mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-17 10:26:15 +00:00
Code Issues Releases Activity

Revise the locking in mincore(2).

Browse Source
This commit is contained in:
Alan Cox 2003-09-07 18:47:54 +00:00
parent 0c806fab67
commit 7ebcee376a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=119858
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
sys/vm/vm_mmap.c
View File

@ -845,7 +845,6 @@ mincore(td, uap)
*/
vec = uap->vec;
mtx_lock(&Giant);
pmap = vmspace_pmap(td->td_proc->p_vmspace);
vm_map_lock_read(map);
@ -891,7 +890,9 @@ mincore(td, uap)
* it can provide info as to whether we are the
* one referencing or modifying the page.
*/
mtx_lock(&Giant);
mincoreinfo = pmap_mincore(pmap, addr);
mtx_unlock(&Giant);
if (!mincoreinfo) {
vm_pindex_t pindex;
vm_ooffset_t offset;
@ -904,14 +905,13 @@ mincore(td, uap)
VM_OBJECT_LOCK(current->object.vm_object);
m = vm_page_lookup(current->object.vm_object,
pindex);
VM_OBJECT_UNLOCK(current->object.vm_object);
vm_page_lock_queues();
/*
* if the page is resident, then gather information about
* it.
*/
if (m) {
mincoreinfo = MINCORE_INCORE;
vm_page_lock_queues();
if (m->dirty ||
pmap_is_modified(m))
mincoreinfo |= MINCORE_MODIFIED_OTHER;
@ -920,8 +920,9 @@ mincore(td, uap)
vm_page_flag_set(m, PG_REFERENCED);
mincoreinfo |= MINCORE_REFERENCED_OTHER;
}
vm_page_unlock_queues();
}
vm_page_unlock_queues();
VM_OBJECT_UNLOCK(current->object.vm_object);
}
/*
@ -998,7 +999,6 @@ mincore(td, uap)
goto RestartScan;
vm_map_unlock_read(map);
done2:
mtx_unlock(&Giant);
return (error);
}