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freebsd-dev/sys/ufs/ffs
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Konstantin Belousov 6c21f6edb8 The VOP_LOOKUP() implementations for CREATE op do not put the name 
into namecache, to avoid cache trashing when doing large operations.
E.g., tar archive extraction is not usually followed by access to many
of the files created.

Right now, each VOP_LOOKUP() implementation explicitely knowns about
this quirk and tests for both MAKEENTRY flag presence and op != CREATE
to make the call to cache_enter().  Centralize the handling of the
quirk into VFS, by deciding to cache only by MAKEENTRY flag in VOP.
VFS now sets NOCACHE flag for CREATE namei() calls.

Note that the change in semantic is backward-compatible and could be
merged to the stable branch, and is compatible with non-changed
third-party filesystems which correctly handle MAKEENTRY.

Suggested by:	Chris Torek <torek@pi-coral.com>
Reviewed by:	mckusick
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2014-12-18 10:01:12 +00:00
..
ffs_alloc.c Adjust printf format specifiers for dev_t and ino_t in kernel. 2014-12-17 07:27:19 +00:00
ffs_balloc.c ufs: small formatting fixes. 2014-03-02 02:52:34 +00:00
ffs_extern.h ufs: small formatting fixes. 2014-03-02 02:52:34 +00:00
ffs_inode.c - Convert the bufobj lock to rwlock. 2013-05-31 00:43:41 +00:00
ffs_rawread.c Initialize the pbuf counter for directio using SYSINIT, instead of 2014-06-08 10:55:06 +00:00
ffs_snapshot.c The VOP_LOOKUP() implementations for CREATE op do not put the name 2014-12-18 10:01:12 +00:00
ffs_softdep.c When non-forced unmount or remount rw->ro is performed, writes on UFS 2014-11-02 13:14:55 +00:00
ffs_subr.c
ffs_suspend.c Include required files directly instead of pollution via ufs/ufsmount.h. 2014-11-23 01:01:14 +00:00
ffs_tables.c
ffs_vfsops.c Provide vfs suspension support only for filesystems which need it, take 2014-10-20 18:00:50 +00:00
ffs_vnops.c Merge from projects/sendfile: 2014-11-23 12:01:52 +00:00
fs.h ufs: small formatting fixes. 2014-03-02 02:52:34 +00:00
softdep.h Add support for multi-threading of soft updates. 2014-08-04 22:03:58 +00:00