Rick Macklem a820822ec8 A problem with the old NFS client where large writes to large files ... would sometimes result in a corrupted file was reported via email. This problem appears to have been caused by r251719 (reverting r251719 fixed the problem). Although I have not been able to reproduce this problem, I suspect it is caused by another thread increasing np->n_size after the mtx_unlock(&np->n_mtx) but before the vnode_pager_setsize() call. Since the np->n_mtx mutex serializes updates to np->n_size, doing the vnode_pager_setsize() with the mutex locked appears to avoid the problem. Unfortunately, vnode_pager_setsize() where the new size is smaller, cannot be called with a mutex held. This patch returns the semantics to be close to pre-r251719 (actually pre-r248567, r248581, r248567 for the new client) such that the call to vnode_pager_setsize() is only delayed until after the mutex is unlocked when np->n_size is shrinking. Since the file is growing when being written, I believe this will fix the corruption. A better solution might be to replace the mutex with a sleep lock, but that is a non-trivial conversion, so this fix is hoped to be sufficient in the meantime. Reported by: David G. Lawrence (dg@dglawrence.com) Tested by: David G. Lawrence (to be done soon) Reviewed by: kib MFC after: 1 week		2013-07-03 00:19:03 +00:00
..
cd9660	Add currently unused flag argument to the cluster_read(),	2013-03-14 20:28:26 +00:00
deadfs	The deadfs VOPs for vop_ioctl and vop_bmap call itself recursively,	2012-09-13 13:05:45 +00:00
devfs	- Correct mispellings of the word necessary	2013-04-17 11:42:40 +00:00
ext2fs	ext2fs: Use the complete random() range in i_gen.	2013-06-30 00:42:51 +00:00
fdescfs	Fix several typos	2013-05-12 16:43:26 +00:00
fifofs	I am comparing current pipe code with the one in 8.3-STABLE r236165,	2012-07-31 05:48:35 +00:00
fuse	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
msdosfs	The fsync(2) call should sync the vnode in such way that even after	2013-05-02 20:00:11 +00:00
nandfs	- Convert the bufobj lock to rwlock.	2013-05-31 00:43:41 +00:00
nfs	Revamp the old NFS server's File Handle Affinity (FHA) code so that	2013-04-17 21:00:22 +00:00
nfsclient	A problem with the old NFS client where large writes to large files	2013-07-03 00:19:03 +00:00
nfsserver	- Convert the bufobj lock to rwlock.	2013-05-31 00:43:41 +00:00
nullfs	Do not leak the NULLV_NOUNLOCK flag from the nullfs_unlink_lowervp(),	2013-05-21 11:31:56 +00:00
procfs	Relax the vm object locking. Use a read lock.	2013-06-05 17:00:10 +00:00
pseudofs	Complete MPSAFE VFS interface and remove MNTK_MPSAFE flag.	2012-11-09 18:02:25 +00:00
smbfs	Properly use v_data field. This magically worked (even if wrong) until	2013-06-28 20:32:48 +00:00
tmpfs	Add missing VM object unlocks in an error case.	2013-06-07 19:42:00 +00:00
udf	Add currently unused flag argument to the cluster_read(),	2013-03-14 20:28:26 +00:00
unionfs	r16312 is not any longer real since many years (likely since when VFS	2012-11-19 22:43:45 +00:00