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Add some unspeakable hackery to the tree under #ifdef __ia64__ to work

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around limitations in the ia64 kernel stack handling code.  Basically
preallocate a bunch of threads (and hence kstacks) while contigmalloc()
still works, and never free them back to the general memory pool.  After
the system has been running for a while, contigmalloc() eventually fails
at a critical momemt and panics the system.
This commit is contained in:
Peter Wemm 2002-10-04 01:31:39 +00:00
parent 74cf93d79d
commit c281972e61
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=104437
2 changed files with 28 additions and 0 deletions
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14
sys/kern/kern_kse.c
View File

@ -216,9 +216,23 @@ void
threadinit(void)
{
#ifndef __ia64__
thread_zone = uma_zcreate("THREAD", sizeof (struct thread),
thread_ctor, thread_dtor, thread_init, thread_fini,
UMA_ALIGN_CACHE, 0);
#else
/*
* XXX the ia64 kstack allocator is really lame and is at the mercy
* of contigmallloc(). This hackery is to pre-construct a whole
* pile of thread structures with associated kernel stacks early
* in the system startup while contigmalloc() still works. Once we
* have them, keep them. Sigh.
*/
thread_zone = uma_zcreate("THREAD", sizeof (struct thread),
thread_ctor, thread_dtor, thread_init, thread_fini,
UMA_ALIGN_CACHE, UMA_ZONE_NOFREE);
uma_prealloc(thread_zone, 512); /* XXX arbitary */
#endif
ksegrp_zone = uma_zcreate("KSEGRP", sizeof (struct ksegrp),
NULL, NULL, NULL, NULL,
UMA_ALIGN_CACHE, 0);

14
sys/kern/kern_thread.c
View File

@ -216,9 +216,23 @@ void
threadinit(void)
{
#ifndef __ia64__
thread_zone = uma_zcreate("THREAD", sizeof (struct thread),
thread_ctor, thread_dtor, thread_init, thread_fini,
UMA_ALIGN_CACHE, 0);
#else
/*
* XXX the ia64 kstack allocator is really lame and is at the mercy
* of contigmallloc(). This hackery is to pre-construct a whole
* pile of thread structures with associated kernel stacks early
* in the system startup while contigmalloc() still works. Once we
* have them, keep them. Sigh.
*/
thread_zone = uma_zcreate("THREAD", sizeof (struct thread),
thread_ctor, thread_dtor, thread_init, thread_fini,
UMA_ALIGN_CACHE, UMA_ZONE_NOFREE);
uma_prealloc(thread_zone, 512); /* XXX arbitary */
#endif
ksegrp_zone = uma_zcreate("KSEGRP", sizeof (struct ksegrp),
NULL, NULL, NULL, NULL,
UMA_ALIGN_CACHE, 0);