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Merge of Wu's GSOC 09 branch (src.20090525.r4372.wu)

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Main changes:
- COW optimization for safecopy.
- safemap, a grant-based interface for sharing memory regions between processes.
- Integration with safemap and complete rework of DS, supporting new data types
  natively (labels, memory ranges, memory mapped ranges).
- For further information:
  http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants

Additional changes not included in the original Wu's branch:
- Fixed unhandled case in VM when using COW optimization for safecopy in case
  of a block that has already been shared as SMAP.
- Better interface and naming scheme for sys_saferevmap and ds_retrieve_map
  calls.
- Better input checking in syslib: check for page alignment when creating
  memory mapping grants.
- DS notifies subscribers when an entry is deleted.
- Documented the behavior of indirect grants in case of memory mapping.
- Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked
  and extended.
- Minor fixes and general cleanup.
- TO-DO: Grant ids should be generated and managed the way endpoints are to make
sure grant slots are never misreused.
This commit is contained in:
Cristiano Giuffrida
2010-01-14 15:24:16 +00:00
parent da3b64d8bc
commit c5b309ff07
99 changed files with 3594 additions and 851 deletions
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9
kernel/arch/i386/memory.c
View File

@@ -613,10 +613,11 @@ PUBLIC int vm_suspend(struct proc *caller, struct proc *target,
util_stacktrace_strcat(caller->p_vmrequest.stacktrace);
#endif
caller->p_vmrequest.writeflag = 1;
caller->p_vmrequest.start = linaddr;
caller->p_vmrequest.length = len;
caller->p_vmrequest.who = target->p_endpoint;
caller->p_vmrequest.req_type = VMPTYPE_CHECK;
caller->p_vmrequest.target = target->p_endpoint;
caller->p_vmrequest.params.check.start = linaddr;
caller->p_vmrequest.params.check.length = len;
caller->p_vmrequest.params.check.writeflag = 1;
caller->p_vmrequest.type = type;
/* Connect caller on vmrequest wait queue. */

7
kernel/arch/i386/protect.c
View File

@@ -137,12 +137,7 @@ PUBLIC void prot_init(void)
/* Click-round kernel. */
if(kinfo.data_base % CLICK_SIZE)
minix_panic("kinfo.data_base not aligned", NO_NUM);
kinfo.data_size = ((kinfo.data_size+CLICK_SIZE-1)/CLICK_SIZE) * CLICK_SIZE;
/* Click-round kernel. */
if(kinfo.data_base % CLICK_SIZE)
minix_panic("kinfo.data_base not aligned", NO_NUM);
kinfo.data_size = ((kinfo.data_size+CLICK_SIZE-1)/CLICK_SIZE) * CLICK_SIZE;
kinfo.data_size = (phys_bytes) (CLICK_CEIL(kinfo.data_size));
/* Build gdt and idt pointers in GDT where the BIOS expects them. */
dtp= (struct desctableptr_s *) &gdt[GDT_INDEX];