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Add bwillwrite to all system calls that create things in the filesystem.

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Benchmarks that create huge trees of empty files overwhelm the buffer cache.
This commit is contained in:
Kirk McKusick 2000-01-10 00:08:53 +00:00
parent 411e1480fd
commit bd5f5da94d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=55696
3 changed files with 19 additions and 0 deletions
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9
sys/kern/vfs_extattr.c
View File

@ -1111,6 +1111,7 @@ mknod(p, uap)
}
if (error)
return (error);
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
@ -1189,6 +1190,7 @@ mkfifo(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
@ -1235,6 +1237,7 @@ link(p, uap)
struct nameidata nd;
int error;
bwillwrite();
NDINIT(&nd, LOOKUP, FOLLOW|NOOBJ, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
@ -1295,6 +1298,7 @@ symlink(p, uap)
path = zalloc(namei_zone);
if ((error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL)) != 0)
goto out;
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
if ((error = namei(&nd)) != 0)
goto out;
@ -1337,6 +1341,7 @@ undelete(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
SCARG(uap, path), p);
error = namei(&nd);
@ -1383,6 +1388,7 @@ unlink(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
@ -2569,6 +2575,7 @@ rename(p, uap)
struct nameidata fromnd, tond;
int error;
bwillwrite();
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
SCARG(uap, from), p);
if ((error = namei(&fromnd)) != 0)
@ -2671,6 +2678,7 @@ mkdir(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
nd.ni_cnd.cn_flags |= WILLBEDIR;
if ((error = namei(&nd)) != 0)
@ -2719,6 +2727,7 @@ rmdir(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)

9
sys/kern/vfs_syscalls.c
View File

@ -1111,6 +1111,7 @@ mknod(p, uap)
}
if (error)
return (error);
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
@ -1189,6 +1190,7 @@ mkfifo(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
@ -1235,6 +1237,7 @@ link(p, uap)
struct nameidata nd;
int error;
bwillwrite();
NDINIT(&nd, LOOKUP, FOLLOW|NOOBJ, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
@ -1295,6 +1298,7 @@ symlink(p, uap)
path = zalloc(namei_zone);
if ((error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL)) != 0)
goto out;
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
if ((error = namei(&nd)) != 0)
goto out;
@ -1337,6 +1341,7 @@ undelete(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
SCARG(uap, path), p);
error = namei(&nd);
@ -1383,6 +1388,7 @@ unlink(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
@ -2569,6 +2575,7 @@ rename(p, uap)
struct nameidata fromnd, tond;
int error;
bwillwrite();
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
SCARG(uap, from), p);
if ((error = namei(&fromnd)) != 0)
@ -2671,6 +2678,7 @@ mkdir(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
nd.ni_cnd.cn_flags |= WILLBEDIR;
if ((error = namei(&nd)) != 0)
@ -2719,6 +2727,7 @@ rmdir(p, uap)
int error;
struct nameidata nd;
bwillwrite();
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)

1
sys/kern/vfs_vnops.c
View File

@ -92,6 +92,7 @@ vn_open(ndp, fmode, cmode)
ndp->ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF;
if ((fmode & O_EXCL) == 0 && (fmode & O_NOFOLLOW) == 0)
ndp->ni_cnd.cn_flags |= FOLLOW;
bwillwrite();
error = namei(ndp);
if (error)
return (error);