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Use msleep() instead of mtx_exit()/tsleep() so that we release the lock and

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go to sleep as an "atomic" operation.
This commit is contained in:
John Baldwin 2000-12-01 03:43:33 +00:00
parent 472fd56ea5
commit 2191340786
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=69436
2 changed files with 14 additions and 26 deletions
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20
sys/kern/vfs_export.c
View file

@ -281,19 +281,13 @@ vfs_busy(mp, flags, interlkp, p)
if (flags & LK_NOWAIT)
return (ENOENT);
mp->mnt_kern_flag |= MNTK_MWAIT;
if (interlkp) {
mtx_exit(interlkp, MTX_DEF);
}
/*
* Since all busy locks are shared except the exclusive
* lock granted when unmounting, the only place that a
* wakeup needs to be done is at the release of the
* exclusive lock at the end of dounmount.
*/
tsleep((caddr_t)mp, PVFS, "vfs_busy", 0);
if (interlkp) {
mtx_enter(interlkp, MTX_DEF);
}
msleep((caddr_t)mp, interlkp, PVFS, "vfs_busy", 0);
return (ENOENT);
}
lkflags = LK_SHARED | LK_NOPAUSE;
@ -1442,8 +1436,8 @@ vget(vp, flags, p)
printf("VXLOCK interlock avoided\n");
} else {
vp->v_flag |= VXWANT;
mtx_exit(&vp->v_interlock, MTX_DEF);
tsleep((caddr_t)vp, PINOD, "vget", 0);
msleep((caddr_t)vp, &vp->v_interlock, PINOD | PDROP,
"vget", 0);
return (ENOENT);
}
}
@ -1842,8 +1836,8 @@ vop_revoke(ap)
*/
if (vp->v_flag & VXLOCK) {
vp->v_flag |= VXWANT;
mtx_exit(&vp->v_interlock, MTX_DEF);
tsleep((caddr_t)vp, PINOD, "vop_revokeall", 0);
msleep((caddr_t)vp, &vp->v_interlock, PINOD | PDROP,
"vop_revokeall", 0);
return (0);
}
dev = vp->v_rdev;
@ -1911,8 +1905,8 @@ vgonel(vp, p)
*/
if (vp->v_flag & VXLOCK) {
vp->v_flag |= VXWANT;
mtx_exit(&vp->v_interlock, MTX_DEF);
tsleep((caddr_t)vp, PINOD, "vgone", 0);
msleep((caddr_t)vp, &vp->v_interlock, PINOD | PDROP,
"vgone", 0);
return;
}

20
sys/kern/vfs_subr.c
View file

@ -281,19 +281,13 @@ vfs_busy(mp, flags, interlkp, p)
if (flags & LK_NOWAIT)
return (ENOENT);
mp->mnt_kern_flag |= MNTK_MWAIT;
if (interlkp) {
mtx_exit(interlkp, MTX_DEF);
}
/*
* Since all busy locks are shared except the exclusive
* lock granted when unmounting, the only place that a
* wakeup needs to be done is at the release of the
* exclusive lock at the end of dounmount.
*/
tsleep((caddr_t)mp, PVFS, "vfs_busy", 0);
if (interlkp) {
mtx_enter(interlkp, MTX_DEF);
}
msleep((caddr_t)mp, interlkp, PVFS, "vfs_busy", 0);
return (ENOENT);
}
lkflags = LK_SHARED | LK_NOPAUSE;
@ -1442,8 +1436,8 @@ vget(vp, flags, p)
printf("VXLOCK interlock avoided\n");
} else {
vp->v_flag |= VXWANT;
mtx_exit(&vp->v_interlock, MTX_DEF);
tsleep((caddr_t)vp, PINOD, "vget", 0);
msleep((caddr_t)vp, &vp->v_interlock, PINOD | PDROP,
"vget", 0);
return (ENOENT);
}
}
@ -1842,8 +1836,8 @@ vop_revoke(ap)
*/
if (vp->v_flag & VXLOCK) {
vp->v_flag |= VXWANT;
mtx_exit(&vp->v_interlock, MTX_DEF);
tsleep((caddr_t)vp, PINOD, "vop_revokeall", 0);
msleep((caddr_t)vp, &vp->v_interlock, PINOD | PDROP,
"vop_revokeall", 0);
return (0);
}
dev = vp->v_rdev;
@ -1911,8 +1905,8 @@ vgonel(vp, p)
*/
if (vp->v_flag & VXLOCK) {
vp->v_flag |= VXWANT;
mtx_exit(&vp->v_interlock, MTX_DEF);
tsleep((caddr_t)vp, PINOD, "vgone", 0);
msleep((caddr_t)vp, &vp->v_interlock, PINOD | PDROP,
"vgone", 0);
return;
}