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Disable preemption when accessing current cpu id

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Currently Open CAS doesn't support kernels with involuntary preemption
anyways and once we add the support, we can get rid of this workaround

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@huawei.com>
This commit is contained in:
Michal Mielewczyk
2025-03-25 14:34:22 +01:00
parent debbfcc0d1
commit b1f61580fc
3 changed files with 26 additions and 6 deletions
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18
modules/cas_cache/volume/vol_block_dev_top.c
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@@ -248,12 +248,16 @@ static int blkdev_handle_data_single(struct bd_object *bvol, struct bio *bio,
{
ocf_cache_t cache = ocf_volume_get_cache(bvol->front_volume);
struct cache_priv *cache_priv = ocf_cache_get_priv(cache);
ocf_queue_t queue = cache_priv->io_queues[smp_processor_id()];
ocf_queue_t queue;
ocf_io_t io;
struct blk_data *data;
uint64_t flags = CAS_BIO_OP_FLAGS(bio);
int ret;
get_cpu();
queue = cache_priv->io_queues[smp_processor_id()];
put_cpu();
data = cas_alloc_blk_data(bio_segments(bio), GFP_NOIO);
if (!data) {
CAS_PRINT_RL(KERN_CRIT "BIO data vector allocation error\n");
@@ -363,9 +367,13 @@ static void blkdev_handle_discard(struct bd_object *bvol, struct bio *bio)
{
ocf_cache_t cache = ocf_volume_get_cache(bvol->front_volume);
struct cache_priv *cache_priv = ocf_cache_get_priv(cache);
ocf_queue_t queue = cache_priv->io_queues[smp_processor_id()];
ocf_queue_t queue;
ocf_io_t io;
get_cpu();
queue = cache_priv->io_queues[smp_processor_id()];
put_cpu();
io = ocf_volume_new_io(bvol->front_volume, queue,
CAS_BIO_BISECTOR(bio) << SECTOR_SHIFT,
CAS_BIO_BISIZE(bio), OCF_WRITE, 0, 0);
@@ -411,9 +419,13 @@ static void blkdev_handle_flush(struct bd_object *bvol, struct bio *bio)
{
ocf_cache_t cache = ocf_volume_get_cache(bvol->front_volume);
struct cache_priv *cache_priv = ocf_cache_get_priv(cache);
ocf_queue_t queue = cache_priv->io_queues[smp_processor_id()];
ocf_queue_t queue;
ocf_io_t io;
get_cpu();
queue = cache_priv->io_queues[smp_processor_id()];
put_cpu();
io = ocf_volume_new_io(bvol->front_volume, queue, 0, 0, OCF_WRITE, 0,
CAS_SET_FLUSH(0));
if (!io) {