xnu-201.5.tar.gz

[apple/xnu.git] / bsd / miscfs / devfs / devfs_tree.c

diff --git a/bsd/miscfs/devfs/devfs_tree.c b/bsd/miscfs/devfs/devfs_tree.c
index 8a335534a9dfa34629c20972854498c30d4d2e5f..60e1c09782756a415ec2751939168ba83bbd689c 100644 (file)
--- a/bsd/miscfs/devfs/devfs_tree.c
+++ b/bsd/miscfs/devfs/devfs_tree.c
@@ -126,6 +126,11 @@ devfs_sinit(void)
        MALLOC(devfs_hidden_mount, struct mount *, sizeof(struct mount),
               M_MOUNT, M_WAITOK);
        bzero(devfs_hidden_mount,sizeof(struct mount));
        MALLOC(devfs_hidden_mount, struct mount *, sizeof(struct mount),
               M_MOUNT, M_WAITOK);
        bzero(devfs_hidden_mount,sizeof(struct mount));

+
+    /* Initialize the default IO constraints */
+    mp->mnt_maxreadcnt = mp->mnt_maxwritecnt = MAXPHYS;
+    mp->mnt_segreadcnt = mp->mnt_segwritecnt = 32;
+

        devfs_mount(devfs_hidden_mount,"dummy",NULL,NULL,NULL);
        dev_root->de_dnp->dn_dvm 
            = (struct devfsmount *)devfs_hidden_mount->mnt_data;
        devfs_mount(devfs_hidden_mount,"dummy",NULL,NULL,NULL);
        dev_root->de_dnp->dn_dvm 
            = (struct devfsmount *)devfs_hidden_mount->mnt_data;