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authorSunil Mushran <sunil.mushran@oracle.com>2011-02-22 01:25:25 +0300
committerJoel Becker <jlbec@evilplan.org>2011-02-22 12:35:30 +0300
commit770c4d81e0d2ca45516ddc9ae0a69565790b5533 (patch)
tree8a7fed6cf0b3870efacfbbaeb47929edd438494b /fs/ocfs2
parent1936a267f1b5a32d4a846608fdcce82ca0f6ac8e (diff)
downloadlinux-770c4d81e0d2ca45516ddc9ae0a69565790b5533.tar.xz
ocfs2/dlm: Move kmalloc() outside the spinlock
In dlm_query_region_handler(), move the kmalloc outside the spinlock. This allows us to use GFP_KERNEL instead of GFP_ATOMIC. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/dlm/dlmdomain.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 7e38a072d720..99805d578ab5 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -926,9 +926,10 @@ static int dlm_assert_joined_handler(struct o2net_msg *msg, u32 len, void *data,
}
static int dlm_match_regions(struct dlm_ctxt *dlm,
- struct dlm_query_region *qr)
+ struct dlm_query_region *qr,
+ char *local, int locallen)
{
- char *local = NULL, *remote = qr->qr_regions;
+ char *remote = qr->qr_regions;
char *l, *r;
int localnr, i, j, foundit;
int status = 0;
@@ -957,13 +958,8 @@ static int dlm_match_regions(struct dlm_ctxt *dlm,
r += O2HB_MAX_REGION_NAME_LEN;
}
- local = kmalloc(sizeof(qr->qr_regions), GFP_ATOMIC);
- if (!local) {
- status = -ENOMEM;
- goto bail;
- }
-
- localnr = o2hb_get_all_regions(local, O2NM_MAX_REGIONS);
+ localnr = min(O2NM_MAX_REGIONS, locallen/O2HB_MAX_REGION_NAME_LEN);
+ localnr = o2hb_get_all_regions(local, (u8)localnr);
/* compare local regions with remote */
l = local;
@@ -1012,8 +1008,6 @@ static int dlm_match_regions(struct dlm_ctxt *dlm,
}
bail:
- kfree(local);
-
return status;
}
@@ -1075,6 +1069,7 @@ static int dlm_query_region_handler(struct o2net_msg *msg, u32 len,
{
struct dlm_query_region *qr;
struct dlm_ctxt *dlm = NULL;
+ char *local = NULL;
int status = 0;
int locked = 0;
@@ -1083,6 +1078,13 @@ static int dlm_query_region_handler(struct o2net_msg *msg, u32 len,
mlog(0, "Node %u queries hb regions on domain %s\n", qr->qr_node,
qr->qr_domain);
+ /* buffer used in dlm_mast_regions() */
+ local = kmalloc(sizeof(qr->qr_regions), GFP_KERNEL);
+ if (!local) {
+ status = -ENOMEM;
+ goto bail;
+ }
+
status = -EINVAL;
spin_lock(&dlm_domain_lock);
@@ -1112,13 +1114,15 @@ static int dlm_query_region_handler(struct o2net_msg *msg, u32 len,
goto bail;
}
- status = dlm_match_regions(dlm, qr);
+ status = dlm_match_regions(dlm, qr, local, sizeof(qr->qr_regions));
bail:
if (locked)
spin_unlock(&dlm->spinlock);
spin_unlock(&dlm_domain_lock);
+ kfree(local);
+
return status;
}