d4959bfcd1
Next phase of error recovery: Eliminate the REOVERY_START phase, since we don't need to wait to start recovery. Eliminate the RECOVERY_RESET phase since it is transient, we now transition from RECOVERY_NORMAL into RECOVERY_WAITING. In normal mode, read the status of the controller. If it is in failed state, or appears to be hot-plugged, jump directly to reset which will sort out the proper things to do. This will cause all pending I/O to complete with an abort status before the reset. When in the NORMAL state, call the interrupt handler. This will complete all pending transactions when interrupts are broken or temporarily misbehaving. We then check all the pending completions for timeouts. If we have abort enabled, then we'll send an abort. Otherwise we'll assume the controller is wedged and needs a reset. By calling the interrupt handler here, we'll avoid an issue with the current code where we transitioned to RECOVERY_START which prevented any completions from happening. Now completions happen. In addition and follow-on I/O that is scheduled in the completion routines will be submitted, rather than queued, because the recovery state is correct. This also fixes a problem where I/O would timeout, but never complete, leading to hung I/O. Resetting remains the same as before, just when we chose to reset has changed. A nice side effect of these changes is that we now do I/O when interrupts to the card are totally broken. Followon commits will improve the error reporting and logging when this happens. Performance will be aweful, but will at least be minimally functional. There is a small race when we're checking the completions if interrupts are working, but this is handled in a future commit. Sponsored by: Netflix MFC After: 2 weeks Differential Revision: https://reviews.freebsd.org/D36922 |
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|---|---|---|
| .cirrus-ci | ||
| .github | ||
| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| stand | ||
| sys | ||
| targets | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| .cirrus.yml | ||
| .clang-format | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| CONTRIBUTING.md | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| Makefile.sys.inc | ||
| ObsoleteFiles.inc | ||
| README.md | ||
| RELNOTES | ||
| UPDATING | ||
FreeBSD Source:
This is the top level of the FreeBSD source directory.
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.
The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.
For information on the CPU architectures and platforms supported by FreeBSD, see the FreeBSD website's Platforms page.
Source Roadmap:
| Directory | Description |
|---|---|
| bin | System/user commands. |
| cddl | Various commands and libraries under the Common Development and Distribution License. |
| contrib | Packages contributed by 3rd parties. |
| crypto | Cryptography stuff (see crypto/README). |
| etc | Template files for /etc. |
| gnu | Commands and libraries under the GNU General Public License (GPL) or Lesser General Public License (LGPL). Please see gnu/COPYING and gnu/COPYING.LIB for more information. |
| include | System include files. |
| kerberos5 | Kerberos5 (Heimdal) package. |
| lib | System libraries. |
| libexec | System daemons. |
| release | Release building Makefile & associated tools. |
| rescue | Build system for statically linked /rescue utilities. |
| sbin | System commands. |
| secure | Cryptographic libraries and commands. |
| share | Shared resources. |
| stand | Boot loader sources. |
| sys | Kernel sources (see sys/README.md). |
| targets | Support for experimental DIRDEPS_BUILD |
| tests | Regression tests which can be run by Kyua. See tests/README for additional information. |
| tools | Utilities for regression testing and miscellaneous tasks. |
| usr.bin | User commands. |
| usr.sbin | System administration commands. |
For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see FreeBSD Handbook.