diff options
| author | Thomas Bushnell <thomas@gnu.org> | 1999-06-29 23:34:14 +0000 |
|---|---|---|
| committer | Thomas Bushnell <thomas@gnu.org> | 1999-06-29 23:34:14 +0000 |
| commit | 9b4552a22d3abb08bb25f4e0035b164fce358d99 (patch) | |
| tree | 20f5b5ad90539d71e20b3cefa85c409de6949bb1 | |
| parent | c800de6a35683e6984124fdb4f8392f6b6991627 (diff) | |
1999-06-29 Thomas Bushnell, BSG <tb@mit.edu>
* vm/vm_resident.c (vm_page_grab): Don't bounce requests when
vm_page_external_count == vm_page_external_limit, so that before
initialization is complete we can still allocate memory without
relying on current_thread.
(vm_page_wait): Also block if we are over the external page
limit.
* vm/vm_pageout.c (vm_pageout_scan): Rewrite the
scan-for-pages-to-pageout loop to not crash when we hit the end of
the inactive queue; instead jump back to the
pause-for-a-little-while code.
| -rw-r--r-- | vm/vm_pageout.c | 22 | ||||
| -rw-r--r-- | vm/vm_resident.c | 3 |
2 files changed, 19 insertions, 6 deletions
diff --git a/vm/vm_pageout.c b/vm/vm_pageout.c index 1a986b4..af605ac 100644 --- a/vm/vm_pageout.c +++ b/vm/vm_pageout.c @@ -658,7 +658,7 @@ void vm_pageout_scan() * consumes memory. We don't take the risk of doing * this if the default pager already has work to do. */ - + pause: if (queue_empty(&vm_page_queue_inactive) || (burst_count >= vm_pageout_burst_max) || (vm_page_laundry_count >= vm_pageout_burst_max) || @@ -701,10 +701,22 @@ void vm_pageout_scan() } vm_pageout_inactive++; - for (m = (vm_page_t) queue_first(&vm_page_queue_inactive); - want_pages || m->external; - m = queue_next(m)) - assert(!m->active && m->inactive); + + /* Find a page we are interested in paging out. If we + need pages, then we'll page anything out; otherwise + we only page out external pages. */ + m = (vm_page_t) queue_first (&vm_page_queue_inactive); + while (1) + { + assert (!m->active && m->inactive); + if (want_pages || m->external) + break; + + m = (vm_page_t) queue_next (m); + if (!m) + goto pause; + } + object = m->object; /* diff --git a/vm/vm_resident.c b/vm/vm_resident.c index 58d9827..f9441ad 100644 --- a/vm/vm_resident.c +++ b/vm/vm_resident.c @@ -1212,7 +1212,8 @@ void vm_page_wait( */ simple_lock(&vm_page_queue_free_lock); - if (vm_page_free_count < vm_page_free_target) { + if ((vm_page_free_count < vm_page_free_target) + || (vm_page_external_count > vm_page_external_limit)) { if (vm_page_free_wanted++ == 0) thread_wakeup((event_t)&vm_page_free_wanted); assert_wait((event_t)&vm_page_free_count, FALSE); |