aboutsummaryrefslogtreecommitdiffstats
path: root/fs/dlm/user.c
diff options
context:
space:
mode:
authorDavid Teigland <teigland@redhat.com>2009-11-30 16:34:43 -0600
committerDavid Teigland <teigland@redhat.com>2009-11-30 16:34:43 -0600
commit573c24c4af6664ffcd9aa7ba617a35fde2b95534 (patch)
tree9222c0c8921fda5b842c2d1007d911d47bd4fe7c /fs/dlm/user.c
parenta8a8a669ea13d792296737505adc43ccacf3a648 (diff)
dlm: always use GFP_NOFS
Replace all GFP_KERNEL and ls_allocation with GFP_NOFS. ls_allocation would be GFP_KERNEL for userland lockspaces and GFP_NOFS for file system lockspaces. It was discovered that any lockspaces on the system can affect all others by triggering memory reclaim in the file system which could in turn call back into the dlm to acquire locks, deadlocking dlm threads that were shared by all lockspaces, like dlm_recv. Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/user.c')
-rw-r--r--fs/dlm/user.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index ebce994ab0b..e73a4bb572a 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -267,7 +267,7 @@ static int device_user_lock(struct dlm_user_proc *proc,
goto out;
}
- ua = kzalloc(sizeof(struct dlm_user_args), GFP_KERNEL);
+ ua = kzalloc(sizeof(struct dlm_user_args), GFP_NOFS);
if (!ua)
goto out;
ua->proc = proc;
@@ -307,7 +307,7 @@ static int device_user_unlock(struct dlm_user_proc *proc,
if (!ls)
return -ENOENT;
- ua = kzalloc(sizeof(struct dlm_user_args), GFP_KERNEL);
+ ua = kzalloc(sizeof(struct dlm_user_args), GFP_NOFS);
if (!ua)
goto out;
ua->proc = proc;
@@ -352,7 +352,7 @@ static int dlm_device_register(struct dlm_ls *ls, char *name)
error = -ENOMEM;
len = strlen(name) + strlen(name_prefix) + 2;
- ls->ls_device.name = kzalloc(len, GFP_KERNEL);
+ ls->ls_device.name = kzalloc(len, GFP_NOFS);
if (!ls->ls_device.name)
goto fail;
@@ -520,7 +520,7 @@ static ssize_t device_write(struct file *file, const char __user *buf,
#endif
return -EINVAL;
- kbuf = kzalloc(count + 1, GFP_KERNEL);
+ kbuf = kzalloc(count + 1, GFP_NOFS);
if (!kbuf)
return -ENOMEM;
@@ -546,7 +546,7 @@ static ssize_t device_write(struct file *file, const char __user *buf,
/* add 1 after namelen so that the name string is terminated */
kbuf = kzalloc(sizeof(struct dlm_write_request) + namelen + 1,
- GFP_KERNEL);
+ GFP_NOFS);
if (!kbuf) {
kfree(k32buf);
return -ENOMEM;
@@ -648,7 +648,7 @@ static int device_open(struct inode *inode, struct file *file)
if (!ls)
return -ENOENT;
- proc = kzalloc(sizeof(struct dlm_user_proc), GFP_KERNEL);
+ proc = kzalloc(sizeof(struct dlm_user_proc), GFP_NOFS);
if (!proc) {
dlm_put_lockspace(ls);
return -ENOMEM;