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sys/kern/uipc_shm.c
Show First 20 Lines • Show All 190 Lines • ▼ Show 20 Lines | uiomove_object_page(vm_object_t obj, size_t len, struct uio *uio) | ||||
if (m->valid != VM_PAGE_BITS_ALL) { | if (m->valid != VM_PAGE_BITS_ALL) { | ||||
vm_page_xbusy(m); | vm_page_xbusy(m); | ||||
if (vm_pager_has_page(obj, idx, NULL, NULL)) { | if (vm_pager_has_page(obj, idx, NULL, NULL)) { | ||||
rv = vm_pager_get_pages(obj, &m, 1, NULL, NULL); | rv = vm_pager_get_pages(obj, &m, 1, NULL, NULL); | ||||
if (rv != VM_PAGER_OK) { | if (rv != VM_PAGER_OK) { | ||||
printf( | printf( | ||||
"uiomove_object: vm_obj %p idx %jd valid %x pager error %d\n", | "uiomove_object: vm_obj %p idx %jd valid %x pager error %d\n", | ||||
obj, idx, m->valid, rv); | obj, idx, m->valid, rv); | ||||
vm_page_lock(m); | |||||
vm_page_free(m); | vm_page_free(m); | ||||
vm_page_unlock(m); | |||||
VM_OBJECT_WUNLOCK(obj); | VM_OBJECT_WUNLOCK(obj); | ||||
return (EIO); | return (EIO); | ||||
} | } | ||||
} else | } else | ||||
vm_page_zero_invalid(m, TRUE); | vm_page_zero_invalid(m, TRUE); | ||||
vm_page_xunbusy(m); | vm_page_xunbusy(m); | ||||
} | } | ||||
vm_page_lock(m); | |||||
vm_page_wire(m); | vm_page_wire(m); | ||||
vm_page_unlock(m); | |||||
VM_OBJECT_WUNLOCK(obj); | VM_OBJECT_WUNLOCK(obj); | ||||
error = uiomove_fromphys(&m, offset, tlen, uio); | error = uiomove_fromphys(&m, offset, tlen, uio); | ||||
if (uio->uio_rw == UIO_WRITE && error == 0) { | if (uio->uio_rw == UIO_WRITE && error == 0) { | ||||
VM_OBJECT_WLOCK(obj); | VM_OBJECT_WLOCK(obj); | ||||
vm_page_dirty(m); | vm_page_dirty(m); | ||||
vm_pager_page_unswapped(m); | vm_pager_page_unswapped(m); | ||||
VM_OBJECT_WUNLOCK(obj); | VM_OBJECT_WUNLOCK(obj); | ||||
} | } | ||||
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