Date: Tue, 7 Feb 2017 17:03:23 +0000 (UTC) From: Mateusz Guzik <mjg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r313391 - head/sys/kern Message-ID: <201702071703.v17H3NBh071984@repo.freebsd.org>
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Author: mjg Date: Tue Feb 7 17:03:22 2017 New Revision: 313391 URL: https://svnweb.freebsd.org/changeset/base/313391 Log: Bump struct thread alignment to 32. This gives additional bits to use in locking primitives which store the lock thread pointer in the lock value. Discussed with: kib Modified: head/sys/kern/init_main.c head/sys/kern/kern_thread.c Modified: head/sys/kern/init_main.c ============================================================================== --- head/sys/kern/init_main.c Tue Feb 7 16:01:07 2017 (r313390) +++ head/sys/kern/init_main.c Tue Feb 7 17:03:22 2017 (r313391) @@ -99,7 +99,7 @@ void mi_startup(void); /* Should be e static struct session session0; static struct pgrp pgrp0; struct proc proc0; -struct thread0_storage thread0_st __aligned(16); +struct thread0_storage thread0_st __aligned(32); struct vmspace vmspace0; struct proc *initproc; Modified: head/sys/kern/kern_thread.c ============================================================================== --- head/sys/kern/kern_thread.c Tue Feb 7 16:01:07 2017 (r313390) +++ head/sys/kern/kern_thread.c Tue Feb 7 17:03:22 2017 (r313391) @@ -281,7 +281,7 @@ threadinit(void) thread_zone = uma_zcreate("THREAD", sched_sizeof_thread(), thread_ctor, thread_dtor, thread_init, thread_fini, - 16 - 1, UMA_ZONE_NOFREE); + 32 - 1, UMA_ZONE_NOFREE); tidhashtbl = hashinit(maxproc / 2, M_TIDHASH, &tidhash); rw_init(&tidhash_lock, "tidhash"); }
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