Perf hardware events odroid XU3 #181
Comments
|
Hello @emilienkofman The reason behind we didn't leave performance counters enabled is because at this time you can only enable it for A15 or A7 and not both clusters at the same time. As described on the official wiki: http://odroid.com/dokuwiki/doku.php?id=en:odroid_linux_performance_counter |
|
Thank you, I thought that maybe we could enable one or the other as it's still a better solution that none of them? As long as it's documented somewhere! I admit I have no clue about enabling both, can you suggest something? Maybe it has been fixed in an other project that uses the same Exynos HMP chip? |
mdrjr
pushed a commit
that referenced
this issue
Sep 4, 2017
commit 3d46a44 upstream. PID: 614 TASK: ffff882a739da580 CPU: 3 COMMAND: "ocfs2dc" #0 [ffff882ecc3759b0] machine_kexec at ffffffff8103b35d #1 [ffff882ecc375a20] crash_kexec at ffffffff810b95b5 #2 [ffff882ecc375af0] oops_end at ffffffff815091d8 #3 [ffff882ecc375b20] die at ffffffff8101868b #4 [ffff882ecc375b50] do_trap at ffffffff81508bb0 #5 [ffff882ecc375ba0] do_invalid_op at ffffffff810165e5 #6 [ffff882ecc375c40] invalid_op at ffffffff815116fb [exception RIP: ocfs2_ci_checkpointed+208] RIP: ffffffffa0a7e940 RSP: ffff882ecc375cf0 RFLAGS: 00010002 RAX: 0000000000000001 RBX: 000000000000654b RCX: ffff8812dc83f1f8 RDX: 00000000000017d9 RSI: ffff8812dc83f1f8 RDI: ffffffffa0b2c318 RBP: ffff882ecc375d20 R8: ffff882ef6ecfa60 R9: ffff88301f272200 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffffffffff R13: ffff8812dc83f4f0 R14: 0000000000000000 R15: ffff8812dc83f1f8 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #7 [ffff882ecc375d28] ocfs2_check_meta_downconvert at ffffffffa0a7edbd [ocfs2] #8 [ffff882ecc375d38] ocfs2_unblock_lock at ffffffffa0a84af8 [ocfs2] #9 [ffff882ecc375dc8] ocfs2_process_blocked_lock at ffffffffa0a85285 [ocfs2] assert is tripped because the tran is not checkpointed and the lock level is PR. Some time ago, chmod command had been executed. As result, the following call chain left the inode cluster lock in PR state, latter on causing the assert. system_call_fastpath -> my_chmod -> sys_chmod -> sys_fchmodat -> notify_change -> ocfs2_setattr -> posix_acl_chmod -> ocfs2_iop_set_acl -> ocfs2_set_acl -> ocfs2_acl_set_mode Here is how. 1119 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) 1120 { 1247 ocfs2_inode_unlock(inode, 1); <<< WRONG thing to do. .. 1258 if (!status && attr->ia_valid & ATTR_MODE) { 1259 status = posix_acl_chmod(inode, inode->i_mode); 519 posix_acl_chmod(struct inode *inode, umode_t mode) 520 { .. 539 ret = inode->i_op->set_acl(inode, acl, ACL_TYPE_ACCESS); 287 int ocfs2_iop_set_acl(struct inode *inode, struct posix_acl *acl, ... 288 { 289 return ocfs2_set_acl(NULL, inode, NULL, type, acl, NULL, NULL); 224 int ocfs2_set_acl(handle_t *handle, 225 struct inode *inode, ... 231 { .. 252 ret = ocfs2_acl_set_mode(inode, di_bh, 253 handle, mode); 168 static int ocfs2_acl_set_mode(struct inode *inode, struct buffer_head ... 170 { 183 if (handle == NULL) { >>> BUG: inode lock not held in ex at this point <<< 184 handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), 185 OCFS2_INODE_UPDATE_CREDITS); ocfs2_setattr.#1247 we unlock and at #1259 call posix_acl_chmod. When we reach ocfs2_acl_set_mode.#181 and do trans, the inode cluster lock is not held in EX mode (it should be). How this could have happended? We are the lock master, were holding lock EX and have released it in ocfs2_setattr.#1247. Note that there are no holders of this lock at this point. Another node needs the lock in PR, and we downconvert from EX to PR. So the inode lock is PR when do the trans in ocfs2_acl_set_mode.#184. The trans stays in core (not flushed to disc). Now another node want the lock in EX, downconvert thread gets kicked (the one that tripped assert abovt), finds an unflushed trans but the lock is not EX (it is PR). If the lock was at EX, it would have flushed the trans ocfs2_ci_checkpointed -> ocfs2_start_checkpoint before downconverting (to NULL) for the request. ocfs2_setattr must not drop inode lock ex in this code path. If it does, takes it again before the trans, say in ocfs2_set_acl, another cluster node can get in between, execute another setattr, overwriting the one in progress on this node, resulting in a mode acl size combo that is a mix of the two. Orabug: 20189959 Signed-off-by: Tariq Saeed <tariq.x.saeed@oracle.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <joseph.qi@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Willy Tarreau <w@1wt.eu>
mdrjr
pushed a commit
that referenced
this issue
Jun 18, 2018
…bj_dump() commit b715345 upstream. In the nft_ct_helper_obj_dump(), always priv->helper4 is dereferenced. But if family is ipv6, priv->helper6 should be dereferenced. Steps to reproduces: #test.nft table ip6 filter { ct helper ftp { type "ftp" protocol tcp } chain input { type filter hook input priority 4; ct helper set "ftp" } } %nft -f test.nft %nft list ruleset we can see the below messages: [ 916.286233] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 916.294777] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI [ 916.302613] Modules linked in: nft_objref nf_conntrack_sip nf_conntrack_snmp nf_conntrack_broadcast nf_conntrack_ftp nft_ct nf_conntrack nf_tables nfnetlink [last unloaded: nfnetlink] [ 916.318758] CPU: 1 PID: 2093 Comm: nft Not tainted 4.17.0-rc4+ #181 [ 916.326772] Hardware name: To be filled by O.E.M. To be filled by O.E.M./Aptio CRB, BIOS 5.6.5 07/08/2015 [ 916.338773] RIP: 0010:strlen+0x1a/0x90 [ 916.342781] RSP: 0018:ffff88010ff0f2f8 EFLAGS: 00010292 [ 916.346773] RAX: dffffc0000000000 RBX: ffff880119b26ee8 RCX: ffff88010c150038 [ 916.354777] RDX: 0000000000000002 RSI: ffff880119b26ee8 RDI: 0000000000000010 [ 916.362773] RBP: 0000000000000010 R08: 0000000000007e88 R09: ffff88010c15003c [ 916.370773] R10: ffff88010c150037 R11: ffffed002182a007 R12: ffff88010ff04040 [ 916.378779] R13: 0000000000000010 R14: ffff880119b26f30 R15: ffff88010ff04110 [ 916.387265] FS: 00007f57a1997700(0000) GS:ffff88011b800000(0000) knlGS:0000000000000000 [ 916.394785] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 916.402778] CR2: 00007f57a0ac80f0 CR3: 000000010ff02000 CR4: 00000000001006e0 [ 916.410772] Call Trace: [ 916.414787] nft_ct_helper_obj_dump+0x94/0x200 [nft_ct] [ 916.418779] ? nft_ct_set_eval+0x560/0x560 [nft_ct] [ 916.426771] ? memset+0x1f/0x40 [ 916.426771] ? __nla_reserve+0x92/0xb0 [ 916.434774] ? memcpy+0x34/0x50 [ 916.434774] nf_tables_fill_obj_info+0x484/0x860 [nf_tables] [ 916.442773] ? __nft_release_basechain+0x600/0x600 [nf_tables] [ 916.450779] ? lock_acquire+0x193/0x380 [ 916.454771] ? lock_acquire+0x193/0x380 [ 916.458789] ? nf_tables_dump_obj+0x148/0xcb0 [nf_tables] [ 916.462777] nf_tables_dump_obj+0x5f0/0xcb0 [nf_tables] [ 916.470769] ? __alloc_skb+0x30b/0x500 [ 916.474779] netlink_dump+0x752/0xb50 [ 916.478775] __netlink_dump_start+0x4d3/0x750 [ 916.482784] nf_tables_getobj+0x27a/0x930 [nf_tables] [ 916.490774] ? nft_obj_notify+0x100/0x100 [nf_tables] [ 916.494772] ? nf_tables_getobj+0x930/0x930 [nf_tables] [ 916.502579] ? nf_tables_dump_flowtable_done+0x70/0x70 [nf_tables] [ 916.506774] ? nft_obj_notify+0x100/0x100 [nf_tables] [ 916.514808] nfnetlink_rcv_msg+0x8ab/0xa86 [nfnetlink] [ 916.518771] ? nfnetlink_rcv_msg+0x550/0xa86 [nfnetlink] [ 916.526782] netlink_rcv_skb+0x23e/0x360 [ 916.530773] ? nfnetlink_bind+0x200/0x200 [nfnetlink] [ 916.534778] ? debug_check_no_locks_freed+0x280/0x280 [ 916.542770] ? netlink_ack+0x870/0x870 [ 916.546786] ? ns_capable_common+0xf4/0x130 [ 916.550765] nfnetlink_rcv+0x172/0x16c0 [nfnetlink] [ 916.554771] ? sched_clock_local+0xe2/0x150 [ 916.558774] ? sched_clock_cpu+0x144/0x180 [ 916.566575] ? lock_acquire+0x380/0x380 [ 916.570775] ? sched_clock_local+0xe2/0x150 [ 916.574765] ? nfnetlink_net_init+0x130/0x130 [nfnetlink] [ 916.578763] ? sched_clock_cpu+0x144/0x180 [ 916.582770] ? lock_acquire+0x193/0x380 [ 916.590771] ? lock_acquire+0x193/0x380 [ 916.594766] ? lock_acquire+0x380/0x380 [ 916.598760] ? netlink_deliver_tap+0x262/0xa60 [ 916.602766] ? lock_acquire+0x193/0x380 [ 916.606766] netlink_unicast+0x3ef/0x5a0 [ 916.610771] ? netlink_attachskb+0x630/0x630 [ 916.614763] netlink_sendmsg+0x72a/0xb00 [ 916.618769] ? netlink_unicast+0x5a0/0x5a0 [ 916.626766] ? _copy_from_user+0x92/0xc0 [ 916.630773] __sys_sendto+0x202/0x300 [ 916.634772] ? __ia32_sys_getpeername+0xb0/0xb0 [ 916.638759] ? lock_acquire+0x380/0x380 [ 916.642769] ? lock_acquire+0x193/0x380 [ 916.646761] ? finish_task_switch+0xf4/0x560 [ 916.650763] ? __schedule+0x582/0x19a0 [ 916.655301] ? __sched_text_start+0x8/0x8 [ 916.655301] ? up_read+0x1c/0x110 [ 916.655301] ? __do_page_fault+0x48b/0xaa0 [ 916.655301] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 916.655301] __x64_sys_sendto+0xdd/0x1b0 [ 916.655301] do_syscall_64+0x96/0x3d0 [ 916.655301] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 916.655301] RIP: 0033:0x7f57a0ff5e03 [ 916.655301] RSP: 002b:00007fff6367e0a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 916.655301] RAX: ffffffffffffffda RBX: 00007fff6367f1e0 RCX: 00007f57a0ff5e03 [ 916.655301] RDX: 0000000000000020 RSI: 00007fff6367e110 RDI: 0000000000000003 [ 916.655301] RBP: 00007fff6367e100 R08: 00007f57a0ce9160 R09: 000000000000000c [ 916.655301] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff6367e110 [ 916.655301] R13: 0000000000000020 R14: 00007f57a153c610 R15: 0000562417258de0 [ 916.655301] Code: ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 fa 53 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df 48 89 fd 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f [ 916.655301] RIP: strlen+0x1a/0x90 RSP: ffff88010ff0f2f8 [ 916.771929] ---[ end trace 1065e048e72479fe ]--- [ 916.777204] Kernel panic - not syncing: Fatal exception [ 916.778158] Kernel Offset: 0x14000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) Signed-off-by: Taehee Yoo <ap420073@gmail.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Hello,
I've been compiling and installing a new kernel from source (branch odroidxu3-3.10.y) in order to access the perf hardware events. Hopefully I could find a patch for it here patelhardik@e90ac2c.
It looks like this actually works, do you know why this has not been merged?
Sincerely.
edit: This only works for A15 hardware counters, but I guess it's better than none at all. I you know how to read both A7 and A15 counters without compiling again, please let me know.
The text was updated successfully, but these errors were encountered: