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authorDavid Rientjes <rientjes@google.com>2015-04-15 01:48:21 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-15 02:49:06 +0300
commit11d83360452ea2a95e699da01f8e1bcc4676a5de (patch)
tree22d85ebbc47a9152cafc9373a8300d0abf92106b /fs/cifs/connect.c
parent2415b9f5cb048a803b30b790af994ba71ff0bd4c (diff)
downloadlinux-11d83360452ea2a95e699da01f8e1bcc4676a5de.tar.xz
mm, mempool: do not allow atomic resizing
Allocating a large number of elements in atomic context could quickly deplete memory reserves, so just disallow atomic resizing entirely. Nothing currently uses mempool_resize() with anything other than GFP_KERNEL, so convert existing callers to drop the gfp_mask. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: Steffen Maier <maier@linux.vnet.ibm.com> [zfcp] Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Steve French <sfrench@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/cifs/connect.c')
-rw-r--r--fs/cifs/connect.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 480cf9c81d50..f3bfe08e177b 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -773,8 +773,7 @@ static void clean_demultiplex_info(struct TCP_Server_Info *server)
length = atomic_dec_return(&tcpSesAllocCount);
if (length > 0)
- mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
- GFP_KERNEL);
+ mempool_resize(cifs_req_poolp, length + cifs_min_rcv);
}
static int
@@ -848,8 +847,7 @@ cifs_demultiplex_thread(void *p)
length = atomic_inc_return(&tcpSesAllocCount);
if (length > 1)
- mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
- GFP_KERNEL);
+ mempool_resize(cifs_req_poolp, length + cifs_min_rcv);
set_freezable();
while (server->tcpStatus != CifsExiting) {