EulerOS 的iso镜像在哪里下载，华为镜像站只有软件包的提供，没有iso镜像的下载

触发条件：该问题为操作系统xfs内部实现bug，存在于EulerOS 2.9之前的所有历史版本。故障现象：数据库实例进程状态变为D状态，进程hang，集群状态无法降级。业务阻塞，数据库实例进程无法kill，需要重启OS恢复。判断方法：步骤1：使用管理员用户登录数据库。步骤2：对数据库环境进行检查。如果OS为EulerOS 2.9之前的所有历史版本，则继续执行下面的步骤，进行D进程确认；否则跳过。步骤3：执行如下命令获取进程状态ps -elf | grep gaussdb步骤4：如果gaussdb进程处于D状态（僵死状态）时，则通过如下方法检查是触发了xfs的D进程bug。通过步骤3获取到gaussdb进程的pid。查看进程栈信息。如果栈信息是如下内容，则表示当前进程是僵死在write_cache_pages函数中。​​​​​​​【措施和方案】給当前的数据库环境打xfs热补丁。具体实现参见 https://bbs.huaweicloud.com/forum/thread-0207147167992868006-1-1.html

【措施和方案】请联系DWS运维人员，提变更保障整改。在support中下载xfs热补丁包规避措施步骤：使用root用户登录需要部署补丁的机器，进入/root目录将附件中的xfs_files.tar.gz包拷贝至补丁机器的/root目录，并解压缩；创建临时文件/root/fix_patch_by_self.sh为解压缩后的文件fix_patch_by_self.sh赋权: chmod +x /root/fix_patch_by_self.sh执行热补丁部署sh fix_patch_by_self.sh -i回滚热补丁（选做）sh fix_patch_by_self.sh -u

1. 问题现象：进程偶发性D住并且无法恢复，其堆栈信息如下：2 原因说明： Xfs在执行do_writepages时产生死锁。xfs write死锁，IO现场Hang。 ​3 问题处理 补丁修改内容参考：参加附件xfs_patch.txt4 OS分析参考 https://lore.kernel.org/all/20181218043626.GA31274@dastard/T/ 

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想适配EulerOS V2.0SP10(x86_64)的系统，找遍了好像都没有下载的地方

问题在 EulerOS2.8 aarch64 上运行 eBPF 程序时报错：invalid size of register fill经过尝试，解决了该问题，但问题出现的原因不明，期望能获得帮助和相关信息：关于修改后的 bpf 字节码解决该问题和内核中的 bpf 验证器会报出该错误的原因或提供对应内核的的 kernel/bpf/verifier.c 的获取方式报错信息及可能的上下文：12: r1 = 0x10000000000 14: *(u64 *)(r10 -64) = r1 // ... 57: r2 = *(u32 *)(r10 -60) ERROR: invalid size of register fill.内核信息Linux ecs-4bd9 4.19.36-vhulk1907.1.0.h1229.eulerosv2r8.aarch64 #1 SMP Thu May 19 17:47:35 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux解决方法（尝试）使用 llvm v10.0.0 编译项目修改前，验证器报错： invalid size of register fill；可能的上下文，字节码12: r1 = 0x10000000000 14: *(u64 *)(r10 -64) = r1 // ... 57: r2 = *(u32 *)(r10 -60) ERROR: invalid size of register fill.修改后通过 bpf 验证器；字节码：12: r9 = 0 14: *(u64 *)(r10 - 64) = r9 15: r6 = 1 16: *(u8 *)(r10 - 59) = r6 ... 58: r2 = *(u32 *)(r10 - 60).报错时的具体的 bpf 程序的字节码：Disassembly of section kprobe/ip6_make_skb: 0000000000000000 <kprobe__ip6_make_skb>: ; { 0: bf 17 00 00 00 00 00 00 r7 = r1 1: 85 00 00 00 05 00 00 00 call 5 2: 7b 0a 90 ff 00 00 00 00 *(u64 *)(r10 - 112) = r0 3: 79 78 70 00 00 00 00 00 r8 = *(u64 *)(r7 + 112) 4: 79 79 58 00 00 00 00 00 r9 = *(u64 *)(r7 + 88) 5: 07 09 00 00 f8 ff ff ff r9 += -8 6: 85 00 00 00 0e 00 00 00 call 14 ; LOAD_OFFSET("kernel_version", var); 7: 18 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r1 = 0 ll 0000000000000038: R_BPF_64_64 kernel_version 9: 18 02 00 00 00 00 00 00 00 00 00 00 07 00 04 00 r2 = 1125929971613696 ll ; if (pre_4_7_0 == 0) 11: 2d 12 47 00 00 00 00 00 if r2 > r1 goto +71 <LBB12_19> 12: 18 01 00 00 00 00 00 00 00 00 00 00 00 01 00 00 r1 = 1099511627776 ll ; __builtin_memset(&conn, 0, sizeof(conn)); 14: 7b 1a c0 ff 00 00 00 00 *(u64 *)(r10 - 64) = r1 15: b7 06 00 00 00 00 00 00 r6 = 0 16: 7b 6a b8 ff 00 00 00 00 *(u64 *)(r10 - 72) = r6 ; conn_info->pid = pid_tgid >> 32; 17: 77 00 00 00 20 00 00 00 r0 >>= 32 18: 63 0a bc ff 00 00 00 00 *(u32 *)(r10 - 68) = r0 ; __builtin_memset(&conn, 0, sizeof(conn)); 19: 7b 6a b0 ff 00 00 00 00 *(u64 *)(r10 - 80) = r6 20: 7b 6a a8 ff 00 00 00 00 *(u64 *)(r10 - 88) = r6 21: 7b 6a a0 ff 00 00 00 00 *(u64 *)(r10 - 96) = r6 22: 7b 6a 98 ff 00 00 00 00 *(u64 *)(r10 - 104) = r6 ; __u32 inum = 0; 23: 63 6a c8 ff 00 00 00 00 *(u32 *)(r10 - 56) = r6 ; struct net *netptr = NULL; 24: 7b 6a d0 ff 00 00 00 00 *(u64 *)(r10 - 48) = r6 ; LOAD_OFFSET("offset_sk_net", var); 25: 18 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r1 = 0 ll 00000000000000c8: R_BPF_64_64 offset_sk_net ; bpf_probe_read(&netptr, sizeof(netptr), (__u8 *)sk + offset_sk_net); 27: bf 83 00 00 00 00 00 00 r3 = r8 28: 0f 13 00 00 00 00 00 00 r3 += r1 29: bf a1 00 00 00 00 00 00 r1 = r10 30: 07 01 00 00 d0 ff ff ff r1 += -48 ; bpf_probe_read(&netptr, sizeof(netptr), (__u8 *)sk + offset_sk_net); 31: b7 02 00 00 08 00 00 00 r2 = 8 32: 85 00 00 00 04 00 00 00 call 4 ; LOAD_OFFSET("offset_ns_common_inum", var); 33: 18 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r1 = 0 ll 0000000000000108: R_BPF_64_64 offset_ns_common_inum ; bpf_probe_read(&inum, sizeof(inum), (__u8 *)netptr + offset_ns_common_inum); 35: 79 a3 d0 ff 00 00 00 00 r3 = *(u64 *)(r10 - 48) 36: 0f 13 00 00 00 00 00 00 r3 += r1 37: bf a1 00 00 00 00 00 00 r1 = r10 38: 07 01 00 00 c8 ff ff ff r1 += -56 ; bpf_probe_read(&inum, sizeof(inum), (__u8 *)netptr + offset_ns_common_inum); 39: b7 02 00 00 04 00 00 00 r2 = 4 40: 85 00 00 00 04 00 00 00 call 4 ; return inum; 41: 61 a1 c8 ff 00 00 00 00 r1 = *(u32 *)(r10 - 56) ; conn_info->netns = read_netns(sk); 42: 63 1a c0 ff 00 00 00 00 *(u32 *)(r10 - 64) = r1 ; unsigned short family = AF_UNSPEC; 43: 6b 6a c8 ff 00 00 00 00 *(u16 *)(r10 - 56) = r6 ; LOAD_OFFSET("offset_sk_family", var); 44: 18 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r1 = 0 ll 0000000000000160: R_BPF_64_64 offset_sk_family ; bpf_probe_read(&family, sizeof(family), (__u8 *)sk + offset_sk_family); 46: bf 83 00 00 00 00 00 00 r3 = r8 47: 0f 13 00 00 00 00 00 00 r3 += r1 48: bf a1 00 00 00 00 00 00 r1 = r10 49: 07 01 00 00 c8 ff ff ff r1 += -56 ; bpf_probe_read(&family, sizeof(family), (__u8 *)sk + offset_sk_family); 50: b7 02 00 00 02 00 00 00 r2 = 2 51: 85 00 00 00 04 00 00 00 call 4 ; if (family == AF_INET) 52: 69 a1 c8 ff 00 00 00 00 r1 = *(u16 *)(r10 - 56) 53: 15 01 64 00 0a 00 00 00 if r1 == 10 goto +100 <LBB12_4> 54: 55 01 ad 00 02 00 00 00 if r1 != 2 goto +173 <LBB12_8> 55: 18 01 00 00 00 ff ff ff 00 00 00 00 00 00 00 00 r1 = 4294967040 ll ; conn_info->meta = (conn_info->meta & ~CONN_L3_MASK) | CONN_L3_IPv4; 57: 61 a2 c4 ff 00 00 00 00 r2 = *(u32 *)(r10 - 60) 58: 5f 12 00 00 00 00 00 00 r2 &= r1 59: 63 2a c4 ff 00 00 00 00 *(u32 *)(r10 - 60) = r2

为啥刚开始考试，自动检测异常自动提交？？？？