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nbd: Add the O_DIRECT flag when opening the file.

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To eliminate the cache issue.

Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Change-Id: Id67fabb901de9666e6bad04c9df74a538bdbc659
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/3662
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Sun Zhenyuan <sunzhenyuan@baidu.com>
This commit is contained in:
Ziye Yang 2020-08-05 00:09:09 +08:00 committed by Jim Harris
parent 7bac9b06f1
commit 4ba5e90176
1 changed files with 1 additions and 1 deletions
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2
lib/nbd/nbd.c
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@ -1060,7 +1060,7 @@ spdk_nbd_start(const char *bdev_name, const char *nbd_path,
goto err;
}
nbd->dev_fd = open(nbd_path, O_RDWR);
nbd->dev_fd = open(nbd_path, O_RDWR | O_DIRECT);
if (nbd->dev_fd == -1) {
SPDK_ERRLOG("open(\"%s\") failed: %s\n", nbd_path, spdk_strerror(errno));
rc = -errno;