for these new added io queues. So when process read nvme disk, it will trigger kernel panic when get request from these hardware context. Reproduce script: nr=$(expr `cat /sys/block/nvme0n1/device/queue_count` - 1) echo $nr > /sys/module/nvme/parameters/write_queues echo 1 > /sys/block/nvme0n1/device/reset_controller dd if=/dev/nvme0n1 of=/dev/null bs=4K count=1 [ 8040.805626] ------------[ cut here ]------------ [ 8040.805627] WARNING: CPU: 82 PID: 12921 at block/blk-mq.c:2578 blk_mq_map_swqueue+0x2b6/0x2c0 [ 8040.805627] Modules linked in: nvme nvme_core nf_conntrack_netlink xt_addrtype br_netfilter overlay xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nft_counter nf_nat_tftp nf_conntrack_tftp nft_masq nf_tables_set nft_fib_inet nft_f ib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack tun bridge nf_defrag_ipv6 nf_defrag_ipv4 stp llc ip6_tables ip_tables nft_compat rfkill ip_set nf_tables nfne tlink sunrpc intel_rapl_msr intel_rapl_common skx_edac nfit libnvdimm x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass ipmi_ssif crct10dif_pclmul crc32_pclmul iTCO_wdt iTCO_vendor_support ghash_clmulni_intel intel_ cstate intel_uncore raid0 joydev intel_rapl_perf ipmi_si pcspkr mei_me ioatdma sg ipmi_devintf mei i2c_i801 dca lpc_ich ipmi_msghandler acpi_power_meter acpi_pad xfs libcrc32c sd_mod ast i2c_algo_bit drm_vram_helper drm_ttm_helper ttm d rm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops [ 8040.805637] ahci drm i40e libahci crc32c_intel libata t10_pi wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: nvme_core] [ 8040.805640] CPU: 82 PID: 12921 Comm: kworker/u194:2 Kdump: loaded Tainted: G W 5.6.0-rc5.78317c+ #2 [ 8040.805640] Hardware name: Inspur SA5212M5/YZMB-00882-104, BIOS 4.0.9 08/27/2019 [ 8040.805641] Workqueue: nvme-reset-wq nvme_reset_work [nvme] [ 8040.805642] RIP: 0010:blk_mq_map_swqueue+0x2b6/0x2c0 [ 8040.805643] Code: 00 00 00 00 00 41 83 c5 01 44 39 6d 50 77 b8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 8b bb 98 00 00 00 89 d6 e8 8c 81 03 00 eb 83 <0f> 0b e9 52 ff ff ff 0f 1f 00 0f 1f 44 00 00 41 57 48 89 f1 41 56 [ 8040.805643] RSP: 0018:ffffba590d2e7d48 EFLAGS: 00010246 [ 8040.805643] RAX: 0000000000000000 RBX: ffff9f013e1ba800 RCX: 000000000000003d [ 8040.805644] RDX: ffff9f00ffff6000 RSI: 0000000000000003 RDI: ffff9ed200246d90 [ 8040.805644] RBP: ffff9f00f6a79860 R08: 0000000000000000 R09: 000000000000003d [ 8040.805645] R10: 0000000000000001 R11: ffff9f0138c3d000 R12: ffff9f00fb3a9008 [ 8040.805645] R13: 000000000000007f R14: ffffffff96822660 R15: 000000000000005f [ 8040.805645] FS: 0000000000000000(0000) GS:ffff9f013fa80000(0000) knlGS:0000000000000000 [ 8040.805646] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8040.805646] CR2: 00007f7f397fa6f8 CR3: 0000003d8240a002 CR4: 00000000007606e0 [ 8040.805647] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 8040.805647] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 8040.805647] PKRU: 55555554 [ 8040.805647] Call Trace: [ 8040.805649] blk_mq_update_nr_hw_queues+0x31b/0x390 [ 8040.805650] nvme_reset_work+0xb4b/0xeab [nvme] [ 8040.805651] process_one_work+0x1a7/0x370 [ 8040.805652] worker_thread+0x1c9/0x380 [ 8040.805653] ? max_active_store+0x80/0x80 [ 8040.805655] kthread+0x112/0x130 [ 8040.805656] ? __kthread_parkme+0x70/0x70 [ 8040.805657] ret_from_fork+0x35/0x40 [ 8040.805658] ---[ end trace b5f13b1e73ccb5d3 ]--- [ 8229.365135] BUG: kernel NULL pointer dereference, address: 0000000000000004 [ 8229.365165] #PF: supervisor read access in kernel mode [ 8229.365178] #PF: error_code(0x0000) - not-present page [ 8229.365191] PGD 0 P4D 0 [ 8229.365201] Oops: 0000 [#1] SMP PTI [ 8229.365212] CPU: 77 PID: 13024 Comm: dd Kdump: loaded Tainted: G W 5.6.0-rc5.78317c+ #2 [ 8229.365232] Hardware name: Inspur SA5212M5/YZMB-00882-104, BIOS 4.0.9 08/27/2019 [ 8229.365253] RIP: 0010:blk_mq_get_tag+0x227/0x250 [ 8229.365265] Code: 44 24 04 44 01 e0 48 8b 74 24 38 65 48 33 34 25 28 00 00 00 75 33 48 83 c4 40 5b 5d 41 5c 41 5d 41 5e c3 48 8d 68 10 4c 89 ef <44> 8b 60 04 48 89 ee e8 dd f9 ff ff 83 f8 ff 75 c8 e9 67 fe ff ff [ 8229.365304] RSP: 0018:ffffba590e977970 EFLAGS: 00010246 [ 8229.365317] RAX: 0000000000000000 RBX: ffff9f00f6a79860 RCX: ffffba590e977998 [ 8229.365333] RDX: 0000000000000000 RSI: ffff9f012039b140 RDI: ffffba590e977a38 [ 8229.365349] RBP: 0000000000000010 R08: ffffda58ff94e190 R09: ffffda58ff94e198 [ 8229.365365] R10: 0000000000000011 R11: ffff9f00f6a79860 R12: 0000000000000000 [ 8229.365381] R13: ffffba590e977a38 R14: ffff9f012039b140 R15: 0000000000000001 [ 8229.365397] FS: 00007f481c230580(0000) GS:ffff9f013f940000(0000) knlGS:0000000000000000 [ 8229.365415] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8229.365428] CR2: 0000000000000004 CR3: 0000005f35e26004 CR4: 00000000007606e0 [ 8229.365444] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 8229.365460] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 8229.365476] PKRU: 55555554 [ 8229.365484] Call Trace: [ 8229.365498] ? finish_wait+0x80/0x80 [ 8229.365512] blk_mq_get_request+0xcb/0x3f0 [ 8229.365525] blk_mq_make_request+0x143/0x5d0 [ 8229.365538] generic_make_request+0xcf/0x310 [ 8229.365553] ? scan_shadow_nodes+0x30/0x30 [ 8229.365564] submit_bio+0x3c/0x150 [ 8229.365576] mpage_readpages+0x163/0x1a0 [ 8229.365588] ? blkdev_direct_IO+0x490/0x490 [ 8229.365601] read_pages+0x6b/0x190 [ 8229.365612] __do_page_cache_readahead+0x1c1/0x1e0 [ 8229.365626] ondemand_readahead+0x182/0x2f0 [ 8229.365639] generic_file_buffered_read+0x590/0xab0 [ 8229.365655] new_sync_read+0x12a/0x1c0 [ 8229.365666] vfs_read+0x8a/0x140 [ 8229.365676] ksys_read+0x59/0xd0 [ 8229.365688] do_syscall_64+0x55/0x1d0 [ 8229.365700] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Tested-by: Weiping Zhang Reviewed-by: Christoph Hellwig Signed-off-by: Ming Lei Signed-off-by: Weiping Zhang Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index a79afbe60ca6..c6ba94cba17d 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2521,18 +2521,6 @@ static void blk_mq_map_swqueue(struct request_queue *q) * If the cpu isn't present, the cpu is mapped to first hctx. */ for_each_possible_cpu(i) { - hctx_idx = set->map[HCTX_TYPE_DEFAULT].mq_map[i]; - /* unmapped hw queue can be remapped after CPU topo changed */ - if (!set->tags[hctx_idx] && - !__blk_mq_alloc_rq_map(set, hctx_idx)) { - /* - * If tags initialization fail for some hctx, - * that hctx won't be brought online. In this - * case, remap the current ctx to hctx[0] which - * is guaranteed to always have tags allocated - */ - set->map[HCTX_TYPE_DEFAULT].mq_map[i] = 0; - } ctx = per_cpu_ptr(q->queue_ctx, i); for (j = 0; j < set->nr_maps; j++) { @@ -2541,6 +2529,18 @@ static void blk_mq_map_swqueue(struct request_queue *q) HCTX_TYPE_DEFAULT, i); continue; } + hctx_idx = set->map[j].mq_map[i]; + /* unmapped hw queue can be remapped after CPU topo changed */ + if (!set->tags[hctx_idx] && + !__blk_mq_alloc_rq_map(set, hctx_idx)) { + /* + * If tags initialization fail for some hctx, + * that hctx won't be brought online. In this + * case, remap the current ctx to hctx[0] which + * is guaranteed to always have tags allocated + */ + set->map[j].mq_map[i] = 0; + } hctx = blk_mq_map_queue_type(q, j, i); ctx->hctxs[j] = hctx; From patchwork Thu May 7 13:04:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiping Zhang X-Patchwork-Id: 11533587 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8E9F081 for ; Thu, 7 May 2020 13:04:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 77366208D6 for ; Thu, 7 May 2020 13:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725948AbgEGNEa (ORCPT ); Thu, 7 May 2020 09:04:30 -0400 Received: from mx1.didichuxing.com ([111.202.154.82]:13771 "HELO bsf02.didichuxing.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1725914AbgEGNE3 (ORCPT ); Thu, 7 May 2020 09:04:29 -0400 X-ASG-Debug-ID: 1588856663-0e4108595b94cc00001-Cu09wu Received: from mail.didiglobal.com (localhost [172.20.36.244]) by bsf02.didichuxing.com with ESMTP id zADTRRE4jQoVQhHI; Thu, 07 May 2020 21:04:23 +0800 (CST) X-Barracuda-Envelope-From: zhangweiping@didiglobal.com Received: from 192.168.3.9 (172.22.50.20) by BJSGEXMBX03.didichuxing.com (172.20.15.133) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 7 May 2020 21:04:23 +0800 Date: Thu, 7 May 2020 21:04:22 +0800 From: Weiping Zhang To: , , , CC: Subject: [PATCH v6 4/5] block: rename __blk_mq_alloc_rq_map Message-ID: <61e07b3980c19287e4a1d12b8e2a3b26e262ea0b.1588856361.git.zhangweiping@didiglobal.com> X-ASG-Orig-Subj: [PATCH v6 4/5] block: rename __blk_mq_alloc_rq_map Mail-Followup-To: axboe@kernel.dk, tom.leiming@gmail.com, bvanassche@acm.org, hch@infradead.org, linux-block@vger.kernel.org References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [172.22.50.20] X-ClientProxiedBy: BJEXCAS02.didichuxing.com (172.20.36.211) To BJSGEXMBX03.didichuxing.com (172.20.15.133) X-Barracuda-Connect: localhost[172.20.36.244] X-Barracuda-Start-Time: 1588856663 X-Barracuda-URL: https://bsf02.didichuxing.com:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at didichuxing.com X-Barracuda-Scan-Msg-Size: 1486 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=1000.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.81681 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org rename __blk_mq_alloc_rq_map to __blk_mq_alloc_map_and_request, actually it alloc both map and request, make function name align with function. Reviewed-by: Ming Lei Signed-off-by: Weiping Zhang Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index c6ba94cba17d..0a4f7fdd2248 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2473,7 +2473,8 @@ static void blk_mq_init_cpu_queues(struct request_queue *q, } } -static bool __blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, int hctx_idx) +static bool __blk_mq_alloc_map_and_request(struct blk_mq_tag_set *set, + int hctx_idx) { int ret = 0; @@ -2532,7 +2533,7 @@ static void blk_mq_map_swqueue(struct request_queue *q) hctx_idx = set->map[j].mq_map[i]; /* unmapped hw queue can be remapped after CPU topo changed */ if (!set->tags[hctx_idx] && - !__blk_mq_alloc_rq_map(set, hctx_idx)) { + !__blk_mq_alloc_map_and_request(set, hctx_idx)) { /* * If tags initialization fail for some hctx, * that hctx won't be brought online. In this @@ -2988,7 +2989,7 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) int i; for (i = 0; i < set->nr_hw_queues; i++) - if (!__blk_mq_alloc_rq_map(set, i)) + if (!__blk_mq_alloc_map_and_request(set, i)) goto out_unwind; return 0; From patchwork Thu May 7 13:04:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiping Zhang X-Patchwork-Id: 11533589 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 694F914B4 for ; Thu, 7 May 2020 13:04:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 51C72208DB for ; Thu, 7 May 2020 13:04:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726638AbgEGNEt (ORCPT ); Thu, 7 May 2020 09:04:49 -0400 Received: from mx2.didiglobal.com ([111.202.154.82]:22210 "HELO bsf01.didichuxing.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1725914AbgEGNEt (ORCPT ); Thu, 7 May 2020 09:04:49 -0400 X-ASG-Debug-ID: 1588856683-0e408819ec78960001-Cu09wu Received: from mail.didiglobal.com (localhost [172.20.36.175]) by bsf01.didichuxing.com with ESMTP id IaBfkJSaE9POZBtk; Thu, 07 May 2020 21:04:43 +0800 (CST) X-Barracuda-Envelope-From: zhangweiping@didiglobal.com Received: from 192.168.3.9 (172.22.50.20) by BJSGEXMBX03.didichuxing.com (172.20.15.133) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 7 May 2020 21:04:43 +0800 Date: Thu, 7 May 2020 21:04:42 +0800 From: Weiping Zhang To: , , , CC: Subject: [PATCH v6 5/5] block: rename blk_mq_alloc_rq_maps Message-ID: X-ASG-Orig-Subj: [PATCH v6 5/5] block: rename blk_mq_alloc_rq_maps Mail-Followup-To: axboe@kernel.dk, tom.leiming@gmail.com, bvanassche@acm.org, hch@infradead.org, linux-block@vger.kernel.org References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [172.22.50.20] X-ClientProxiedBy: BJEXCAS02.didichuxing.com (172.20.36.211) To BJSGEXMBX03.didichuxing.com (172.20.15.133) X-Barracuda-Connect: localhost[172.20.36.175] X-Barracuda-Start-Time: 1588856683 X-Barracuda-URL: https://bsf01.didichuxing.com:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at didichuxing.com X-Barracuda-Scan-Msg-Size: 1157 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=1000.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.81679 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org rename blk_mq_alloc_rq_maps to blk_mq_alloc_map_and_requests, this function allocs both map and request, make function name align with funtion. Reviewed-by: Ming Lei Reviewed-by: Christoph Hellwig Signed-off-by: Weiping Zhang Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 0a4f7fdd2248..649a8abdd742 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3006,7 +3006,7 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) * may reduce the depth asked for, if memory is tight. set->queue_depth * will be updated to reflect the allocated depth. */ -static int blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) +static int blk_mq_alloc_map_and_requests(struct blk_mq_tag_set *set) { unsigned int depth; int err; @@ -3166,7 +3166,7 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set) if (ret) goto out_free_mq_map; - ret = blk_mq_alloc_rq_maps(set); + ret = blk_mq_alloc_map_and_requests(set); if (ret) goto out_free_mq_map;