* [merged] zsmalloc-switch-from-alloc_vm_area-to-get_vm_area.patch removed from -mm tree
@ 2020-10-22 23:10 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2020-10-22 23:10 UTC (permalink / raw)
To: boris.ostrovsky, chris, hch, jani.nikula, jgross,
joonas.lahtinen, matthew.auld, minchan, mm-commits, ngupta,
peterz, rodrigo.vivi, sstabellini, tvrtko.ursulin, urezki, willy
The patch titled
Subject: zsmalloc: switch from alloc_vm_area to get_vm_area
has been removed from the -mm tree. Its filename was
zsmalloc-switch-from-alloc_vm_area-to-get_vm_area.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Christoph Hellwig <hch@lst.de>
Subject: zsmalloc: switch from alloc_vm_area to get_vm_area
Just manually pre-fault the PTEs using apply_to_page_range.
Link: https://lkml.kernel.org/r/20201002122204.1534411-6-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Co-developed-by: Minchan Kim <minchan@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/zsmalloc.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/mm/zsmalloc.c~zsmalloc-switch-from-alloc_vm_area-to-get_vm_area
+++ a/mm/zsmalloc.c
@@ -1122,10 +1122,16 @@ static inline int __zs_cpu_up(struct map
*/
if (area->vm)
return 0;
- area->vm = alloc_vm_area(PAGE_SIZE * 2, NULL);
+ area->vm = get_vm_area(PAGE_SIZE * 2, 0);
if (!area->vm)
return -ENOMEM;
- return 0;
+
+ /*
+ * Populate ptes in advance to avoid pte allocation with GFP_KERNEL
+ * in non-preemtible context of zs_map_object.
+ */
+ return apply_to_page_range(&init_mm, (unsigned long)area->vm->addr,
+ PAGE_SIZE * 2, NULL, NULL);
}
static inline void __zs_cpu_down(struct mapping_area *area)
_
Patches currently in -mm which might be from hch@lst.de are
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2020-10-22 23:10 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-22 23:10 [merged] zsmalloc-switch-from-alloc_vm_area-to-get_vm_area.patch removed from -mm tree akpm
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).