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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2017-09-06 12:15:31 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-09-11 12:29:38 -0400 |
| commit | 30f92d62e5b41a94de2d0bbd677a6ea2fcfed74f (patch) | |
| tree | 660a37a0ab5e90cda0ed1433570e2ec49a10114c /drivers/nvme | |
| parent | 92dc689563170b90ba844b8a2eb95e8a5eda2e83 (diff) | |
| download | blackbird-obmc-linux-30f92d62e5b41a94de2d0bbd677a6ea2fcfed74f.tar.gz blackbird-obmc-linux-30f92d62e5b41a94de2d0bbd677a6ea2fcfed74f.zip | |
nvme-pci: use appropriate initial chunk size for HMB allocation
The initial chunk size for host memory buffer allocation is currently
PAGE_SIZE << MAX_ORDER. MAX_ORDER order allocation is usually failed
without CONFIG_DMA_CMA. So the HMB allocation is retried with chunk size
PAGE_SIZE << (MAX_ORDER - 1) in general, but there is no problem if the
retry allocation works correctly.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
[hch: rebased]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/pci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 82e23c867e42..a370f702fceb 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1680,7 +1680,7 @@ static int nvme_alloc_host_mem(struct nvme_dev *dev, u64 min, u64 preferred) u32 chunk_size; /* start big and work our way down */ - for (chunk_size = min_t(u64, preferred, PAGE_SIZE << MAX_ORDER); + for (chunk_size = min_t(u64, preferred, PAGE_SIZE * MAX_ORDER_NR_PAGES); chunk_size >= PAGE_SIZE * 2; chunk_size /= 2) { if (!__nvme_alloc_host_mem(dev, preferred, chunk_size)) { |
