Re: Panic: cache_vop_rename: lingering negative entry

Jan Martin Mikkelsen <[email protected]>
Newsgroups gmane.os.freebsd.current
Message-ID <[email protected]>
On 7 Apr 2026, at 18:53, Konstantin Belousov <[email protected]> wrote:
> 
> On Tue, Apr 07, 2026 at 05:02:05PM +0200, Jan Martin Mikkelsen wrote:
>> Hi,
>> 
>> I am consistently getting the panic below while building lang/perl5.42. This is the command from the perl build that triggers the panic:
>> 
>> /usr/bin/strip /ports-work/usr/ports/lang/perl5.42/work/stage/usr/local/bin/perl5.42.0
>> 
>> CURRENT on aarch64, with a kernel from last week, also with a later one from the  weekend. A kernel from mid-January worked fine.
>> 
>> I can reproduce on demand, no parallelism in the build required.
>> 
>> Does this look familiar to anyone?
>> 
>> panic: cache_vop_rename: lingering negative entry
>> cpuid = 4
>> time = 1775410763
>> KDB: stack backtrace:
>> db_trace_self() at db_trace_self
>> db_trace_self_wrapper() at db_trace_self_wrapper+0x38
>> vpanic() at vpanic+0x1a0
>> panic() at panic+0x48
>> cache_vop_rename() at cache_vop_rename+0xb0
>> zfs_do_rename() at zfs_do_rename+0xafc
>> zfs_freebsd_rename() at zfs_freebsd_rename+0x5c
>> VOP_RENAME_APV() at VOP_RENAME_APV+0x44
>> kern_renameat () at kern_renameat+0x574
>> do_el0_sync() at do_el0_sync+0x5f8
>> handle_el0_sync() at handle_el0_sync+0x4c
>> --- exception, esr 0x56000000
>> KDB: enter: panic
>> [ thread pid 81230 tid 101738 ]
>> Stopped at kdb_enter+0x48: str xzr, [x19, #3072]
> 
> Is it reproducable on UFS and/or tmpfs?

Successful completion (no panic) when the work directory is on UFS, and when the work directory is on tmpfs. I didn’t try multiple times, but it never works on ZFS.

Regards,

Jan M.
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