https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279138
Bug ID: 279138
Summary: NFS and NFSUPG and BUFWAIT
Product: Base System
Version: 15.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: dgilb...@eicat.ca
Setup:
host: 14.0p2, 1900 threadripper (16 threads), 128G ram, 120T zfs
vm: 15.0-CURRENT #5 main-n270190-75529910f77a: Thu May 16 19:08:46 EDT 2024
64G ram, 15 processors, 200G ZFS (zvol on host).
Host runs poudreiere for <=14. VM runs 15 poudriere (not at same time). VM
mounts /usr/local/poudriere via NFS.
Multiple times, with at least one make-world on a new pull inbetween, the whole
things stopps (it didn't used to, 2 to 3 months ago code). Seems to happen
when this triple reversal happens:
May 17 12:16:24 curpoud kernel: lock order reversal:
May 17 12:16:24 curpoud kernel: 1st 0xfffff802dcae0230 nfs (nfs, lockmgr) @
/usr/src/sys/kern/vfs_subr.c:3298
May 17 12:16:24 curpoud kernel: 2nd 0xfffffe006a1633c8 bufwait (bufwait,
lockmgr) @ /usr/src/sys/kern/vfs_subr.c:2442
May 17 12:16:24 curpoud kernel: lock order bufwait -> nfs established at:
May 17 12:16:24 curpoud kernel: #0 0xffffffff80bb5ca5 at
witness_checkorder+0x315
May 17 12:16:24 curpoud kernel: #1 0xffffffff80b0e962 at
lockmgr_lock_flags+0x172
May 17 12:16:24 curpoud kernel: #2 0xffffffff80a1990c at nfs_lock+0x2c
May 17 12:16:24 curpoud kernel: #3 0xffffffff80c25f50 at vop_sigdefer+0x30
May 17 12:16:24 curpoud kernel: #4 0xffffffff80c52783 at _vn_lock+0x53
May 17 12:16:24 curpoud kernel: #5 0xffffffff80c3a22d at vget_finish+0x4d
May 17 12:16:24 curpoud kernel: #6 0xffffffff80c28b91 at vfs_hash_get+0xd1
May 17 12:16:24 curpoud kernel: #7 0xffffffff80a2293b at nfscl_nget+0x13b
May 17 12:16:24 curpoud kernel: #8 0xffffffff80a0a2d8 at
nfsrpc_readdirplus+0xa98
May 17 12:16:24 curpoud kernel: #9 0xffffffff80a150a0 at
ncl_readdirplusrpc+0xf0
May 17 12:16:24 curpoud kernel: #10 0xffffffff80a26cbc at ncl_doio+0x47c
May 17 12:16:24 curpoud kernel: #11 0xffffffff80a25e5f at ncl_bioread+0x5ef
May 17 12:16:24 curpoud kernel: #12 0xffffffff80a19858 at nfs_readdir+0x1d8
May 17 12:16:24 curpoud kernel: #13 0xffffffff80c25f50 at vop_sigdefer+0x30
May 17 12:16:24 curpoud kernel: #14 0xffffffff811274a2 at VOP_READDIR_APV+0x32
May 17 12:16:24 curpoud kernel: #15 0xffffffff80c4f05e at
kern_getdirentries+0x1ce
May 17 12:16:24 curpoud kernel: #16 0xffffffff80c4f459 at
sys_getdirentries+0x29
May 17 12:16:24 curpoud kernel: #17 0xffffffff8105f638 at amd64_syscall+0x158
May 17 12:16:24 curpoud kernel: lock order nfs -> bufwait attempted at:
May 17 12:16:24 curpoud kernel: #0 0xffffffff80bb650b at
witness_checkorder+0xb7b
May 17 12:16:24 curpoud kernel: #1 0xffffffff80b0f06e at
lockmgr_xlock_hard+0x6e
May 17 12:16:24 curpoud kernel: #2 0xffffffff80b0f910 at __lockmgr_args+0x1e0
May 17 12:16:24 curpoud kernel: #3 0xffffffff80c388e0 at flushbuflist+0x110
May 17 12:16:24 curpoud kernel: #4 0xffffffff80c3859a at bufobj_invalbuf+0x8a
May 17 12:16:24 curpoud kernel: #5 0xffffffff80a26f20 at ncl_vinvalbuf+0xf0
May 17 12:16:24 curpoud kernel: #6 0xffffffff80a17125 at nfs_open+0x1d5
May 17 12:16:24 curpoud kernel: #7 0xffffffff80c25f50 at vop_sigdefer+0x30
May 17 12:16:24 curpoud kernel: #8 0xffffffff811253cf at VOP_OPEN_APV+0x2f
May 17 12:16:24 curpoud kernel: #9 0xffffffff80c52579 at vn_open_vnode+0x1b9
May 17 12:16:24 curpoud kernel: #10 0xffffffff80c51f78 at vn_open_cred+0x598
May 17 12:16:24 curpoud kernel: #11 0xffffffff80c48267 at openatfp+0x287
May 17 12:16:24 curpoud kernel: #12 0xffffffff80c47fbd at sys_openat+0x3d
May 17 12:16:24 curpoud kernel: #13 0xffffffff8105f638 at amd64_syscall+0x158
May 17 12:16:24 curpoud kernel: #14 0xffffffff81030cdb at
fast_syscall_common+0xf8
May 17 12:16:24 curpoud kernel: lock order reversal:
May 17 12:16:24 curpoud kernel: 1st 0xfffffe01c4ec9e60 nfsupg (nfsupg,
lockmgr) @ /usr/src/sys/fs/nfsclient/nfs_clsubs.c:151
May 17 12:16:24 curpoud kernel: 2nd 0xfffffe006a174e88 bufwait (bufwait,
lockmgr) @ /usr/src/sys/kern/vfs_subr.c:2442
May 17 12:16:24 curpoud kernel: lock order nfsupg -> bufwait attempted at:
May 17 12:16:24 curpoud kernel: #0 0xffffffff80bb650b at
witness_checkorder+0xb7b
May 17 12:16:24 curpoud kernel: #1 0xffffffff80b0f06e at
lockmgr_xlock_hard+0x6e
May 17 12:16:24 curpoud kernel: #2 0xffffffff80b0f910 at __lockmgr_args+0x1e0
May 17 12:16:24 curpoud kernel: #3 0xffffffff80c388e0 at flushbuflist+0x110
May 17 12:16:24 curpoud kernel: #4 0xffffffff80c3859a at bufobj_invalbuf+0x8a
May 17 12:16:24 curpoud kernel: #5 0xffffffff80a26f20 at ncl_vinvalbuf+0xf0
May 17 12:16:24 curpoud kernel: #6 0xffffffff80a25bc8 at ncl_bioread+0x358
May 17 12:16:24 curpoud kernel: #7 0xffffffff80a19858 at nfs_readdir+0x1d8
May 17 12:16:24 curpoud kernel: #8 0xffffffff80c25f50 at vop_sigdefer+0x30
May 17 12:16:24 curpoud kernel: #9 0xffffffff811274a2 at VOP_READDIR_APV+0x32
May 17 12:16:24 curpoud kernel: #10 0xffffffff80c4f05e at
kern_getdirentries+0x1ce
May 17 12:16:24 curpoud kernel: #11 0xffffffff80c4f459 at
sys_getdirentries+0x29
May 17 12:16:24 curpoud kernel: #12 0xffffffff8105f638 at amd64_syscall+0x158
May 17 12:16:24 curpoud kernel: #13 0xffffffff81030cdb at
fast_syscall_common+0xf8
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