From bc8136a543aa839a848b49af5e101ac6de5f6b27 Mon Sep 17 00:00:00 2001
From: Vasily Averin <vvs@virtuozzo.com>
Date: Wed, 30 Jun 2021 18:57:12 -0700
Subject: [PATCH] ipc: use kmalloc for msg_queue and shmid_kernel
msg_queue and shmid_kernel are quite small objects, no need to use
kvmalloc for them. mhocko@: "Both of them are 256B on most 64b systems."
Previously these objects was allocated via ipc_alloc/ipc_rcu_alloc(),
common function for several ipc objects. It had kvmalloc call inside().
Later, this function went away and was finally replaced by direct kvmalloc
call, and now we can use more suitable kmalloc/kfree for them.
Link: https://lkml.kernel.org/r/0d0b6c9b-8af3-29d8-34e2-a565c53780f3@virtuozzo.com
Reported-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
ipc/msg.c | 6 +++---
ipc/shm.c | 6 +++---
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/ipc/msg.c b/ipc/msg.c
index 6e6c8e0c9380e..6810276d6bb98 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -130,7 +130,7 @@ static void msg_rcu_free(struct rcu_head *head)
struct msg_queue *msq = container_of(p, struct msg_queue, q_perm);
security_msg_queue_free(&msq->q_perm);
- kvfree(msq);
+ kfree(msq);
}
/**
@@ -147,7 +147,7 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
key_t key = params->key;
int msgflg = params->flg;
- msq = kvmalloc(sizeof(*msq), GFP_KERNEL);
+ msq = kmalloc(sizeof(*msq), GFP_KERNEL);
if (unlikely(!msq))
return -ENOMEM;
@@ -157,7 +157,7 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
msq->q_perm.security = NULL;
retval = security_msg_queue_alloc(&msq->q_perm);
if (retval) {
- kvfree(msq);
+ kfree(msq);
return retval;
}
diff --git a/ipc/shm.c b/ipc/shm.c
index febd88daba8c6..a66b2664558b6 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -222,7 +222,7 @@ static void shm_rcu_free(struct rcu_head *head)
struct shmid_kernel *shp = container_of(ptr, struct shmid_kernel,
shm_perm);
security_shm_free(&shp->shm_perm);
- kvfree(shp);
+ kfree(shp);
}
static inline void shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *s)
@@ -619,7 +619,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
ns->shm_tot + numpages > ns->shm_ctlall)
return -ENOSPC;
- shp = kvmalloc(sizeof(*shp), GFP_KERNEL);
+ shp = kmalloc(sizeof(*shp), GFP_KERNEL);
if (unlikely(!shp))
return -ENOMEM;
@@ -630,7 +630,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
shp->shm_perm.security = NULL;
error = security_shm_alloc(&shp->shm_perm);
if (error) {
- kvfree(shp);
+ kfree(shp);
return error;
}
--
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