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bdev: Factor out spdk_bdev_io_complete

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Split part of IO completion into 2 functions.
This patch reduces changes in the next patch
which will reuse some part of spdk_bdev_io_complete

Signed-off-by: Alexey Marchuk <alexeymar@mellanox.com>
Change-Id: Iaeac81aa5208b4ca303f60410b6a54f8df13b069
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11519
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Alexey Marchuk 2022-02-10 19:39:30 +03:00 committed by Jim Harris
parent 52d1cb5003
commit 9cd85928e5
1 changed files with 38 additions and 20 deletions
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58
lib/bdev/bdev.c
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@ -1016,6 +1016,42 @@ bdev_ch_retry_io(struct spdk_bdev_channel *bdev_ch)
}
}
static inline void
_bdev_io_decrement_outstanding(struct spdk_bdev_channel *bdev_ch,
struct spdk_bdev_shared_resource *shared_resource)
{
assert(bdev_ch->io_outstanding > 0);
assert(shared_resource->io_outstanding > 0);
bdev_ch->io_outstanding--;
shared_resource->io_outstanding--;
}
static inline bool
_bdev_io_handle_no_mem(struct spdk_bdev_io *bdev_io)
{
struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
if (spdk_unlikely(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM)) {
TAILQ_INSERT_HEAD(&shared_resource->nomem_io, bdev_io, internal.link);
/*
* Wait for some of the outstanding I/O to complete before we
* retry any of the nomem_io. Normally we will wait for
* NOMEM_THRESHOLD_COUNT I/O to complete but for low queue
* depth channels we will instead wait for half to complete.
*/
shared_resource->nomem_threshold = spdk_max((int64_t)shared_resource->io_outstanding / 2,
(int64_t)shared_resource->io_outstanding - NOMEM_THRESHOLD_COUNT);
return true;
}
if (spdk_unlikely(!TAILQ_EMPTY(&shared_resource->nomem_io))) {
bdev_ch_retry_io(bdev_ch);
}
return false;
}
static void
_bdev_io_unset_bounce_buf(struct spdk_bdev_io *bdev_io)
{
@ -5510,28 +5546,10 @@ spdk_bdev_io_complete(struct spdk_bdev_io *bdev_io, enum spdk_bdev_io_status sta
}
} else {
_bdev_io_unset_bounce_buf(bdev_io);
assert(bdev_ch->io_outstanding > 0);
assert(shared_resource->io_outstanding > 0);
bdev_ch->io_outstanding--;
shared_resource->io_outstanding--;
if (spdk_unlikely(status == SPDK_BDEV_IO_STATUS_NOMEM)) {
TAILQ_INSERT_HEAD(&shared_resource->nomem_io, bdev_io, internal.link);
/*
* Wait for some of the outstanding I/O to complete before we
* retry any of the nomem_io. Normally we will wait for
* NOMEM_THRESHOLD_COUNT I/O to complete but for low queue
* depth channels we will instead wait for half to complete.
*/
shared_resource->nomem_threshold = spdk_max((int64_t)shared_resource->io_outstanding / 2,
(int64_t)shared_resource->io_outstanding - NOMEM_THRESHOLD_COUNT);
_bdev_io_decrement_outstanding(bdev_ch, shared_resource);
if (spdk_unlikely(_bdev_io_handle_no_mem(bdev_io))) {
return;
}
if (spdk_unlikely(!TAILQ_EMPTY(&shared_resource->nomem_io))) {
bdev_ch_retry_io(bdev_ch);
}
}
bdev_io_complete(bdev_io);