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| author | ups <ups@FreeBSD.org> | 2008-05-20 19:05:43 +0000 |
|---|---|---|
| committer | ups <ups@FreeBSD.org> | 2008-05-20 19:05:43 +0000 |
| commit | fbd329664f5e1e99035c0b473a42b33812b91466 (patch) | |
| tree | 122fb04f7bf2895af8ccd1d933a2cf8c59347db2 /sys/ufs | |
| parent | 8a663465644dd0d19159348afb69bb2462822ed1 (diff) | |
| download | FreeBSD-src-fbd329664f5e1e99035c0b473a42b33812b91466.zip FreeBSD-src-fbd329664f5e1e99035c0b473a42b33812b91466.tar.gz | |
Allow VM object creation in ufs_lookup. (If vfs.vmiodirenable is set)
Directory IO without a VM object will store data in 'malloced' buffers
severely limiting caching of the data. Without this change VM objects for
directories are only created on an open() of the directory.
TODO: Inline test if VM object already exists to avoid locking/function call
overhead.
Tested by: kris@
Reviewed by: jeff@
Reported by: David Filo
Diffstat (limited to 'sys/ufs')
| -rw-r--r-- | sys/ufs/ufs/ufs_lookup.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sys/ufs/ufs/ufs_lookup.c b/sys/ufs/ufs/ufs_lookup.c index 0a2f532..467f084 100644 --- a/sys/ufs/ufs/ufs_lookup.c +++ b/sys/ufs/ufs/ufs_lookup.c @@ -168,6 +168,16 @@ ufs_lookup(ap) vdp = ap->a_dvp; dp = VTOI(vdp); + + /* + * Create a vm object if vmiodirenable is enabled. + * Alternatively we could call vnode_create_vobject + * in VFS_VGET but we could end up creating objects + * that are never used. + */ + + vnode_create_vobject(vdp, DIP(dp, i_size), cnp->cn_thread); + /* * We now have a segment name to search for, and a directory to search. * |
