364fe8e597
writes are running. Some of the cases which are not handled properly in driver are: 1. With R1 fastpath supported, single write from CAM layer can consume 2 MPT frames at driver/firmware level for fastpath qualification(if fw_outstanding < controller Queue Depth). Due to this driver has to throttle IOs coming from CAM layer as well as second fastpath write(of R1 write) against Adapter Queue Depth. If "fw_outstanding" reaches to adapter queue depth, driver should return IOs from CAM layer with device busy status.While allocating second MPT frame(corresponding to R1 FP write) also, driver should ensure fw_outstanding should not exceed adapter QD. 2. For R1 fastpath writes completion, driver decrements "fw_oustanding" counter without really returning MPT frame to free pool. It may cause IOs(with heavy IOs running, consuming whole adapter Queue Depth) consuming MPT frames reserved for DCMDs(management commands) and DCMDs(internal and sent by application) not getting MPT frame will start failing. Below is one test case to hit the issue described above- 1. Run heavy IOs (outstanding IOs should hit adapter Queue Depth). 2. Run management tool (Broadcom's storcli tool) querying adapter in loop (run command- "storcli64 /c0 show" in loop). 3. Management tool's requests would start failing due to non-availability of free MPT frames as all frames would be consumed by IOs. Fix: Increment/decrement of "fw_outstanding" counter should be in sync with MPT frame get/return. Submitted by: Sumit Saxena <sumit.saxena@broadcom.com> Reviewed by: Kashyap Desai <Kashyap.Desai@broadcom.com> Approved by: Ken MFC after: 3 days Sponsored by: Broadcom Inc |
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| 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 | ||
| .gitattributes | ||
| .gitignore | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| Makefile.sys.inc | ||
| ObsoleteFiles.inc | ||
| README | ||
| README.md | ||
| UPDATING | ||
FreeBSD Source:
This is the top level of the FreeBSD source directory. This file
was last revised on:
FreeBSD
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), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.
Source Roadmap:
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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 Various commands and libraries under the GNU Public License.
Please see gnu/COPYING* 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.
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secure Cryptographic libraries and commands.
share Shared resources.
stand Boot loader sources.
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used in release builds. NOTES contains documentation of
all possible entries.
tests Regression tests which can be run by Kyua. See tests/README
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For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see:
https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html