xavi/android_kernel_m2note/net/rds/ib_rdma.c, branch ng-7.1.2Unnamed repository; edit this file 'description' to name the repository.
https://gitea.privatedns.org/xavi/android_kernel_m2note/atom?h=ng-7.1.22017-12-25T15:11:14+00:00arm64: use the new *_relaxed macros for lower power usage2017-12-25T15:11:14+00:00franciscofrancofranciscofranco.1990@gmail.com2015-12-05T04:01:17+00:00urn:sha1:2d6a958ab8f0aaa9c20738a0ac22ba94ae000362
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Joe Maples <joe@frap129.org>
Signed-off-by: Mister Oyster <oysterized@gmail.com>
rds: rds_ib_device.refcount overflow2016-08-26T17:58:51+00:00Wengang Wangwen.gang.wang@oracle.com2015-07-06T06:35:11+00:00urn:sha1:6eca7dd91a1144949fb7bd4196bdaf37dee2e4ed
commit 4fabb59449aa44a585b3603ffdadd4c5f4d0c033 upstream.
Fixes: 3e0249f9c05c ("RDS/IB: add refcount tracking to struct rds_ib_device")
There lacks a dropping on rds_ib_device.refcount in case rds_ib_alloc_fmr
failed(mr pool running out). this lead to the refcount overflow.
A complain in line 117(see following) is seen. From vmcore:
s_ib_rdma_mr_pool_depleted is 2147485544 and rds_ibdev->refcount is -2147475448.
That is the evidence the mr pool is used up. so rds_ib_alloc_fmr is very likely
to return ERR_PTR(-EAGAIN).
115 void rds_ib_dev_put(struct rds_ib_device *rds_ibdev)
116 {
117 BUG_ON(atomic_read(&rds_ibdev->refcount) <= 0);
118 if (atomic_dec_and_test(&rds_ibdev->refcount))
119 queue_work(rds_wq, &rds_ibdev->free_work);
120 }
fix is to drop refcount when rds_ib_alloc_fmr failed.
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Guendhoer <stefan@guendhoer.com>
first commit2016-08-15T02:19:42+00:00Meizu OpenSourcepatchwork@meizu.com2016-08-15T02:19:42+00:00urn:sha1:d2e1446d81725c351dc73a03b397ce043fb18452