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Supporting flushing the dump before returning, and simplify/combine the

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logic.  Switch to a 5us delay since most NVME devices can easily do 200,000
iops.

Submitted by:	imp
MFC after:	3 days
Sponsored by:	Netflix, Inc.
This commit is contained in:
Scott Long 2016-07-19 19:09:23 +00:00
parent ddda1a9c2f
commit 49e20d2420
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=303040
2 changed files with 9 additions and 17 deletions
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9
sys/dev/nvd/nvd.c
View File

@ -237,14 +237,7 @@ nvd_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
dp = arg;
ndisk = dp->d_drv1;
if (len > 0) {
if ((error = nvme_ns_dump(ndisk->ns, virt, offset, len)) != 0)
return (error);
} else {
/* XXX sync to stable storage */
}
return (0);
return (nvme_ns_dump(ndisk->ns, virt, offset, len));
}
static void

17
sys/dev/nvme/nvme_ns_cmd.c
View File

@ -153,7 +153,7 @@ nvme_ns_cmd_flush(struct nvme_namespace *ns, nvme_cb_fn_t cb_fn, void *cb_arg)
}
/* Timeout = 1 sec */
#define NVD_DUMP_TIMEOUT 100000
#define NVD_DUMP_TIMEOUT 200000
int
nvme_ns_dump(struct nvme_namespace *ns, void *virt, off_t offset, size_t len)
@ -171,14 +171,13 @@ nvme_ns_dump(struct nvme_namespace *ns, void *virt, off_t offset, size_t len)
return (ENOMEM);
cmd = &req->cmd;
cmd->opc = NVME_OPC_WRITE;
cmd->nsid = ns->id;
lba = offset / nvme_ns_get_sector_size(ns);
lba_count = len / nvme_ns_get_sector_size(ns);
*(uint64_t *)&cmd->cdw10 = lba;
cmd->cdw12 = lba_count - 1;
if (len > 0) {
lba = offset / nvme_ns_get_sector_size(ns);
lba_count = len / nvme_ns_get_sector_size(ns);
nvme_ns_write_cmd(cmd, ns->id, lba, lba_count);
} else
nvme_ns_flush_cmd(cmd, ns->id);
nvme_ctrlr_submit_io_request(ns->ctrlr, req);
if (req->qpair == NULL)
@ -186,7 +185,7 @@ nvme_ns_dump(struct nvme_namespace *ns, void *virt, off_t offset, size_t len)
i = 0;
while ((i++ < NVD_DUMP_TIMEOUT) && (status.done == FALSE)) {
DELAY(10);
DELAY(5);
nvme_qpair_process_completions(req->qpair);
}