Revision be14eb619108fa8b7120eb2c42d66d5f623ae10e authored by Brian King on 10 September 2010, 07:03:21 UTC, committed by Jens Axboe on 10 September 2010, 07:03:21 UTC
While testing CPU DLPAR, the following problem was discovered. We were DLPAR removing the first CPU, which in this case was logical CPUs 0-3. CPUs 0-2 were already marked offline and we were in the process of offlining CPU 3. After marking the CPU inactive and offline in cpu_disable, but before the cpu was completely idle (cpu_die), we ended up in __make_request on CPU 3. There we looked at the topology map to see which CPU to complete the I/O on and found no CPUs in the cpu_sibling_map. This resulted in the block layer setting the completion cpu to be NR_CPUS, which then caused an oops when we tried to complete the I/O. Fix this by sanity checking the value we return from blk_cpu_to_group to be a valid cpu value. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 717 bytes |
| Makefile | -rw-r--r-- | 607 bytes |
| af_rds.c | -rw-r--r-- | 14.0 KB |
| bind.c | -rw-r--r-- | 5.1 KB |
| cong.c | -rw-r--r-- | 12.0 KB |
| connection.c | -rw-r--r-- | 13.6 KB |
| ib.c | -rw-r--r-- | 8.8 KB |
| ib.h | -rw-r--r-- | 11.6 KB |
| ib_cm.c | -rw-r--r-- | 21.3 KB |
| ib_rdma.c | -rw-r--r-- | 16.2 KB |
| ib_recv.c | -rw-r--r-- | 27.4 KB |
| ib_ring.c | -rw-r--r-- | 4.8 KB |
| ib_send.c | -rw-r--r-- | 26.1 KB |
| ib_stats.c | -rw-r--r-- | 2.8 KB |
| ib_sysctl.c | -rw-r--r-- | 4.6 KB |
| info.c | -rw-r--r-- | 6.5 KB |
| info.h | -rw-r--r-- | 934 bytes |
| iw.c | -rw-r--r-- | 8.8 KB |
| iw.h | -rw-r--r-- | 12.3 KB |
| iw_cm.c | -rw-r--r-- | 20.8 KB |
| iw_rdma.c | -rw-r--r-- | 24.2 KB |
| iw_recv.c | -rw-r--r-- | 26.0 KB |
| iw_ring.c | -rw-r--r-- | 4.8 KB |
| iw_send.c | -rw-r--r-- | 29.1 KB |
| iw_stats.c | -rw-r--r-- | 2.8 KB |
| iw_sysctl.c | -rw-r--r-- | 4.2 KB |
| loop.c | -rw-r--r-- | 5.4 KB |
| loop.h | -rw-r--r-- | 137 bytes |
| message.c | -rw-r--r-- | 10.1 KB |
| page.c | -rw-r--r-- | 5.9 KB |
| rdma.c | -rw-r--r-- | 18.0 KB |
| rdma.h | -rw-r--r-- | 2.2 KB |
| rdma_transport.c | -rw-r--r-- | 5.5 KB |
| rdma_transport.h | -rw-r--r-- | 629 bytes |
| rds.h | -rw-r--r-- | 22.2 KB |
| recv.c | -rw-r--r-- | 15.3 KB |
| send.c | -rw-r--r-- | 27.7 KB |
| stats.c | -rw-r--r-- | 4.3 KB |
| sysctl.c | -rw-r--r-- | 3.6 KB |
| tcp.c | -rw-r--r-- | 8.7 KB |
| tcp.h | -rw-r--r-- | 2.8 KB |
| tcp_connect.c | -rw-r--r-- | 4.2 KB |
| tcp_listen.c | -rw-r--r-- | 5.1 KB |
| tcp_recv.c | -rw-r--r-- | 9.4 KB |
| tcp_send.c | -rw-r--r-- | 7.5 KB |
| tcp_stats.c | -rw-r--r-- | 2.3 KB |
| threads.c | -rw-r--r-- | 8.6 KB |
| transport.c | -rw-r--r-- | 3.4 KB |
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