Date: Wed, 21 Jul 2010 09:27:00 +0000 (UTC) From: "Jayachandran C." <jchandra@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/mips/include vmparam.h src/sys/mips/mips pmap.c src/sys/vm vm_page.c vm_page.h vm_phys.c vm_phys.h Message-ID: <201007211833.o6LIXTk7099552@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
jchandra 2010-07-21 09:27:00 UTC
FreeBSD src repository
Modified files:
sys/mips/include vmparam.h
sys/mips/mips pmap.c
sys/vm vm_page.c vm_page.h vm_phys.c vm_phys.h
Log:
SVN rev 210327 on 2010-07-21 09:27:00Z by jchandra
Redo the page table page allocation on MIPS, as suggested by
alc@.
The UMA zone based allocation is replaced by a scheme that creates
a new free page list for the KSEG0 region, and a new function
in sys/vm that allocates pages from a specific free page list.
This also fixes a race condition introduced by the UMA based page table
page allocation code. Dropping the page queue and pmap locks before
the call to uma_zfree, and re-acquiring them afterwards will introduce
a race condtion(noted by alc@).
The changes are :
- Revert the earlier changes in MIPS pmap.c that added UMA zone for
page table pages.
- Add a new freelist VM_FREELIST_HIGHMEM to MIPS vmparam.h for memory that
is not directly mapped (in 32bit kernel). Normal page allocations will first
try the HIGHMEM freelist and then the default(direct mapped) freelist.
- Add a new function 'vm_page_t vm_page_alloc_freelist(int flind, int
order, int req)' to vm/vm_page.c to allocate a page from a specified
freelist. The MIPS page table pages will be allocated using this function
from the freelist containing direct mapped pages.
- Move the page initialization code from vm_phys_alloc_contig() to a
new function vm_page_alloc_init(), and use this function to initialize
pages in vm_page_alloc_freelist() too.
- Split the function vm_phys_alloc_pages(int pool, int order) to create
vm_phys_alloc_freelist_pages(int flind, int pool, int order), and use
this function from both vm_page_alloc_freelist() and vm_phys_alloc_pages().
Reviewed by: alc
Revision Changes Path
1.6 +14 -4 src/sys/mips/include/vmparam.h
1.69 +34 -100 src/sys/mips/mips/pmap.c
1.419 +89 -0 src/sys/vm/vm_page.c
1.178 +3 -0 src/sys/vm/vm_page.h
1.14 +61 -74 src/sys/vm/vm_phys.c
1.7 +1 -0 src/sys/vm/vm_phys.h
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201007211833.o6LIXTk7099552>