p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

fs: dlm: check for pending users filling buffers 

Currently we don't care if the DLM application stack is filling buffers
(not committed yet) while we transmit some already committed buffers.
By checking on active writequeue users before dequeue a writequeue entry
we know there is coming more data and do nothing. We wait until the send
worker will be triggered again if the writequeue entry users hit zero.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2021-11-30 14:47:15 -05:00 committed by David Teigland
parent f70813d6a5
commit bcbfea41e1
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/dlm/lowcomms.c
View File

@ -201,7 +201,10 @@ static struct writequeue_entry *con_next_wq(struct connection *con)
e = list_first_entry(&con->writequeue, struct writequeue_entry,
list);
if (e->len == 0)
/* if len is zero nothing is to send, if there are users filling
* buffers we wait until the users are done so we can send more.
*/
if (e->users || e->len == 0)
return NULL;
return e;