https://github.com/torvalds/linux
Revision 62bdf94a2049822ef8c6d4b0e83cd9c3a1663ab4 authored by Chuck Lever on 07 November 2016, 21:16:24 UTC, committed by Anna Schumaker on 10 November 2016, 16:04:54 UTC
When a LOCALINV WR is flushed, the frmr is marked STALE, then frwr_op_unmap_sync DMA-unmaps the frmr's SGL. These STALE frmrs are then recovered when frwr_op_map hunts for an INVALID frmr to use. All other cases that need frmr recovery leave that SGL DMA-mapped. The FRMR recovery path unconditionally DMA-unmaps the frmr's SGL. To avoid DMA unmapping the SGL twice for flushed LOCAL_INV WRs, alter the recovery logic (rather than the hot frwr_op_unmap_sync path) to distinguish among these cases. This solution also takes care of the case where multiple LOCAL_INV WRs are issued for the same rpcrdma_req, some complete successfully, but some are flushed. Reported-by: Vasco Steinmetz <linux@kyberraum.net> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Vasco Steinmetz <linux@kyberraum.net> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
1 parent 0ac84b7
Tip revision: 62bdf94a2049822ef8c6d4b0e83cd9c3a1663ab4 authored by Chuck Lever on 07 November 2016, 21:16:24 UTC
xprtrdma: Fix DMAR failure in frwr_op_map() after reconnect
xprtrdma: Fix DMAR failure in frwr_op_map() after reconnect
Tip revision: 62bdf94
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitignore | -rw-r--r-- | 1.3 KB |
| .mailmap | -rw-r--r-- | 7.3 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 95.5 KB |
| Kbuild | -rw-r--r-- | 2.8 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 363.7 KB |
| Makefile | -rw-r--r-- | 56.8 KB |
| README | -rw-r--r-- | 18.1 KB |
| REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
Computing file changes ...
