Author: hselasky
Date: Mon Sep 18 13:23:59 2017
New Revision: 323704
URL: https://svnweb.freebsd.org/changeset/base/323704
Log:
Only wire pages in the LinuxKPI instead of holding and wiring them.
This prevents the page daemon from regularly scanning the held pages.
Suggested by: kib @
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/compat/linuxkpi/common/include/linux/mm.h
head/sys/compat/linuxkpi/common/src/linux_page.c
Modified: head/sys/compat/linuxkpi/common/include/linux/mm.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/linux/mm.h Mon Sep 18 13:17:23
2017 (r323703)
+++ head/sys/compat/linuxkpi/common/include/linux/mm.h Mon Sep 18 13:23:59
2017 (r323704)
@@ -220,7 +220,6 @@ static inline void
get_page(struct vm_page *page)
{
vm_page_lock(page);
- vm_page_hold(page);
vm_page_wire(page);
vm_page_unlock(page);
}
@@ -245,7 +244,6 @@ put_page(struct vm_page *page)
{
vm_page_lock(page);
vm_page_unwire(page, PQ_ACTIVE);
- vm_page_unhold(page);
vm_page_unlock(page);
}
Modified: head/sys/compat/linuxkpi/common/src/linux_page.c
==============================================================================
--- head/sys/compat/linuxkpi/common/src/linux_page.c Mon Sep 18 13:17:23
2017 (r323703)
+++ head/sys/compat/linuxkpi/common/src/linux_page.c Mon Sep 18 13:23:59
2017 (r323704)
@@ -209,6 +209,7 @@ linux_get_user_pages_internal(vm_map_t map, unsigned l
vm_page_lock(pg);
vm_page_wire(pg);
+ vm_page_unhold(pg);
vm_page_unlock(pg);
}
return (nr_pages);
@@ -243,6 +244,7 @@ __get_user_pages_fast(unsigned long start, int nr_page
vm_page_lock(*mp);
vm_page_wire(*mp);
+ vm_page_unhold(*mp);
vm_page_unlock(*mp);
if ((prot & VM_PROT_WRITE) != 0 &&
@@ -323,9 +325,6 @@ linux_shmem_read_mapping_page_gfp(vm_object_t obj, int
}
vm_page_xunbusy(page);
}
- vm_page_lock(page);
- vm_page_hold(page);
- vm_page_unlock(page);
VM_OBJECT_WUNLOCK(obj);
return (page);
}
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