Module Name: src
Committed By: hannken
Date: Tue Apr 15 09:50:45 UTC 2014
Modified Files:
src/sys/kern: vfs_trans.c
Log Message:
Fix a deadlock where one thread exits, enters fstrans_lwp_dtor()
and wants fstrans_lock. This thread holds the proc_lock.
Another thread holds fstrans_lock and runs pserialize_perform().
As the first thread holds the proc_lock, timeouts are blocked and
the second thread blocks forever in kpause().
Change fstrans_lwp_dtor() to invalidate, but not free its info
structs. No need to take fstrans_lock.
Change fstrans_get_lwp_info() to reuse invalidated info before
trying to allocate a new one.
To generate a diff of this commit:
cvs rdiff -u -r1.29 -r1.30 src/sys/kern/vfs_trans.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
