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authorChristophe JAILLET <christophe.jaillet@wanadoo.fr>2023-04-27 21:47:45 +0200
committerKeith Busch <kbusch@kernel.org>2023-06-21 09:41:40 -0700
commit9d16d264775b9a10f3f5b5db768d7f51294b2a63 (patch)
tree56587c5e6fca7547284f60f6db11fe736f940e78 /drivers/nvme
parentd0dd594bedc57f9be2af2af170bf56f9c3f2376e (diff)
nvmet: Reorder fields in 'struct nvmet_ns'
Group some variables based on their sizes to reduce holes. On x86_64, this shrinks the size of 'struct nvmet_ns' from 520 to 512 bytes. When such a structure is allocated in nvmet_ns_alloc(), because of the way memory allocation works, when 520 bytes were requested, 1024 bytes were allocated. So, on x86_64, this change saves 512 bytes per allocation. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/target/nvmet.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index 6cf723bc664e..8cfd60f3b564 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -79,8 +79,8 @@ struct nvmet_ns {
struct completion disable_done;
mempool_t *bvec_pool;
- int use_p2pmem;
struct pci_dev *p2p_dev;
+ int use_p2pmem;
int pi_type;
int metadata_size;
u8 csi;