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Fix an issue with the dynamic pcpu/vnet data allocators.

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We cannot expect that modspace is the last entry in the linker
set and thus that modspace + possible extra space up to PAGE_SIZE
would be contiguous.  For the moment do not support more than
*_MODMIN space and ignore the extra space (*).

(*) We know how to get it back but it'll need testing.

Discussed with:	jeff, rwatson (briefly)
Reviewed by:	jeff
Sponsored by:	The FreeBSD Foundation
Sponsored by:	CK Software GmbH
MFC after:	4 days
This commit is contained in:
Bjoern A. Zeeb 2010-05-14 21:11:58 +00:00
parent 881bfb7497
commit 793f71bf2e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=208100
2 changed files with 2 additions and 2 deletions
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2
sys/kern/subr_pcpu.c
View File

@ -125,7 +125,7 @@ dpcpu_startup(void *dummy __unused)
df = malloc(sizeof(*df), M_PCPU, M_WAITOK | M_ZERO);
df->df_start = (uintptr_t)&DPCPU_NAME(modspace);
df->df_len = DPCPU_MODSIZE;
df->df_len = DPCPU_MODMIN;
TAILQ_INSERT_HEAD(&dpcpu_head, df, df_link);
sx_init(&dpcpu_lock, "dpcpu alloc lock");
}

2
sys/net/vnet.c
View File

@ -348,7 +348,7 @@ vnet_data_startup(void *dummy __unused)
df = malloc(sizeof(*df), M_VNET_DATA_FREE, M_WAITOK | M_ZERO);
df->vnd_start = (uintptr_t)&VNET_NAME(modspace);
df->vnd_len = VNET_MODSIZE;
df->vnd_len = VNET_MODMIN;
TAILQ_INSERT_HEAD(&vnet_data_free_head, df, vnd_link);
sx_init(&vnet_data_free_lock, "vnet_data alloc lock");
}