The patch titled
From: Shakeel Butt <shakeelb@xxxxxxxxxx>
has been added to the -mm tree. Its filename is
percpu-plumb-gfp-flag-to-pcpu_get_pages.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/percpu-plumb-gfp-flag-to-pcpu_get_pages.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/percpu-plumb-gfp-flag-to-pcpu_get_pages.patch
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------------------------------------------------------
From: Shakeel Butt <shakeelb@xxxxxxxxxx>
Subject: percpu: plumb gfp flag to pcpu_get_pages
__alloc_percpu_gfp() can be called from atomic context, so, make
pcpu_get_pages use the gfp provided to the higher layer.
Link: http://lkml.kernel.org/r/20181229013147.211079-1-shakeelb@xxxxxxxxxx
Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Dennis Zhou <dennis@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/percpu-vm.c~percpu-plumb-gfp-flag-to-pcpu_get_pages
+++ a/mm/percpu-vm.c
@@ -21,6 +21,7 @@ static struct page *pcpu_chunk_page(stru
/**
* pcpu_get_pages - get temp pages array
+ * @gfp: allocation flags passed to the underlying allocator
*
* Returns pointer to array of pointers to struct page which can be indexed
* with pcpu_page_idx(). Note that there is only one array and accesses
@@ -29,7 +30,7 @@ static struct page *pcpu_chunk_page(stru
* RETURNS:
* Pointer to temp pages array on success.
*/
-static struct page **pcpu_get_pages(void)
+static struct page **pcpu_get_pages(gfp_t gfp)
{
static struct page **pages;
size_t pages_size = pcpu_nr_units * pcpu_unit_pages * sizeof(pages[0]);
@@ -37,7 +38,7 @@ static struct page **pcpu_get_pages(void
lockdep_assert_held(&pcpu_alloc_mutex);
if (!pages)
- pages = pcpu_mem_zalloc(pages_size, GFP_KERNEL);
+ pages = pcpu_mem_zalloc(pages_size, gfp);
return pages;
}
@@ -278,7 +279,7 @@ static int pcpu_populate_chunk(struct pc
{
struct page **pages;
- pages = pcpu_get_pages();
+ pages = pcpu_get_pages(gfp);
if (!pages)
return -ENOMEM;
@@ -316,7 +317,7 @@ static void pcpu_depopulate_chunk(struct
* successful population attempt so the temp pages array must
* be available now.
*/
- pages = pcpu_get_pages();
+ pages = pcpu_get_pages(GFP_KERNEL);
BUG_ON(!pages);
/* unmap and free */
_
Patches currently in -mm which might be from shakeelb@xxxxxxxxxx are
percpu-plumb-gfp-flag-to-pcpu_get_pages.patch
