July 2023 - Kernel - mailweb.openeuler.org

[PATCH openEuler-22.03-LTS 0/2] Fix CDM node problems
by Zhang Zekun 24 Jul '23

24 Jul '23

Fix problem introduced by feature CDM node, which might alloc memory from other no cdm nodes. Zhou Guanghui (2): mm: fix ignore cpuset enforcement mm: fix alloc CDM node memory for MPOL_BIND mm/page_alloc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) -- 2.17.1

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答复: [RFC 1/1] Optimizing the rand function on arm64 platforms
by tiantao (H) 24 Jul '23

24 Jul '23

Thanks for the reply. Using FEAT_RNG can be a very big performance boost, any suggestions for applying the FEAT_RNG feature to glibc? -----邮件原件----- 发件人: Xi Ruoyao <xry111(a)xry111.site> 发送时间: 2023年7月24日 11:50 收件人: tiantao (H) <tiantao6(a)hisilicon.com>; libc-alpha(a)sourceware.org 抄送: kernel(a)openeuler.org 主题: Re: [RFC 1/1] Optimizing the rand function on arm64 platforms On Mon, 2023-07-24 at 10:32 +0800, Tian Tao via Libc-alpha wrote: > Armv8.5 adds the FEAT_RNG feature so that true random numbers can be > obtained from the cpu. This optimization is therefore proposed for the > arm64 platform. NAK. Glibc documentation explicitly says: You can obtain repeatable sequences of numbers on a particular machine type by specifying the same initial seed value for the random number generator. This rand() implementation obviously does not satisfy this requirement. > > Signed-off-by: Tian Tao <tiantao6(a)hisilicon.com> > --- > stdlib/rand.c | 32 ++++++++++++++++++++++++++++++++ > 1 file changed, 32 insertions(+) > > diff --git a/stdlib/rand.c b/stdlib/rand.c index > c250c065e4..f199dbd65f 100644 > --- a/stdlib/rand.c > +++ b/stdlib/rand.c > @@ -19,10 +19,42 @@ > > #undef rand > > +#ifdef __aarch64__ > +// A global variable to indicate whether rndr instruction is > supported > +static int rndr_supported = 0; > +// A function prototype to check rndr support static void > +check_rndr_support (void) __attribute__ ((constructor)); #endif > > /* Return a random integer between 0 and RAND_MAX. */ > int > rand (void) > { > + // Use armv8.5 rndr instruction if supported #ifdef __aarch64__ > + if (rndr_supported) { > + unsigned int r; > + asm volatile("mrs %0, s3_3_c2_c4_0" : "=r" (r)); > + // Discard the least random bit > + r >>=1; > + return (int) r; > + } > +#endif > return (int) __random (); > } > + > +#ifdef __aarch64__ > +// A function to check rndr support and set the global variable > accordingly > +static void > +check_rndr_support (void) > +{ > + unsigned long isar0; > + // Read the ID_AA64ISAR0_EL1 register to check the rndr feature > + asm volatile("mrs %0, id_aa64isar0_el1" : "=r" (isar0)); > + // Check the bits [63:60] for the rndr feature > + if ((isar0 >> 60) & 0xf) { > + // Set the global variable to indicate rndr support > + rndr_supported = 1; > + } > +} > +#endif -- Xi Ruoyao <xry111(a)xry111.site> School of Aerospace Science and Technology, Xidian University

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Re: EAS适配大数据环境验证
by Ruan Jinjie 24 Jul '23

24 Jul '23

关键线程demo 大数据测试 On 2023/7/20 10:51, Ruan Jinjie wrote: > bpftrace测调度延迟脚本 > > On 2023/7/18 12:06, Ruan Jinjie wrote: >> >> >> On 2023/7/17 10:47, Ruan Jinjie wrote: >>> >>> >>> On 2023/7/15 18:18, Ruan Jinjie wrote: >>>> >>>> >>>> On 2023/7/15 10:36, Ruan Jinjie wrote: >>>>> >>>>> >>>>> On 2023/7/14 13:18, Ruan Jinjie wrote: >>>>>> >>>>>> >>>>>> On 2023/7/13 13:03, Ruan Jinjie wrote: >>>>>>> 潮汐适配SP2 >>>>>>> >>>>>>> On 2023/7/13 10:58, Ruan Jinjie wrote: >>>>>>>> >>>>>>>> >>>>>>>> On 2023/7/12 17:23, Ruan Jinjie wrote: >>>>>>>>> >>>>>>>>> >>>>>>>>> On 2023/7/5 17:24, Ruan Jinjie wrote: >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On 2023/7/5 17:19, Ruan Jinjie wrote: >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> On 2023/7/4 20:34, Ruan Jinjie wrote: >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> On 2023/7/4 13:04, Ruan Jinjie wrote: >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> On 2023/6/3 10:52, Ruan Jinjie wrote:

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[RFC 1/1] Optimizing the rand function on arm64 platforms
by Tian Tao 24 Jul '23

24 Jul '23

Armv8.5 adds the FEAT_RNG feature so that true random numbers can be obtained from the cpu. This optimization is therefore proposed for the arm64 platform. Signed-off-by: Tian Tao <tiantao6(a)hisilicon.com> --- stdlib/rand.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/stdlib/rand.c b/stdlib/rand.c index c250c065e4..f199dbd65f 100644 --- a/stdlib/rand.c +++ b/stdlib/rand.c @@ -19,10 +19,42 @@ #undef rand +#ifdef __aarch64__ +// A global variable to indicate whether rndr instruction is supported +static int rndr_supported = 0; +// A function prototype to check rndr support +static void check_rndr_support (void) __attribute__ ((constructor)); +#endif /* Return a random integer between 0 and RAND_MAX. */ int rand (void) { + // Use armv8.5 rndr instruction if supported +#ifdef __aarch64__ + if (rndr_supported) { + unsigned int r; + asm volatile("mrs %0, s3_3_c2_c4_0" : "=r" (r)); + // Discard the least random bit + r >>=1; + return (int) r; + } +#endif return (int) __random (); } + +#ifdef __aarch64__ +// A function to check rndr support and set the global variable accordingly +static void +check_rndr_support (void) +{ + unsigned long isar0; + // Read the ID_AA64ISAR0_EL1 register to check the rndr feature + asm volatile("mrs %0, id_aa64isar0_el1" : "=r" (isar0)); + // Check the bits [63:60] for the rndr feature + if ((isar0 >> 60) & 0xf) { + // Set the global variable to indicate rndr support + rndr_supported = 1; + } +} +#endif -- 2.33.0

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【会议通知】 openEuler-23.09开发讨论
by Meeting Book 21 Jul '23

21 Jul '23

会议主题 Subject openEuler-23.09开发讨论会议时间 Time 2023-07-24 10:30-12:00 (UTC+08:00)Beijing 会议地点 Location Welink视频会议 Welink Video Meeting 加入会议(External)<https://meeting.huaweicloud.com/welink/#/j/97708050/7CrJkkOXwkz174GgyAwFZLc…> 会议ID Meeting ID 97708050 Guest密码 Voice access code 890236 召集人 Convener 郑增凯提示 Tips 请点击会议链接加入会议,首次使用请在入会界面根据提示下载并安装客户端后输入ID入会。 Click the meeting link to join the meeting. For the first time, download and install the client as prompted and enter the ID to join the meeting

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[PATCH openEuler-23.09 0/8] arm64: Add framework to turn an IPI as NMI
by Ruan Jinjie 21 Jul '23

21 Jul '23

arm64: Add framework to turn an IPI as NMI Sumit Garg (7): arm64: Add framework to turn IPI as NMI irqchip/gic-v3: Enable support for SGIs to act as NMIs arm64: smp: Assign and setup an IPI as NMI nmi: backtrace: Allow runtime arch specific override arm64: ipi_nmi: Add support for NMI backtrace kgdb: Expose default CPUs roundup fallback mechanism arm64: kgdb: Roundup cpus using IPI as NMI Xiongfeng Wang (1): arm64: ipi_nmi: fix compile error when CONFIG_KGDB is disabled arch/arm/include/asm/irq.h | 2 +- arch/arm/kernel/smp.c | 3 +- arch/arm64/include/asm/irq.h | 6 +++ arch/arm64/include/asm/nmi.h | 17 +++++++ arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/ipi_nmi.c | 85 ++++++++++++++++++++++++++++++++ arch/arm64/kernel/kgdb.c | 18 +++++++ arch/arm64/kernel/smp.c | 8 +++ arch/mips/include/asm/irq.h | 2 +- arch/mips/kernel/process.c | 3 +- arch/powerpc/include/asm/nmi.h | 2 +- arch/powerpc/kernel/stacktrace.c | 3 +- arch/sparc/include/asm/irq_64.h | 2 +- arch/sparc/kernel/process_64.c | 4 +- arch/x86/include/asm/irq.h | 2 +- arch/x86/kernel/apic/hw_nmi.c | 3 +- drivers/irqchip/irq-gic-v3.c | 29 ++++++++--- include/linux/kgdb.h | 12 +++++ include/linux/nmi.h | 12 ++--- kernel/debug/debug_core.c | 8 ++- 20 files changed, 195 insertions(+), 28 deletions(-) create mode 100644 arch/arm64/include/asm/nmi.h create mode 100644 arch/arm64/kernel/ipi_nmi.c -- 2.34.1

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[PATCH OLK-5.10] ipv6: Fix an uninit variable access bug in __ip6_make_skb()
by Wang Yufen 21 Jul '23

21 Jul '23

From: Ziyang Xuan <william.xuanziyang(a)huawei.com> stable inclusion from stable-v5.10.178 commit 605b056d63302ae84eb136e88d4df49124bd5e0d category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I71Z4N Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit ea30388baebcce37fd594d425a65037ca35e59e8 ] Syzbot reported a bug as following: ===================================================== BUG: KMSAN: uninit-value in arch_atomic64_inc arch/x86/include/asm/atomic64_64.h:88 [inline] BUG: KMSAN: uninit-value in arch_atomic_long_inc include/linux/atomic/atomic-long.h:161 [inline] BUG: KMSAN: uninit-value in atomic_long_inc include/linux/atomic/atomic-instrumented.h:1429 [inline] BUG: KMSAN: uninit-value in __ip6_make_skb+0x2f37/0x30f0 net/ipv6/ip6_output.c:1956 arch_atomic64_inc arch/x86/include/asm/atomic64_64.h:88 [inline] arch_atomic_long_inc include/linux/atomic/atomic-long.h:161 [inline] atomic_long_inc include/linux/atomic/atomic-instrumented.h:1429 [inline] __ip6_make_skb+0x2f37/0x30f0 net/ipv6/ip6_output.c:1956 ip6_finish_skb include/net/ipv6.h:1122 [inline] ip6_push_pending_frames+0x10e/0x550 net/ipv6/ip6_output.c:1987 rawv6_push_pending_frames+0xb12/0xb90 net/ipv6/raw.c:579 rawv6_sendmsg+0x297e/0x2e60 net/ipv6/raw.c:922 inet_sendmsg+0x101/0x180 net/ipv4/af_inet.c:827 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0xa8e/0xe70 net/socket.c:2476 ___sys_sendmsg+0x2a1/0x3f0 net/socket.c:2530 __sys_sendmsg net/socket.c:2559 [inline] __do_sys_sendmsg net/socket.c:2568 [inline] __se_sys_sendmsg net/socket.c:2566 [inline] __x64_sys_sendmsg+0x367/0x540 net/socket.c:2566 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook mm/slab.h:766 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988 kmalloc_reserve net/core/skbuff.c:492 [inline] __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565 alloc_skb include/linux/skbuff.h:1270 [inline] __ip6_append_data+0x51c1/0x6bb0 net/ipv6/ip6_output.c:1684 ip6_append_data+0x411/0x580 net/ipv6/ip6_output.c:1854 rawv6_sendmsg+0x2882/0x2e60 net/ipv6/raw.c:915 inet_sendmsg+0x101/0x180 net/ipv4/af_inet.c:827 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0xa8e/0xe70 net/socket.c:2476 ___sys_sendmsg+0x2a1/0x3f0 net/socket.c:2530 __sys_sendmsg net/socket.c:2559 [inline] __do_sys_sendmsg net/socket.c:2568 [inline] __se_sys_sendmsg net/socket.c:2566 [inline] __x64_sys_sendmsg+0x367/0x540 net/socket.c:2566 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd It is because icmp6hdr does not in skb linear region under the scenario of SOCK_RAW socket. Access icmp6_hdr(skb)->icmp6_type directly will trigger the uninit variable access bug. Use a local variable icmp6_type to carry the correct value in different scenarios. Fixes: 14878f75abd5 ("[IPV6]: Add ICMPMsgStats MIB (RFC 4293) [rev 2]") Reported-by: syzbot+8257f4dcef79de670baf(a)syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?id=3d605ec1d0a7f2a269a1a6936ac7f2b85975ee… Signed-off-by: Ziyang Xuan <william.xuanziyang(a)huawei.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Wang Hai <wanghai38(a)huawei.com> Signed-off-by: Wang Yufen <wangyufen(a)huawei.com> --- net/ipv6/ip6_output.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index f30cc72..8be38a1 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1920,8 +1920,13 @@ struct sk_buff *__ip6_make_skb(struct sock *sk, IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); if (proto == IPPROTO_ICMPV6) { struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb)); + u8 icmp6_type; - ICMP6MSGOUT_INC_STATS(net, idev, icmp6_hdr(skb)->icmp6_type); + if (sk->sk_socket->type == SOCK_RAW && !inet_sk(sk)->hdrincl) + icmp6_type = fl6->fl6_icmp_type; + else + icmp6_type = icmp6_hdr(skb)->icmp6_type; + ICMP6MSGOUT_INC_STATS(net, idev, icmp6_type); ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); } -- 1.8.3.1

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[PATCH openEuler-22.03-LTS-SP2] block: don't set GD_NEED_PART_SCAN if scan partition failed
by Li Lingfeng 21 Jul '23

21 Jul '23

From: Yu Kuai <yukuai3(a)huawei.com> mainline inclusion from mainline-v6.3-rc6~9^2 commit 3723091ea1884d599cc8b8bf719d6f42e8d4d8b1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7F7J3 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Currently if disk_scan_partitions() failed, GD_NEED_PART_SCAN will still set, and partition scan will be proceed again when blkdev_get_by_dev() is called. However, this will cause a problem that re-assemble partitioned raid device will creat partition for underlying disk. Test procedure: mdadm -CR /dev/md0 -l 1 -n 2 /dev/sda /dev/sdb -e 1.0 sgdisk -n 0:0:+100MiB /dev/md0 blockdev --rereadpt /dev/sda blockdev --rereadpt /dev/sdb mdadm -S /dev/md0 mdadm -A /dev/md0 /dev/sda /dev/sdb Test result: underlying disk partition and raid partition can be observed at the same time Note that this can still happen in come corner cases that GD_NEED_PART_SCAN can be set for underlying disk while re-assemble raid device. Fixes: e5cfefa97bcc ("block: fix scan partition for exclusively open device again") Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Ming Lei <ming.lei(a)redhat.com> Signed-off-by: Yu Kuai <yukuai3(a)huawei.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Conflicts: block/genhd.c Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- block/genhd.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/block/genhd.c b/block/genhd.c index 3c34dd011585..83f407e1563a 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -770,6 +770,13 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode) else blkdev_put(bdev, mode & ~FMODE_EXCL); + /* + * If blkdev_get_by_dev() failed early, GD_NEED_PART_SCAN is still set, + * and this will cause that re-assemble partitioned raid device will + * creat partition for underlying disk. + */ + clear_bit(GD_NEED_PART_SCAN, &disk->state); + if (!(mode & FMODE_EXCL)) { bd_abort_claiming(claim, claim, disk_scan_partitions); bdput(claim); -- 2.31.1

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[PATCH openEuler-22.03-LTS-SP1] block: don't set GD_NEED_PART_SCAN if scan partition failed
by Li Lingfeng 21 Jul '23

21 Jul '23

From: Yu Kuai <yukuai3(a)huawei.com> mainline inclusion from mainline-v6.3-rc6~9^2 commit 3723091ea1884d599cc8b8bf719d6f42e8d4d8b1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7F7J3 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Currently if disk_scan_partitions() failed, GD_NEED_PART_SCAN will still set, and partition scan will be proceed again when blkdev_get_by_dev() is called. However, this will cause a problem that re-assemble partitioned raid device will creat partition for underlying disk. Test procedure: mdadm -CR /dev/md0 -l 1 -n 2 /dev/sda /dev/sdb -e 1.0 sgdisk -n 0:0:+100MiB /dev/md0 blockdev --rereadpt /dev/sda blockdev --rereadpt /dev/sdb mdadm -S /dev/md0 mdadm -A /dev/md0 /dev/sda /dev/sdb Test result: underlying disk partition and raid partition can be observed at the same time Note that this can still happen in come corner cases that GD_NEED_PART_SCAN can be set for underlying disk while re-assemble raid device. Fixes: e5cfefa97bcc ("block: fix scan partition for exclusively open device again") Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Ming Lei <ming.lei(a)redhat.com> Signed-off-by: Yu Kuai <yukuai3(a)huawei.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Conflicts: block/genhd.c Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- block/genhd.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/block/genhd.c b/block/genhd.c index 3c34dd011585..83f407e1563a 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -770,6 +770,13 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode) else blkdev_put(bdev, mode & ~FMODE_EXCL); + /* + * If blkdev_get_by_dev() failed early, GD_NEED_PART_SCAN is still set, + * and this will cause that re-assemble partitioned raid device will + * creat partition for underlying disk. + */ + clear_bit(GD_NEED_PART_SCAN, &disk->state); + if (!(mode & FMODE_EXCL)) { bd_abort_claiming(claim, claim, disk_scan_partitions); bdput(claim); -- 2.31.1

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[PATCH openEuler-22.03-LTS] block: don't set GD_NEED_PART_SCAN if scan partition failed
by Li Lingfeng 21 Jul '23

21 Jul '23

From: Yu Kuai <yukuai3(a)huawei.com> mainline inclusion from mainline-v6.3-rc6 commit 3723091ea1884d599cc8b8bf719d6f42e8d4d8b1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7F7J3 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Currently if disk_scan_partitions() failed, GD_NEED_PART_SCAN will still set, and partition scan will be proceed again when blkdev_get_by_dev() is called. However, this will cause a problem that re-assemble partitioned raid device will creat partition for underlying disk. Test procedure: mdadm -CR /dev/md0 -l 1 -n 2 /dev/sda /dev/sdb -e 1.0 sgdisk -n 0:0:+100MiB /dev/md0 blockdev --rereadpt /dev/sda blockdev --rereadpt /dev/sdb mdadm -S /dev/md0 mdadm -A /dev/md0 /dev/sda /dev/sdb Test result: underlying disk partition and raid partition can be observed at the same time Note that this can still happen in come corner cases that GD_NEED_PART_SCAN can be set for underlying disk while re-assemble raid device. Fixes: e5cfefa97bcc ("block: fix scan partition for exclusively open device again") Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Ming Lei <ming.lei(a)redhat.com> Signed-off-by: Yu Kuai <yukuai3(a)huawei.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Conflicts: block/genhd.c Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- block/genhd.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/block/genhd.c b/block/genhd.c index 3c34dd011585..83f407e1563a 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -770,6 +770,13 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode) else blkdev_put(bdev, mode & ~FMODE_EXCL); + /* + * If blkdev_get_by_dev() failed early, GD_NEED_PART_SCAN is still set, + * and this will cause that re-assemble partitioned raid device will + * creat partition for underlying disk. + */ + clear_bit(GD_NEED_PART_SCAN, &disk->state); + if (!(mode & FMODE_EXCL)) { bd_abort_claiming(claim, claim, disk_scan_partitions); bdput(claim); -- 2.31.1

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