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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 99C29C10F0C for ; Thu, 4 Apr 2019 16:44:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68725206DF for ; Thu, 4 Apr 2019 16:44:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LQWIGFVO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729468AbfDDQos (ORCPT ); Thu, 4 Apr 2019 12:44:48 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:40702 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727353AbfDDQos (ORCPT ); Thu, 4 Apr 2019 12:44:48 -0400 Received: by mail-pl1-f194.google.com with SMTP id b3so1436438plr.7; Thu, 04 Apr 2019 09:44:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Xy+ReW4WdLg6r3y8MidIxbAapRZPzkiZdvdN2N1NwHE=; b=LQWIGFVO8E5mI4/pB2iT2o/XMJow15/aaRgvT4gmragYFUbh2dZaZYUQPRUxsYL4VG bg8qxJ9bLM2138IvXNwujUVHpFQP1nuoB8dSQU2YvPH+KANZdslxHlIY7PEFuwn1NWKC UwP4wcQZoT0vsldKl4EJh1scM/nLuVssLzHnnD3nuhdra9KXmWvmh88Fhh8C9U4OFasS 9Fwq1ip+ACOW93YiPXQsR/oziYYiYHpuAKWTWmmFmmrrEGu+2Tb2vwSZPfmNI/eWzA5D gT2g4xqETl99tSK9TMrd/ixA7fuo82WwgemMLh7qmDJfbPJTpcQdW+wELfxwHFulGEsG InqA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Xy+ReW4WdLg6r3y8MidIxbAapRZPzkiZdvdN2N1NwHE=; b=p/COCknQIKi2efB4mWTtwYSAF4a/Ft8CBrVt6N/SYk/JjqMD4xAEabYDt1VvGi/3/q G+QcT+/u212kZZ5p09HzR5EkQXU9VIRrd+ek8U2Iji6Rsb0bJOGs3Z4k5XIasPXmcqVK 1ByNGIkjhymNSZ6K5Zr865P/xs9JLN/eiCjo3ImnMfQb35KM2jDkDpBjaixjmgJ5If4k qqjORXohTiz8Gn/yKIbQ22LNli558SResUVLR3kt8kXoJTLf5Es9sGRU3GPwWrHBHNSt qt1xyb5zjYGwrpOawF4iZNiP6UCP/cmEOZZJ0x3wlA9ATUE7P1rfGT8BkmGIuD8RsEnC tYUg== X-Gm-Message-State: APjAAAXak3asYpP9eJ2bJA1VvBysoaMAVTyZWdxmnD5+JU2Uhw8M9LWy iIkJXxmQnjB35K60dfUKe/c= X-Google-Smtp-Source: APXvYqy1o4DnqvcD19gMmNPsciMs9n+AzUt25Yw2ibm5ieYpF8E7FJWJfMRKaeTNL61yJu541XFuTg== X-Received: by 2002:a17:902:e110:: with SMTP id cc16mr7526914plb.147.1554396286248; Thu, 04 Apr 2019 09:44:46 -0700 (PDT) Received: from [10.33.115.113] ([66.170.99.2]) by smtp.gmail.com with ESMTPSA id m3sm21957806pgp.85.2019.04.04.09.44.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 04 Apr 2019 09:44:45 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\)) Subject: Re: [RFC PATCH v9 00/13] Add support for eXclusive Page Frame Ownership From: Nadav Amit In-Reply-To: Date: Thu, 4 Apr 2019 09:44:43 -0700 Cc: X86 ML , linux-arm-kernel@lists.infradead.org, "open list:DOCUMENTATION" , Linux List Kernel Mailing , Linux-MM , LSM List Content-Transfer-Encoding: quoted-printable Message-Id: <3F95B70B-7910-4150-A9D3-05C4D0195B67@gmail.com> References: To: Khalid Aziz X-Mailer: Apple Mail (2.3445.102.3) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Apr 3, 2019, at 10:34 AM, Khalid Aziz = wrote: >=20 > This is another update to the work Juerg, Tycho and Julian have > done on XPFO. Interesting work, but note that it triggers a warning on my system due = to possible deadlock. It seems that the patch-set disables IRQs in xpfo_kunmap() and then might flush remote TLBs when a large page is = split. This is wrong, since it might lead to deadlocks. [ 947.262208] WARNING: CPU: 6 PID: 9892 at kernel/smp.c:416 = smp_call_function_many+0x92/0x250 [ 947.263767] Modules linked in: sb_edac vmw_balloon crct10dif_pclmul = crc32_pclmul joydev ghash_clmulni_intel input_leds intel_rapl_perf = serio_raw mac_hid sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core = vmw_vsock_vmci_transport vsock vmw_vmci iscsi_tcp libiscsi_tcp libiscsi = scsi_transport_iscsi ip_tables x_tables autofs4 btrfs zstd_compress = raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor = async_tx libcrc32c xor raid6_pq raid1 raid0 multipath linear hid_generic = usbhid hid vmwgfx drm_kms_helper syscopyarea sysfillrect sysimgblt = fb_sys_fops ttm drm aesni_intel psmouse aes_x86_64 crypto_simd cryptd = glue_helper mptspi vmxnet3 scsi_transport_spi mptscsih ahci mptbase = libahci i2c_piix4 pata_acpi [ 947.274649] CPU: 6 PID: 9892 Comm: cc1 Not tainted 5.0.0+ #7 [ 947.275804] Hardware name: VMware, Inc. VMware Virtual Platform/440BX = Desktop Reference Platform, BIOS 6.00 07/28/2017 [ 947.277704] RIP: 0010:smp_call_function_many+0x92/0x250 [ 947.278640] Code: 3b 05 66 fc 4e 01 72 26 48 83 c4 10 5b 41 5c 41 5d = 41 5e 41 5f 5d c3 8b 05 2b cc 7e 01 85 c0 75 bf 80 3d a8 99 4e 01 00 75 = b6 <0f> 0b eb b2 44 89 c7 48 c7 c2 a0 9a 61 aa 4c 89 fe 44 89 45 d0 e8 [ 947.281895] RSP: 0000:ffffafe04538f970 EFLAGS: 00010046 [ 947.282821] RAX: 0000000000000000 RBX: 0000000000000006 RCX: = 0000000000000001 [ 947.284084] RDX: 0000000000000000 RSI: ffffffffa9078d70 RDI: = ffffffffaa619aa0 [ 947.285343] RBP: ffffafe04538f9a8 R08: ffff9d7040000ff0 R09: = 0000000000000000 [ 947.286596] R10: 0000000000000000 R11: 0000000000000000 R12: = ffffffffa9078d70 [ 947.287855] R13: 0000000000000000 R14: 0000000000000001 R15: = ffffffffaa619aa0 [ 947.289118] FS: 00007f668b122ac0(0000) GS:ffff9d727fd80000(0000) = knlGS:0000000000000000 [ 947.290550] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 947.291569] CR2: 00007f6688389004 CR3: 0000000224496006 CR4: = 00000000003606e0 [ 947.292861] DR0: 0000000000000000 DR1: 0000000000000000 DR2: = 0000000000000000 [ 947.294125] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: = 0000000000000400 [ 947.295394] Call Trace: [ 947.295854] ? load_new_mm_cr3+0xe0/0xe0 [ 947.296568] on_each_cpu+0x2d/0x60 [ 947.297191] flush_tlb_all+0x1c/0x20 [ 947.297846] __split_large_page+0x5d9/0x640 [ 947.298604] set_kpte+0xfe/0x260 [ 947.299824] get_page_from_freelist+0x1633/0x1680 [ 947.301260] ? lookup_address+0x2d/0x30 [ 947.302550] ? set_kpte+0x1e1/0x260 [ 947.303760] __alloc_pages_nodemask+0x13f/0x2e0 [ 947.305137] alloc_pages_vma+0x7a/0x1c0 [ 947.306378] wp_page_copy+0x201/0xa30 [ 947.307582] ? generic_file_read_iter+0x96a/0xcf0 [ 947.308946] do_wp_page+0x1cc/0x420 [ 947.310086] __handle_mm_fault+0xc0d/0x1600 [ 947.311331] handle_mm_fault+0xe1/0x210 [ 947.312502] __do_page_fault+0x23a/0x4c0 [ 947.313672] ? _cond_resched+0x19/0x30 [ 947.314795] do_page_fault+0x2e/0xe0 [ 947.315878] ? page_fault+0x8/0x30 [ 947.316916] page_fault+0x1e/0x30 [ 947.317930] RIP: 0033:0x76581e [ 947.318893] Code: eb 05 89 d8 48 8d 04 80 48 8d 34 c5 08 00 00 00 48 = 85 ff 74 04 44 8b 67 04 e8 de 80 08 00 81 e3 ff ff ff 7f 48 89 45 00 8b = 10 <44> 89 60 04 81 e2 00 00 00 80 09 da 89 10 c1 ea 18 83 e2 7f 88 50 [ 947.323337] RSP: 002b:00007ffde06c0e40 EFLAGS: 00010202 [ 947.324663] RAX: 00007f6688389000 RBX: 0000000000000004 RCX: = 0000000000000001 [ 947.326317] RDX: 0000000000000000 RSI: 0000000001000001 RDI: = 0000000000000017 [ 947.327973] RBP: 00007f66883882d8 R08: 00000000032e05f0 R09: = 00007f668b30e6f0 [ 947.329619] R10: 0000000000000002 R11: 00000000032e05f0 R12: = 0000000000000000 [ 947.331260] R13: 00007f6688388230 R14: 00007f6688388288 R15: = 00007f668ac3b0a8 [ 947.332911] ---[ end trace 7d605a38c67d83ae ]---= 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=-0.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 5D4CEC4360F for ; 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Thu, 04 Apr 2019 09:44:46 -0700 (PDT) Received: from [10.33.115.113] ([66.170.99.2]) by smtp.gmail.com with ESMTPSA id m3sm21957806pgp.85.2019.04.04.09.44.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 04 Apr 2019 09:44:45 -0700 (PDT) Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\)) Subject: Re: [RFC PATCH v9 00/13] Add support for eXclusive Page Frame Ownership From: Nadav Amit In-Reply-To: Date: Thu, 4 Apr 2019 09:44:43 -0700 Message-Id: <3F95B70B-7910-4150-A9D3-05C4D0195B67@gmail.com> References: To: Khalid Aziz X-Mailer: Apple Mail (2.3445.102.3) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190404_094447_930049_50B84B2C X-CRM114-Status: GOOD ( 11.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "open list:DOCUMENTATION" , X86 ML , Linux List Kernel Mailing , Linux-MM , LSM List , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org > On Apr 3, 2019, at 10:34 AM, Khalid Aziz wrote: > > This is another update to the work Juerg, Tycho and Julian have > done on XPFO. Interesting work, but note that it triggers a warning on my system due to possible deadlock. It seems that the patch-set disables IRQs in xpfo_kunmap() and then might flush remote TLBs when a large page is split. This is wrong, since it might lead to deadlocks. [ 947.262208] WARNING: CPU: 6 PID: 9892 at kernel/smp.c:416 smp_call_function_many+0x92/0x250 [ 947.263767] Modules linked in: sb_edac vmw_balloon crct10dif_pclmul crc32_pclmul joydev ghash_clmulni_intel input_leds intel_rapl_perf serio_raw mac_hid sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core vmw_vsock_vmci_transport vsock vmw_vmci iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx libcrc32c xor raid6_pq raid1 raid0 multipath linear hid_generic usbhid hid vmwgfx drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm aesni_intel psmouse aes_x86_64 crypto_simd cryptd glue_helper mptspi vmxnet3 scsi_transport_spi mptscsih ahci mptbase libahci i2c_piix4 pata_acpi [ 947.274649] CPU: 6 PID: 9892 Comm: cc1 Not tainted 5.0.0+ #7 [ 947.275804] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/28/2017 [ 947.277704] RIP: 0010:smp_call_function_many+0x92/0x250 [ 947.278640] Code: 3b 05 66 fc 4e 01 72 26 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 8b 05 2b cc 7e 01 85 c0 75 bf 80 3d a8 99 4e 01 00 75 b6 <0f> 0b eb b2 44 89 c7 48 c7 c2 a0 9a 61 aa 4c 89 fe 44 89 45 d0 e8 [ 947.281895] RSP: 0000:ffffafe04538f970 EFLAGS: 00010046 [ 947.282821] RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000000001 [ 947.284084] RDX: 0000000000000000 RSI: ffffffffa9078d70 RDI: ffffffffaa619aa0 [ 947.285343] RBP: ffffafe04538f9a8 R08: ffff9d7040000ff0 R09: 0000000000000000 [ 947.286596] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa9078d70 [ 947.287855] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffffaa619aa0 [ 947.289118] FS: 00007f668b122ac0(0000) GS:ffff9d727fd80000(0000) knlGS:0000000000000000 [ 947.290550] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 947.291569] CR2: 00007f6688389004 CR3: 0000000224496006 CR4: 00000000003606e0 [ 947.292861] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 947.294125] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 947.295394] Call Trace: [ 947.295854] ? load_new_mm_cr3+0xe0/0xe0 [ 947.296568] on_each_cpu+0x2d/0x60 [ 947.297191] flush_tlb_all+0x1c/0x20 [ 947.297846] __split_large_page+0x5d9/0x640 [ 947.298604] set_kpte+0xfe/0x260 [ 947.299824] get_page_from_freelist+0x1633/0x1680 [ 947.301260] ? lookup_address+0x2d/0x30 [ 947.302550] ? set_kpte+0x1e1/0x260 [ 947.303760] __alloc_pages_nodemask+0x13f/0x2e0 [ 947.305137] alloc_pages_vma+0x7a/0x1c0 [ 947.306378] wp_page_copy+0x201/0xa30 [ 947.307582] ? generic_file_read_iter+0x96a/0xcf0 [ 947.308946] do_wp_page+0x1cc/0x420 [ 947.310086] __handle_mm_fault+0xc0d/0x1600 [ 947.311331] handle_mm_fault+0xe1/0x210 [ 947.312502] __do_page_fault+0x23a/0x4c0 [ 947.313672] ? _cond_resched+0x19/0x30 [ 947.314795] do_page_fault+0x2e/0xe0 [ 947.315878] ? page_fault+0x8/0x30 [ 947.316916] page_fault+0x1e/0x30 [ 947.317930] RIP: 0033:0x76581e [ 947.318893] Code: eb 05 89 d8 48 8d 04 80 48 8d 34 c5 08 00 00 00 48 85 ff 74 04 44 8b 67 04 e8 de 80 08 00 81 e3 ff ff ff 7f 48 89 45 00 8b 10 <44> 89 60 04 81 e2 00 00 00 80 09 da 89 10 c1 ea 18 83 e2 7f 88 50 [ 947.323337] RSP: 002b:00007ffde06c0e40 EFLAGS: 00010202 [ 947.324663] RAX: 00007f6688389000 RBX: 0000000000000004 RCX: 0000000000000001 [ 947.326317] RDX: 0000000000000000 RSI: 0000000001000001 RDI: 0000000000000017 [ 947.327973] RBP: 00007f66883882d8 R08: 00000000032e05f0 R09: 00007f668b30e6f0 [ 947.329619] R10: 0000000000000002 R11: 00000000032e05f0 R12: 0000000000000000 [ 947.331260] R13: 00007f6688388230 R14: 00007f6688388288 R15: 00007f668ac3b0a8 [ 947.332911] ---[ end trace 7d605a38c67d83ae ]--- _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel