Author: alc
Date: Sun Dec 11 19:24:41 2016
New Revision: 309855
URL: https://svnweb.freebsd.org/changeset/base/309855
Log:
When tmpfs and POSIX shm pagein a page for the sole purpose of performing
truncation, immediately queue the page for asynchronous laundering rather
than making the page pass through inactive queue first.
Reviewed by: kib, markj
Modified:
head/sys/fs/tmpfs/tmpfs_subr.c
head/sys/kern/uipc_shm.c
Modified: head/sys/fs/tmpfs/tmpfs_subr.c
==============================================================================
--- head/sys/fs/tmpfs/tmpfs_subr.c Sun Dec 11 19:01:27 2016
(r309854)
+++ head/sys/fs/tmpfs/tmpfs_subr.c Sun Dec 11 19:24:41 2016
(r309855)
@@ -1376,7 +1376,15 @@ retry:
NULL);
vm_page_lock(m);
if (rv == VM_PAGER_OK) {
- vm_page_deactivate(m);
+ /*
+ * Since the page was not resident,
+ * and therefore not recently
+ * accessed, immediately enqueue it
+ * for asynchronous laundering. The
+ * current operation is not regarded
+ * as an access.
+ */
+ vm_page_launder(m);
vm_page_unlock(m);
vm_page_xunbusy(m);
} else {
Modified: head/sys/kern/uipc_shm.c
==============================================================================
--- head/sys/kern/uipc_shm.c Sun Dec 11 19:01:27 2016 (r309854)
+++ head/sys/kern/uipc_shm.c Sun Dec 11 19:24:41 2016 (r309855)
@@ -460,7 +460,15 @@ retry:
NULL);
vm_page_lock(m);
if (rv == VM_PAGER_OK) {
- vm_page_deactivate(m);
+ /*
+ * Since the page was not resident,
+ * and therefore not recently
+ * accessed, immediately enqueue it
+ * for asynchronous laundering. The
+ * current operation is not regarded
+ * as an access.
+ */
+ vm_page_launder(m);
vm_page_unlock(m);
vm_page_xunbusy(m);
} else {
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