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| author | Joseph Qi <joseph.qi@huawei.com> | 2014-12-10 15:41:34 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-10 17:41:03 -0800 |
| commit | f08736bd6c54c33b91d4324eee5713ca6f13319a (patch) | |
| tree | 3bc3b44ce5e8a8d48af345ebb1748b4a598a212b /fs | |
| parent | ded00142740f54610b7e256201c45a3bfa5f14e5 (diff) | |
| download | linux-exynos-f08736bd6c54c33b91d4324eee5713ca6f13319a.tar.gz linux-exynos-f08736bd6c54c33b91d4324eee5713ca6f13319a.tar.bz2 linux-exynos-f08736bd6c54c33b91d4324eee5713ca6f13319a.zip | |
ocfs2/dlm: let sender retry if dlm_dispatch_assert_master failed with -ENOMEM
Do not BUG() if GFP_ATOMIC allocation fails in dlm_dispatch_assert_master.
Instead, return -ENOMEM to the sender and then retry.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Alex Chen <alex.chen@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ocfs2/dlm/dlmrecovery.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c index 3365839d2971..79b5af5e6a7b 100644 --- a/fs/ocfs2/dlm/dlmrecovery.c +++ b/fs/ocfs2/dlm/dlmrecovery.c @@ -1656,14 +1656,18 @@ int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, req.namelen = res->lockname.len; memcpy(req.name, res->lockname.name, res->lockname.len); +resend: ret = o2net_send_message(DLM_MASTER_REQUERY_MSG, dlm->key, &req, sizeof(req), nodenum, &status); - /* XXX: negative status not handled properly here. */ if (ret < 0) mlog(ML_ERROR, "Error %d when sending message %u (key " "0x%x) to node %u\n", ret, DLM_MASTER_REQUERY_MSG, dlm->key, nodenum); - else { + else if (status == -ENOMEM) { + mlog_errno(status); + msleep(50); + goto resend; + } else { BUG_ON(status < 0); BUG_ON(status > DLM_LOCK_RES_OWNER_UNKNOWN); *real_master = (u8) (status & 0xff); @@ -1705,9 +1709,13 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data, int ret = dlm_dispatch_assert_master(dlm, res, 0, 0, flags); if (ret < 0) { - mlog_errno(-ENOMEM); - /* retry!? */ - BUG(); + mlog_errno(ret); + spin_unlock(&res->spinlock); + dlm_lockres_put(res); + spin_unlock(&dlm->spinlock); + dlm_put(dlm); + /* sender will take care of this and retry */ + return ret; } else __dlm_lockres_grab_inflight_worker(dlm, res); spin_unlock(&res->spinlock); |