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dlm: always use GFP_NOFS

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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>
This commit is contained in:
David Teigland
2009-11-30 16:34:43 -06:00
parent a8a8a669ea
commit 573c24c4af
14 changed files with 46 additions and 53 deletions
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24
fs/dlm/config.c
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@@ -410,10 +410,10 @@ static struct config_group *make_cluster(struct config_group *g,
struct dlm_comms *cms = NULL;
void *gps = NULL;
cl = kzalloc(sizeof(struct dlm_cluster), GFP_KERNEL);
gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
sps = kzalloc(sizeof(struct dlm_spaces), GFP_KERNEL);
cms = kzalloc(sizeof(struct dlm_comms), GFP_KERNEL);
cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
gps = kcalloc(3, sizeof(struct config_group *), GFP_NOFS);
sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
if (!cl || !gps || !sps || !cms)
goto fail;
@@ -482,9 +482,9 @@ static struct config_group *make_space(struct config_group *g, const char *name)
struct dlm_nodes *nds = NULL;
void *gps = NULL;
sp = kzalloc(sizeof(struct dlm_space), GFP_KERNEL);
gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL);
nds = kzalloc(sizeof(struct dlm_nodes), GFP_KERNEL);
sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
gps = kcalloc(2, sizeof(struct config_group *), GFP_NOFS);
nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
if (!sp || !gps || !nds)
goto fail;
@@ -536,7 +536,7 @@ static struct config_item *make_comm(struct config_group *g, const char *name)
{
struct dlm_comm *cm;
cm = kzalloc(sizeof(struct dlm_comm), GFP_KERNEL);
cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS);
if (!cm)
return ERR_PTR(-ENOMEM);
@@ -569,7 +569,7 @@ static struct config_item *make_node(struct config_group *g, const char *name)
struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
struct dlm_node *nd;
nd = kzalloc(sizeof(struct dlm_node), GFP_KERNEL);
nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
if (!nd)
return ERR_PTR(-ENOMEM);
@@ -705,7 +705,7 @@ static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf, size_t len)
if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
return -ENOSPC;
addr = kzalloc(sizeof(*addr), GFP_KERNEL);
addr = kzalloc(sizeof(*addr), GFP_NOFS);
if (!addr)
return -ENOMEM;
@@ -868,7 +868,7 @@ int dlm_nodeid_list(char *lsname, int **ids_out, int *ids_count_out,
ids_count = sp->members_count;
ids = kcalloc(ids_count, sizeof(int), GFP_KERNEL);
ids = kcalloc(ids_count, sizeof(int), GFP_NOFS);
if (!ids) {
rv = -ENOMEM;
goto out;
@@ -886,7 +886,7 @@ int dlm_nodeid_list(char *lsname, int **ids_out, int *ids_count_out,
if (!new_count)
goto out_ids;
new = kcalloc(new_count, sizeof(int), GFP_KERNEL);
new = kcalloc(new_count, sizeof(int), GFP_NOFS);
if (!new) {
kfree(ids);
rv = -ENOMEM;