Revision 4fabb59449aa44a585b3603ffdadd4c5f4d0c033 authored by Wengang Wang on 06 July 2015, 06:35:11 UTC, committed by Doug Ledford on 14 July 2015, 17:20:11 UTC
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>
1 parent 0a69127
File | Mode | Size |
---|---|---|
arm | ||
Kconfig | -rw-r--r-- | 734 bytes |
async_pf.c | -rw-r--r-- | 5.4 KB |
async_pf.h | -rw-r--r-- | 1.1 KB |
coalesced_mmio.c | -rw-r--r-- | 4.1 KB |
coalesced_mmio.h | -rw-r--r-- | 875 bytes |
eventfd.c | -rw-r--r-- | 22.3 KB |
irqchip.c | -rw-r--r-- | 5.8 KB |
kvm_main.c | -rw-r--r-- | 81.5 KB |
vfio.c | -rw-r--r-- | 6.0 KB |
vfio.h | -rw-r--r-- | 250 bytes |
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...