From: Seth Jennings <sjenning@linux.vnet.ibm.com> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>, Andrew Morton <akpm@linux-foundation.org>, Dan Magenheimer <dan.magenheimer@oracle.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Nitin Gupta <ngupta@vflare.org>, Minchan Kim <minchan@kernel.org>, Robert Jennings <rcj@linux.vnet.ibm.com>, linux-mm@kvack.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/4] zsmalloc: add details to zs_map_object boiler plate Date: Mon, 2 Jul 2012 16:15:51 -0500 [thread overview] Message-ID: <1341263752-10210-4-git-send-email-sjenning@linux.vnet.ibm.com> (raw) In-Reply-To: <1341263752-10210-1-git-send-email-sjenning@linux.vnet.ibm.com> Add information on the usage limits of zs_map_object() Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com> --- drivers/staging/zsmalloc/zsmalloc-main.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c index 4942d41..abf7c13 100644 --- a/drivers/staging/zsmalloc/zsmalloc-main.c +++ b/drivers/staging/zsmalloc/zsmalloc-main.c @@ -747,7 +747,12 @@ EXPORT_SYMBOL_GPL(zs_free); * * Before using an object allocated from zs_malloc, it must be mapped using * this function. When done with the object, it must be unmapped using - * zs_unmap_object + * zs_unmap_object. + * + * Only one object can be mapped per cpu at a time. There is no protection + * against nested mappings. + * + * This function returns with preemption and page faults disabled. */ void *zs_map_object(struct zs_pool *pool, unsigned long handle) { -- 1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: Seth Jennings <sjenning@linux.vnet.ibm.com> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>, Andrew Morton <akpm@linux-foundation.org>, Dan Magenheimer <dan.magenheimer@oracle.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Nitin Gupta <ngupta@vflare.org>, Minchan Kim <minchan@kernel.org>, Robert Jennings <rcj@linux.vnet.ibm.com>, linux-mm@kvack.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/4] zsmalloc: add details to zs_map_object boiler plate Date: Mon, 2 Jul 2012 16:15:51 -0500 [thread overview] Message-ID: <1341263752-10210-4-git-send-email-sjenning@linux.vnet.ibm.com> (raw) In-Reply-To: <1341263752-10210-1-git-send-email-sjenning@linux.vnet.ibm.com> Add information on the usage limits of zs_map_object() Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com> --- drivers/staging/zsmalloc/zsmalloc-main.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c index 4942d41..abf7c13 100644 --- a/drivers/staging/zsmalloc/zsmalloc-main.c +++ b/drivers/staging/zsmalloc/zsmalloc-main.c @@ -747,7 +747,12 @@ EXPORT_SYMBOL_GPL(zs_free); * * Before using an object allocated from zs_malloc, it must be mapped using * this function. When done with the object, it must be unmapped using - * zs_unmap_object + * zs_unmap_object. + * + * Only one object can be mapped per cpu at a time. There is no protection + * against nested mappings. + * + * This function returns with preemption and page faults disabled. */ void *zs_map_object(struct zs_pool *pool, unsigned long handle) { -- 1.7.9.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2012-07-02 21:16 UTC|newest] Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-07-02 21:15 [PATCH 0/4] zsmalloc improvements Seth Jennings 2012-07-02 21:15 ` Seth Jennings 2012-07-02 21:15 ` [PATCH 1/4] zsmalloc: remove x86 dependency Seth Jennings 2012-07-02 21:15 ` Seth Jennings 2012-07-10 2:21 ` Minchan Kim 2012-07-10 2:21 ` Minchan Kim 2012-07-10 15:29 ` Seth Jennings 2012-07-10 15:29 ` Seth Jennings 2012-07-11 7:27 ` Minchan Kim 2012-07-11 7:27 ` Minchan Kim 2012-07-11 18:26 ` Nitin Gupta 2012-07-11 18:26 ` Nitin Gupta 2012-07-11 20:32 ` Seth Jennings 2012-07-11 20:32 ` Seth Jennings 2012-07-11 22:42 ` Nitin Gupta 2012-07-11 22:42 ` Nitin Gupta 2012-07-12 0:23 ` Seth Jennings 2012-07-12 0:23 ` Seth Jennings 2012-07-02 21:15 ` [PATCH 2/4] zsmalloc: add single-page object fastpath in unmap Seth Jennings 2012-07-02 21:15 ` Seth Jennings 2012-07-10 2:25 ` Minchan Kim 2012-07-10 2:25 ` Minchan Kim 2012-07-02 21:15 ` Seth Jennings [this message] 2012-07-02 21:15 ` [PATCH 3/4] zsmalloc: add details to zs_map_object boiler plate Seth Jennings 2012-07-10 2:35 ` Minchan Kim 2012-07-10 2:35 ` Minchan Kim 2012-07-10 15:17 ` Seth Jennings 2012-07-10 15:17 ` Seth Jennings 2012-07-11 7:42 ` Minchan Kim 2012-07-11 7:42 ` Minchan Kim 2012-07-11 14:15 ` Seth Jennings 2012-07-11 14:15 ` Seth Jennings 2012-07-12 1:15 ` Minchan Kim 2012-07-12 1:15 ` Minchan Kim 2012-07-12 19:54 ` Dan Magenheimer 2012-07-12 19:54 ` Dan Magenheimer 2012-07-12 22:46 ` Dan Magenheimer 2012-07-12 22:46 ` Dan Magenheimer 2012-07-02 21:15 ` [PATCH 4/4] zsmalloc: add mapping modes Seth Jennings 2012-07-02 21:15 ` Seth Jennings 2012-07-04 5:33 ` [PATCH 0/4] zsmalloc improvements Minchan Kim 2012-07-04 5:33 ` Minchan Kim 2012-07-04 20:43 ` Konrad Rzeszutek Wilk 2012-07-04 20:43 ` Konrad Rzeszutek Wilk 2012-07-06 15:07 ` Seth Jennings 2012-07-06 15:07 ` Seth Jennings 2012-07-09 13:58 ` Seth Jennings 2012-07-09 13:58 ` Seth Jennings 2012-07-11 19:42 ` Konrad Rzeszutek Wilk 2012-07-11 19:42 ` Konrad Rzeszutek Wilk 2012-07-11 20:48 ` Seth Jennings 2012-07-11 20:48 ` Seth Jennings 2012-07-12 10:40 ` Konrad Rzeszutek Wilk 2012-07-12 10:40 ` Konrad Rzeszutek Wilk 2012-07-11 7:03 ` Minchan Kim 2012-07-11 7:03 ` Minchan Kim 2012-07-11 14:00 ` Seth Jennings 2012-07-11 14:00 ` Seth Jennings 2012-07-12 1:01 ` Minchan Kim 2012-07-12 1:01 ` Minchan Kim 2012-07-11 19:16 ` Seth Jennings 2012-07-11 19:16 ` Seth Jennings
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