search for: percpu_ida_init

...bits covered at each layer. 8 @@ -243,4 +245,55 @@ static inline int ida_get_new(struct ida *ida, int *p_id) void __init idr_init_cache(void); +/* Percpu IDA/tag allocator */ + +struct percpu_ida_cpu; + +struct percpu_ida { + /* + * number of tags available to be allocated, as passed to + * percpu_ida_init() + */ + unsigned nr_tags; + + struct percpu_ida_cpu __percpu *tag_cpu; + + /* + * Bitmap of cpus that (may) have tags on their percpu freelists: + * steal_tags() uses this to decide when to steal tags, and which cpus + * to try stealing from. + * + * It's ok for a freelist to be empty...

...+1408,6 @@ EXPORT_SYMBOL_GPL(percpu_ida_free); void percpu_ida_destroy(struct percpu_ida *pool) { free_percpu(pool->tag_cpu); - kfree(pool->cpus_have_tags); free_pages((unsigned long) pool->freelist, get_order(pool->nr_tags * sizeof(unsigned))); } @@ -1428,7 +1437,7 @@ int percpu_ida_init(struct percpu_ida *pool, unsigned long nr_tags) /* Guard against overflow */ if (nr_tags > (unsigned) INT_MAX + 1) { - pr_err("tags.c: nr_tags too large\n"); + pr_err("percpu_ida_init(): nr_tags too large\n"); return -EINVAL; } @@ -1442,11 +1451,6 @@ int percpu...

...tic inline int ida_get_new(struct ida *ida, int *p_id) > > void __init idr_init_cache(void); > > +/* Percpu IDA/tag allocator */ > + > +struct percpu_ida_cpu; > + > +struct percpu_ida { > + /* > + * number of tags available to be allocated, as passed to > + * percpu_ida_init() > + */ > + unsigned nr_tags; > + > + struct percpu_ida_cpu __percpu *tag_cpu; > + > + /* > + * Bitmap of cpus that (may) have tags on their percpu freelists: > + * steal_tags() uses this to decide when to steal tags, and which cpus > + * to try stealing from. >...

...tic inline int ida_get_new(struct ida *ida, int *p_id) > > void __init idr_init_cache(void); > > +/* Percpu IDA/tag allocator */ > + > +struct percpu_ida_cpu; > + > +struct percpu_ida { > + /* > + * number of tags available to be allocated, as passed to > + * percpu_ida_init() > + */ > + unsigned nr_tags; > + > + struct percpu_ida_cpu __percpu *tag_cpu; > + > + /* > + * Bitmap of cpus that (may) have tags on their percpu freelists: > + * steal_tags() uses this to decide when to steal tags, and which cpus > + * to try stealing from. >...

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi folks, This is an updated series for adding tag pre-allocation support of target fabric descriptor memory, utilizing Kent's latest per-cpu ida bits here, along with Christoph Lameter's latest comments: [PATCH 04/10] idr: Percpu ida http://marc.info/?l=linux-kernel&m=137160026006974&w=2 The first patch is a

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi folks, This is an updated series for adding tag pre-allocation support of target fabric descriptor memory, utilizing Kent's latest per-cpu ida bits here, along with Christoph Lameter's latest comments: [PATCH 04/10] idr: Percpu ida http://marc.info/?l=linux-kernel&m=137160026006974&w=2 The first patch is a

Removing the percpu_ida code nets over 400 lines of removal. It's not as spectacular as deleting an entire architecture, but it's still a worthy reduction in lines of code. Untested due to lack of hardware and not understanding how to set up a target platform. Changes from v1: - Fixed bugs pointed out by Jens in iscsit_wait_for_tag() - Abstracted out tag freeing as requested by Bart

Removing the percpu_ida code nets over 400 lines of removal. It's not as spectacular as deleting an entire architecture, but it's still a worthy reduction in lines of code. Untested due to lack of hardware and not understanding how to set up a target platform. Changes from v1: - Fixed bugs pointed out by Jens in iscsit_wait_for_tag() - Abstracted out tag freeing as requested by Bart

From: Matthew Wilcox <mawilcox at microsoft.com> This is a pretty rough-and-ready conversion of the target drivers from using percpu_ida to sbitmap. It compiles; I don't have a target setup, so it's completely untested. I haven't tried to do anything particularly clever here, so it's possible that, for example, the wait queue in iscsi_target_util could be more clever, like

...arget/target_core_transport.c b/drivers/target/target_core_transport.c index 4558f2e1fe1b..3103890ed109 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -260,7 +260,8 @@ int transport_alloc_session_tags(struct se_session *se_sess, } } - rc = percpu_ida_init(&se_sess->sess_tag_pool, tag_num); + rc = sbitmap_queue_init_node(&se_sess->sess_tag_pool, tag_num, -1, + false, GFP_KERNEL, NUMA_NO_NODE); if (rc < 0) { pr_err("Unable to init se_sess->sess_tag_pool," " tag_num: %u\n", tag_num); @@ -547,7 +548,7 @...

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi folks, This is an updated series for adding tag pre-allocation support of target fabric descriptor memory, utilizing Kent's latest in-flight per-cpu ida bits here: [PATCH v3] lib/idr.c rewrite, percpu ida/tag allocator http://marc.info/?l=linux-kernel&m=137308733526328&w=2 Patch #1 includes target-core setup of

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi folks, This is an updated series for adding tag pre-allocation support of target fabric descriptor memory, utilizing Kent's latest in-flight per-cpu ida bits here: [PATCH v3] lib/idr.c rewrite, percpu ida/tag allocator http://marc.info/?l=linux-kernel&m=137308733526328&w=2 Patch #1 includes target-core setup of