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Message-ID: <20151124060037.GI705@swordfish>
Date: Tue, 24 Nov 2015 15:00:37 +0900
From: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To: Minchan Kim <minchan@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org,
Kyeongdon Kim <kyeongdon.kim@....com>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [PATCH 1/3] zram/zcomp: use GFP_NOIO to allocate streams
[..]
> static struct zcomp_strm *zcomp_strm_alloc(struct zcomp *comp)
> {
> - struct zcomp_strm *zstrm = kmalloc(sizeof(*zstrm), GFP_KERNEL);
> + struct zcomp_strm *zstrm = kmalloc(sizeof(*zstrm), GFP_NOIO);
> if (!zstrm)
> return NULL;
>
> @@ -85,7 +85,7 @@ static struct zcomp_strm *zcomp_strm_alloc(struct zcomp *comp)
> * allocate 2 pages. 1 for compressed data, plus 1 extra for the
> * case when compressed size is larger than the original one
> */
> - zstrm->buffer = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
> + zstrm->buffer = (void *)__get_free_pages(GFP_NOIO | __GFP_ZERO, 1);
> if (!zstrm->private || !zstrm->buffer) {
> zcomp_strm_free(comp, zstrm);
> zstrm = NULL;
hm... this is not enough.
we allocate
stream GFP_NOIO
stream private GFP_KERNEL <<<< still old flags
stream buffer
so my patch was something like this:
---
drivers/block/zram/zcomp.c | 4 ++--
drivers/block/zram/zcomp_lz4.c | 2 +-
drivers/block/zram/zcomp_lzo.c | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
index 5cb13ca..c536177 100644
--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -76,7 +76,7 @@ static void zcomp_strm_free(struct zcomp *comp, struct zcomp_strm *zstrm)
*/
static struct zcomp_strm *zcomp_strm_alloc(struct zcomp *comp)
{
- struct zcomp_strm *zstrm = kmalloc(sizeof(*zstrm), GFP_KERNEL);
+ struct zcomp_strm *zstrm = kmalloc(sizeof(*zstrm), GFP_NOIO);
if (!zstrm)
return NULL;
@@ -85,7 +85,7 @@ static struct zcomp_strm *zcomp_strm_alloc(struct zcomp *comp)
* allocate 2 pages. 1 for compressed data, plus 1 extra for the
* case when compressed size is larger than the original one
*/
- zstrm->buffer = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
+ zstrm->buffer = (void *)__get_free_pages(GFP_NOIO | __GFP_ZERO, 1);
if (!zstrm->private || !zstrm->buffer) {
zcomp_strm_free(comp, zstrm);
zstrm = NULL;
diff --git a/drivers/block/zram/zcomp_lz4.c b/drivers/block/zram/zcomp_lz4.c
index f2afb7e..ee44b51 100644
--- a/drivers/block/zram/zcomp_lz4.c
+++ b/drivers/block/zram/zcomp_lz4.c
@@ -15,7 +15,7 @@
static void *zcomp_lz4_create(void)
{
- return kzalloc(LZ4_MEM_COMPRESS, GFP_KERNEL);
+ return kzalloc(LZ4_MEM_COMPRESS, GFP_NOIO);
}
static void zcomp_lz4_destroy(void *private)
diff --git a/drivers/block/zram/zcomp_lzo.c b/drivers/block/zram/zcomp_lzo.c
index da1bc47..683ce04 100644
--- a/drivers/block/zram/zcomp_lzo.c
+++ b/drivers/block/zram/zcomp_lzo.c
@@ -15,7 +15,7 @@
static void *lzo_create(void)
{
- return kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
+ return kzalloc(LZO1X_MEM_COMPRESS, GFP_NOIO);
}
static void lzo_destroy(void *private)
--
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