vfs_vnode Assertion failure in SPECjvm2008's compiler.sunflow

[nyh]

When running the compiler.sunflow benchmark, I saw the following crash:

Assertion failed: vp->v_refcnt > 0 (/data/nyh/osv/fs/vfs/vfs_vnode.c: vn_lock: 127127)

The stack trace:

#4  0x00000000003ec5de in __assert_fail (
    expr=expr@entry=0x6532f1 "vp->v_refcnt > 0", 
    file=file@entry=0x6532d0 "/data/nyh/osv/fs/vfs/vfs_vnode.c", 
    line=line@entry=127, func=func@entry=0x653392 <__func__.3851> "vn_lock")
    at /data/nyh/osv/libc/exit/assert.c:7
#5  0x0000000000205f4b in vn_lock (vp=0xffffc000078d6180)
    at /data/nyh/osv/fs/vfs/vfs_vnode.c:127
#6  0x00000000003e4eba in vn_lock (vp=vp@entry=0xffffc000078d6180)
    at /data/nyh/osv/fs/vfs/vfs_vnode.c:126
#7  0x00000000003e360b in namei (path=<optimized out>, dpp=0x200008795530)
    at /data/nyh/osv/fs/vfs/vfs_lookup.c:219
#8  0x00000000003e6df5 in sys_stat (path=<optimized out>, st=0x2000087965c0)
    at /data/nyh/osv/fs/vfs/vfs_syscalls.cc:875
#9  0x00000000003dde1e in __xstat (ver=<optimized out>, 
    pathname=<optimized out>, st=0x2000087965c0)
    at /data/nyh/osv/fs/vfs/main.cc:839
#10 0x0000100001a1ae75 in Java_java_io_UnixFileSystem_getBooleanAttributes0 ()
#11 0x00002000008d12bb in ?? ()
#12 0x00000000979a93c8 in ?? ()
#13 0x00000000e8284618 in ?? ()
#14 0x000000008db01370 in ?? ()
#15 0x0000000000000000 in ?? ()

[nyh]

I just verified, I'm still seeing this crash on the lastest master. This time it crashed the compiler.compiler benchmark, with the same stack trace (same assertion failed, called from __xstat).

This crash is not happening every time, but does happen quite frequently, in one out of every few runs.

By the way, to build and run the compiler.compiler benchmark like I did, use the following command:

make image=specjvm
scripts/run.py -m2G -c2 -e "java.so -Xmx1400m -Xms1400m -jar specjvm.jar -ikv -bt 2 compiler.sunflow"

[raphaelsc]

Should it be closed? I think this issue doesn't exist anymore.

[nyh]

I can't reproduce this bug on the latest master. So I'm closing the issue.