lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

drbd: fix schedule in atomic

Browse Source 
An administrative detach used to request a state change directly to D_DISKLESS,
first suspending IO to avoid the last put_ldev() occuring from an endio handler,
potentially in irq context.

This is not enough on the receiving side (typically secondary), we may miss
some peer_req on the way to local disk, which then may do the last put_ldev()
from their drbd_peer_request_endio().

This patch makes the detach always go through the intermediate D_FAILED state.
We may consider to rename it D_DETACHING.

Alternative approach would be to create yet an other work item to be scheduled
on the worker, do the destructor work from there, and get the timing right.

manually picked commit 564040f from the drbd 8.4 branch.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Lars Ellenberg
2011-05-02 11:51:31 +02:00
committed by Philipp Reisner
parent 99432fcc52
commit 9a0d9d0389
3 changed files with 16 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/drbd.h
View File

@@ -53,7 +53,7 @@
extern const char *drbd_buildtag(void);
#define REL_VERSION "8.3.10"
#define REL_VERSION "8.3.11"
#define API_VERSION 88
#define PRO_VERSION_MIN 86
#define PRO_VERSION_MAX 96