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9 commits

Author SHA1 Message Date
Olivier Houchard
d1f3fb2cb4 Import CK as of commit 0f017230ccc86929f56bf44ef2dca93d7df8076b. 
This brings us the renaming of fields in ck_queue, so that our own
LIST/SLIST/TAILQ/etc won't accidentally work with them.
 2018-05-24 21:38:18 +00:00
Matt Macy
4c7d0d925f ck: add support for executing callbacks outside of main poll loop 
Pull in change from upstream deca119d14bfffd440770eb67cbdbeaf7b57eb7b

|    ck_epoch: introduce ck_epoch_deferred
|
|    Allow for deferral to occur outside epoch poll critical loop (which may access per-CPU structures).
|

Approved by:	sbruno
 2018-05-17 18:14:10 +00:00
Olivier Houchard
271ce40239 Import CK as of commit b19ed4c6a56ec93215ab567ba18ba61bf1cfbac8 
It should fix ck_pr_[load|store]_ptr on mips and riscv, make sure no
*fence instructions are used on i386, as older cpus don't support it, and
make sure we don't rely on gcc builtins that can lead to calls to
libatomic when linked with -O0.

MFC after:	1 week
 2018-04-02 23:40:50 +00:00
Olivier Houchard
a72c9dc53f Define CK_MD_TSO for the relevant arches (i386, amd64 and sparc64). 
Defaulting to CK_MD_RMO has the unfortunate side effect of generating
memory barriers that are useless on those arches, and the even more
unfortunate side effect of generating lfence/sfence/mfence on i386, even
if older CPUs don't support it.
This should fix the panic reported when using IPFW on a Pentium 3.
Note that mfence and sfence might still be used in a few case, but that
shouldn't happen in FreeBSD right now, and should be fixed upstream first.

MFC after:	1 week
 2018-02-16 17:50:06 +00:00
Olivier Houchard
7e8cd4e1af Import CK as of commit 6b141c0bdd21ce8b3e14147af8f87f22b20ecf32 
This brings us changes we needed in ck_epoch.
 2017-04-09 21:02:05 +00:00
Olivier Houchard
08c22689e6 Merge CK as of commit 24d26965d1a28039062ba3bcf9433b623f3d2c5e, to get 
a fix in ck_epoch.
 2017-02-28 23:30:14 +00:00
Olivier Houchard
8f87df16d4 Merge CK as of commit 255a47553aa5e8d0bb5f8eec63acac7f4c25a6d8, mostly 
to make sure we don't use any FP instruction.
 2016-12-30 18:23:58 +00:00
Olivier Houchard
5ac7aafe09 Add FreeBSD-specific files. 2016-11-28 20:33:30 +00:00
Olivier Houchard
1fb62fb074 Import Concurrency Kit in the kernel. 
CK is a toolkit providing different lockfree algorithms/data structures.
More information can be found here : www.concurrencykit.org
 2016-11-28 20:27:58 +00:00