On Tue, Nov 28, 2017 at 11:58:07PM +0530, Bharat Potnuri wrote: > isert commands that failed during isert_rdma_rw_ctx_post() are queued to > Queue-Full(QF) queue and are scheduled to be reposted during queue-full > queue processing. During this reposting, the rdma contexts are initialised > again in isert_rdma_rw_ctx_post(), which is leaking significant memory. > > unreferenced object 0xffff8830201d9640 (size 64): > comm "kworker/0:2", pid 195, jiffies 4295374851 (age 4528.436s) > hex dump (first 32 bytes): > 00 60 8b cb 2e 00 00 00 00 10 00 00 00 00 00 00 .`.............. > 00 90 e3 cb 2e 00 00 00 00 10 00 00 00 00 00 00 ................ > backtrace: > [<ffffffff8170711e>] kmemleak_alloc+0x4e/0xb0 > [<ffffffff811f8ba5>] __kmalloc+0x125/0x2b0 > [<ffffffffa046b24f>] rdma_rw_ctx_init+0x15f/0x6f0 [ib_core] > [<ffffffffa07ab644>] isert_rdma_rw_ctx_post+0xc4/0x3c0 [ib_isert] > [<ffffffffa07ad972>] isert_put_datain+0x112/0x1c0 [ib_isert] > [<ffffffffa07dddce>] lio_queue_data_in+0x2e/0x30 [iscsi_target_mod] > [<ffffffffa076c322>] target_qf_do_work+0x2b2/0x4b0 [target_core_mod] > [<ffffffff81080c3b>] process_one_work+0x1db/0x5d0 > [<ffffffff8108107d>] worker_thread+0x4d/0x3e0 > [<ffffffff81088667>] kthread+0x117/0x150 > [<ffffffff81713fa7>] ret_from_fork+0x27/0x40 > [<ffffffffffffffff>] 0xffffffffffffffff > > Here is patch to use the older rdma contexts while reposting > the isert commands intead of reinitialising them. > > Signed-off-by: Potnuri Bharat Teja <bharat@xxxxxxxxxxx> > Reviewed-by: Sagi Grimberg <sagi@xxxxxxxxxxx> > drivers/infiniband/ulp/isert/ib_isert.c | 7 +++++++ > drivers/infiniband/ulp/isert/ib_isert.h | 1 + > 2 files changed, 8 insertions(+) Thanks, applied to RDMA for-next Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
