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27 March 2024, 02:37:15 UTC
Revision da573eaa3a13f60efafcbe25e4f4465cf1a1b40b authored by Logan Gunthorpe on 20 June 2016, 19:15:05 UTC, committed by Jon Mason on 05 August 2016, 14:21:06 UTC 
ntb_perf: Improve thread handling to increase robustness
 
This commit accomplishes a few things:

1) Properly prevent multiple sets of threads from running at once using
a mutex. Lots of race issues existed with the thread_cleanup.

2) The mutex allows us to ensure that threads are finished before
tearing down the device or module.

3) Don't use kthread_stop when the threads can exit by themselves, as
this is counter-indicated by the kthread_create documentation. Threads
now wait for kthread_stop to occur.

4) Writing to the run file now blocks until the threads are complete.
The test can then be safely interrupted by a SIGINT.

Also, while I was at it:

5) debugfs_run_write shouldn't return 0 in the early check cases as this
could cause debugfs_run_write to loop undesirably.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
1 parent fd2ecd8
History
Tip revision: da573eaa3a13f60efafcbe25e4f4465cf1a1b40b authored by Logan Gunthorpe on 20 June 2016, 19:15:05 UTC
ntb_perf: Improve thread handling to increase robustness
Tip revision: da573ea
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arch
block
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drivers
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fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.get_maintainer.ignore -rw-r--r-- 31 bytes
.gitignore -rw-r--r-- 1.2 KB
.mailmap -rw-r--r-- 6.4 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-- 353.8 KB
Makefile -rw-r--r-- 56.0 KB
README -rw-r--r-- 18.1 KB
REPORTING-BUGS -rw-r--r-- 7.3 KB

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