This is a note to let you know that I've just added the patch titled
RDMA/iser: Fix possible mr leak on device removal event
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-iser-fix-possible-mr-leak-on-device-removal-event.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Dec 21 09:02:40 CET 2017
From: Sagi Grimberg <sagi@xxxxxxxxxxx>
Date: Mon, 27 Feb 2017 20:16:33 +0200
Subject: RDMA/iser: Fix possible mr leak on device removal event
From: Sagi Grimberg <sagi@xxxxxxxxxxx>
[ Upstream commit ea174c9573b0e0c8bc1a7a90fe9360ccb7aa9cbb ]
When the rdma device is removed, we must cleanup all
the rdma resources within the DEVICE_REMOVAL event
handler to let the device teardown gracefully. When
this happens with live I/O, some memory regions are
occupied. Thus, track them too and dereg all the mr's.
We are safe with mr access by iscsi_iser_cleanup_task.
Reported-by: Raju Rangoju <rajur@xxxxxxxxxxx>
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
Reviewed-by: Max Gurtovoy <maxg@xxxxxxxxxxxx>
Reviewed-by: Max Gurtovoy <maxg@xxxxxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/ulp/iser/iscsi_iser.h | 2 ++
drivers/infiniband/ulp/iser/iser_verbs.c | 8 +++++---
2 files changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -430,6 +430,7 @@ struct iser_fr_desc {
struct list_head list;
struct iser_reg_resources rsc;
struct iser_pi_context *pi_ctx;
+ struct list_head all_list;
};
/**
@@ -443,6 +444,7 @@ struct iser_fr_pool {
struct list_head list;
spinlock_t lock;
int size;
+ struct list_head all_list;
};
/**
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -362,6 +362,7 @@ int iser_alloc_fastreg_pool(struct ib_co
int i, ret;
INIT_LIST_HEAD(&fr_pool->list);
+ INIT_LIST_HEAD(&fr_pool->all_list);
spin_lock_init(&fr_pool->lock);
fr_pool->size = 0;
for (i = 0; i < cmds_max; i++) {
@@ -373,6 +374,7 @@ int iser_alloc_fastreg_pool(struct ib_co
}
list_add_tail(&desc->list, &fr_pool->list);
+ list_add_tail(&desc->all_list, &fr_pool->all_list);
fr_pool->size++;
}
@@ -392,13 +394,13 @@ void iser_free_fastreg_pool(struct ib_co
struct iser_fr_desc *desc, *tmp;
int i = 0;
- if (list_empty(&fr_pool->list))
+ if (list_empty(&fr_pool->all_list))
return;
iser_info("freeing conn %p fr pool\n", ib_conn);
- list_for_each_entry_safe(desc, tmp, &fr_pool->list, list) {
- list_del(&desc->list);
+ list_for_each_entry_safe(desc, tmp, &fr_pool->all_list, all_list) {
+ list_del(&desc->all_list);
iser_free_reg_res(&desc->rsc);
if (desc->pi_ctx)
iser_free_pi_ctx(desc->pi_ctx);
Patches currently in stable-queue which might be from sagi@xxxxxxxxxxx are
queue-4.9/nvme-loop-handle-cpu-unplug-when-re-establishing-the-controller.patch
queue-4.9/ib-core-protect-against-self-requeue-of-a-cq-work-item.patch
queue-4.9/rdma-iser-fix-possible-mr-leak-on-device-removal-event.patch