src/sys/netsmb, branch releng/7.3

Silence this module.

2009-08-13T08:31:15Z

MFC ver. 1.20:

2008-05-16T19:44:50Z

Currently, smb_co_init() uses the same lock name for the mutex interlock and the lockmgr. Use different names in order to avoid WITNESS conflicts.

MFC:

2008-05-05T15:58:44Z

Use LOCK_FILE and LOCK_LINE with lockmgr(), add the wrapper protecting for the public namespace for userland inclusion. Now lockmgr depends by sys/lock.h header on RELENG_7 too.

MFC rev. 1.21:

2008-03-29T23:00:29Z

Drop Giant lock before to destroy the kthread.

Merge smb_conn.h:1.13 from HEAD to RELENG_7:

2008-03-13T10:29:35Z

Remove unused vc_tnode field from struct smb_vc.

Fixing the mount_smbfs(8) hanging by utilising the destroy_dev_sched() KPI.

2007-07-10T09:23:10Z

Relevant threads: http://lists.freebsd.org/pipermail/freebsd-current/2007-June/074329.html Reviewed by: kib, bp (slightly different version) Tested by: Yuri Pankov , Jiawei Ye Approved by: re (kensmith)

Initialize some variables that GCC4.2 thinks might possibly be used without

2007-06-15T23:49:54Z

being initialized.

Commit 14/14 of sched_lock decomposition.

2007-06-05T00:00:57Z

- Use thread_lock() rather than sched_lock for per-thread scheduling sychronization. - Use the per-process spinlock rather than the sched_lock for per-process scheduling synchronization. Tested by: kris, current@ Tested on: i386, amd64, ULE, 4BSD, libthr, libkse, PREEMPTION, etc. Discussed with: kris, attilio, kmacy, jhb, julian, bde (small parts each)

Replace custom file descriptor array sleep lock constructed using a mutex

2007-04-04T09:11:34Z

and flags with an sxlock. This leads to a significant and measurable performance improvement as a result of access to shared locking for frequent lookup operations, reduced general overhead, and reduced overhead in the event of contention. All of these are imported for threaded applications where simultaneous access to a shared file descriptor array occurs frequently. Kris has reported 2x-4x transaction rate improvements on 8-core MySQL benchmarks; smaller improvements can be expected for many workloads as a result of reduced overhead. - Generally eliminate the distinction between "fast" and regular acquisisition of the filedesc lock; the plan is that they will now all be fast. Change all locking instances to either shared or exclusive locks. - Correct a bug (pointed out by kib) in fdfree() where previously msleep() was called without the mutex held; sx_sleep() is now always called with the sxlock held exclusively. - Universally hold the struct file lock over changes to struct file, rather than the filedesc lock or no lock. Always update the f_ops field last. A further memory barrier is required here in the future (discussed with jhb). - Improve locking and reference management in linux_at(), which fails to properly acquire vnode references before using vnode pointers. Annotate improper use of vn_fullpath(), which will be replaced at a future date. In fcntl(), we conservatively acquire an exclusive lock, even though in some cases a shared lock may be sufficient, which should be revisited. The dropping of the filedesc lock in fdgrowtable() is no longer required as the sxlock can be held over the sleep operation; we should consider removing that (pointed out by attilio). Tested by: kris Discussed with: jhb, kris, attilio, jeff

Backing out the wrong fix which could possibly trash the memory if devfs

2007-02-09T17:22:10Z

tries to drop the reference count after our close routine returns. A more correct fix is to defer the destroy_dev() to a taskqueue(either in devfs or locally). Reminded by: jhb