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r283014: Disable unmapped I/O: it is broken for unaligned pages
r283126: Fix comments
This commit is contained in:
imp 2015-06-02 21:36:45 +00:00
parent a5587d67f9
commit 44bead40e5
1 changed files with 7 additions and 1 deletions
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8
sys/arm/arm/pmap.c
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@ -4324,7 +4324,13 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
pmap_copy_page_func(VM_PAGE_TO_PHYS(src), VM_PAGE_TO_PHYS(dst));
}
int unmapped_buf_allowed = 1;
/*
* We have code to do unmapped I/O. However, it isn't quite right and
* causes un-page-aligned I/O to devices to fail (most notably newfs
* or fsck). We give up a little performance to not allow unmapped I/O
* to gain stability.
*/
int unmapped_buf_allowed = 0;
void
pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],