Date: Mon, 18 Sep 2017 13:23:59 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r323704 - in head/sys/compat/linuxkpi/common: include/linux src Message-ID: <201709181323.v8IDNxB6056215@repo.freebsd.org>
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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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