| Message ID | 20230906163844.18754-13-nj.shetty@samsung.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Delegated to: | Mike Snitzer |
| Headers | show |
| Series | Implement copy offload support | expand |
Hi Nitesh, kernel test robot noticed the following build warnings: [auto build test WARNING on c50216cfa084d5eb67dc10e646a3283da1595bb6] url: https://github.com/intel-lab-lkp/linux/commits/Nitesh-Shetty/block-Introduce-queue-limits-and-sysfs-for-copy-offload-support/20230907-015817 base: c50216cfa084d5eb67dc10e646a3283da1595bb6 patch link: https://lore.kernel.org/r/20230906163844.18754-13-nj.shetty%40samsung.com patch subject: [PATCH v15 12/12] null_blk: add support for copy offload config: arm-randconfig-001-20230907 (https://download.01.org/0day-ci/archive/20230907/202309070542.P9utuu9p-lkp@intel.com/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230907/202309070542.P9utuu9p-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202309070542.P9utuu9p-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from drivers/block/null_blk/main.c:15: In file included from drivers/block/null_blk/./trace.h:104: In file included from include/trace/define_trace.h:102: In file included from include/trace/trace_events.h:237: >> drivers/block/null_blk/./trace.h:94:34: warning: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Wformat] __entry->dst, __entry->src, __entry->len) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ include/trace/stages/stage3_trace_output.h:6:17: note: expanded from macro '__entry' #define __entry field ^ include/trace/stages/stage3_trace_output.h:9:43: note: expanded from macro 'TP_printk' #define TP_printk(fmt, args...) fmt "\n", args ~~~ ^ include/trace/trace_events.h:45:16: note: expanded from macro 'TRACE_EVENT' PARAMS(print)); \ ~~~~~~~^~~~~~~ include/linux/tracepoint.h:107:25: note: expanded from macro 'PARAMS' #define PARAMS(args...) args ^~~~ include/trace/trace_events.h:203:27: note: expanded from macro 'DECLARE_EVENT_CLASS' trace_event_printf(iter, print); \ ^~~~~ 1 warning generated. vim +94 drivers/block/null_blk/./trace.h 72 73 TRACE_EVENT(nullb_copy_op, 74 TP_PROTO(struct request *req, 75 sector_t dst, sector_t src, size_t len), 76 TP_ARGS(req, dst, src, len), 77 TP_STRUCT__entry( 78 __array(char, disk, DISK_NAME_LEN) 79 __field(enum req_op, op) 80 __field(sector_t, dst) 81 __field(sector_t, src) 82 __field(size_t, len) 83 ), 84 TP_fast_assign( 85 __entry->op = req_op(req); 86 __assign_disk_name(__entry->disk, req->q->disk); 87 __entry->dst = dst; 88 __entry->src = src; 89 __entry->len = len; 90 ), 91 TP_printk("%s req=%-15s: dst=%llu, src=%llu, len=%lu", 92 __print_disk_name(__entry->disk), 93 blk_op_str(__entry->op), > 94 __entry->dst, __entry->src, __entry->len) 95 ); 96 #endif /* _TRACE_NULLB_H */ 97
Hi Nitesh,
kernel test robot noticed the following build warnings:
[auto build test WARNING on c50216cfa084d5eb67dc10e646a3283da1595bb6]
url: https://github.com/intel-lab-lkp/linux/commits/Nitesh-Shetty/block-Introduce-queue-limits-and-sysfs-for-copy-offload-support/20230907-015817
base: c50216cfa084d5eb67dc10e646a3283da1595bb6
patch link: https://lore.kernel.org/r/20230906163844.18754-13-nj.shetty%40samsung.com
patch subject: [PATCH v15 12/12] null_blk: add support for copy offload
config: parisc-allyesconfig (https://download.01.org/0day-ci/archive/20230907/202309070607.akFEF327-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230907/202309070607.akFEF327-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309070607.akFEF327-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from include/trace/define_trace.h:102,
from drivers/block/null_blk/trace.h:104,
from drivers/block/null_blk/main.c:15:
drivers/block/null_blk/./trace.h: In function 'trace_raw_output_nullb_copy_op':
>> drivers/block/null_blk/./trace.h:91:27: warning: format '%lu' expects argument of type 'long unsigned int', but argument 7 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
91 | TP_printk("%s req=%-15s: dst=%llu, src=%llu, len=%lu",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/trace/trace_events.h:203:34: note: in definition of macro 'DECLARE_EVENT_CLASS'
203 | trace_event_printf(iter, print); \
| ^~~~~
include/trace/trace_events.h:45:30: note: in expansion of macro 'PARAMS'
45 | PARAMS(print)); \
| ^~~~~~
drivers/block/null_blk/./trace.h:73:1: note: in expansion of macro 'TRACE_EVENT'
73 | TRACE_EVENT(nullb_copy_op,
| ^~~~~~~~~~~
drivers/block/null_blk/./trace.h:91:17: note: in expansion of macro 'TP_printk'
91 | TP_printk("%s req=%-15s: dst=%llu, src=%llu, len=%lu",
| ^~~~~~~~~
In file included from include/trace/trace_events.h:237:
drivers/block/null_blk/./trace.h:91:68: note: format string is defined here
91 | TP_printk("%s req=%-15s: dst=%llu, src=%llu, len=%lu",
| ~~^
| |
| long unsigned int
| %u
vim +91 drivers/block/null_blk/./trace.h
72
73 TRACE_EVENT(nullb_copy_op,
74 TP_PROTO(struct request *req,
75 sector_t dst, sector_t src, size_t len),
76 TP_ARGS(req, dst, src, len),
77 TP_STRUCT__entry(
78 __array(char, disk, DISK_NAME_LEN)
79 __field(enum req_op, op)
80 __field(sector_t, dst)
81 __field(sector_t, src)
82 __field(size_t, len)
83 ),
84 TP_fast_assign(
85 __entry->op = req_op(req);
86 __assign_disk_name(__entry->disk, req->q->disk);
87 __entry->dst = dst;
88 __entry->src = src;
89 __entry->len = len;
90 ),
> 91 TP_printk("%s req=%-15s: dst=%llu, src=%llu, len=%lu",
92 __print_disk_name(__entry->disk),
93 blk_op_str(__entry->op),
94 __entry->dst, __entry->src, __entry->len)
95 );
96 #endif /* _TRACE_NULLB_H */
97
On 9/6/23 18:38, Nitesh Shetty wrote: > Implementation is based on existing read and write infrastructure. > copy_max_bytes: A new configfs and module parameter is introduced, which > can be used to set hardware/driver supported maximum copy limit. > Only request based queue mode will support for copy offload. > Added tracefs support to copy IO tracing. > > Suggested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> > Signed-off-by: Anuj Gupta <anuj20.g@samsung.com> > Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com> > Signed-off-by: Vincent Fu <vincent.fu@samsung.com> > --- > Documentation/block/null_blk.rst | 5 ++ > drivers/block/null_blk/main.c | 97 ++++++++++++++++++++++++++++++- > drivers/block/null_blk/null_blk.h | 1 + > drivers/block/null_blk/trace.h | 23 ++++++++ > 4 files changed, 123 insertions(+), 3 deletions(-) > Reviewed-by: Hannes Reinecke <hare@suse.de> Cheers, Hannes
diff --git a/Documentation/block/null_blk.rst b/Documentation/block/null_blk.rst index 4dd78f24d10a..6153e02fcf13 100644 --- a/Documentation/block/null_blk.rst +++ b/Documentation/block/null_blk.rst @@ -149,3 +149,8 @@ zone_size=[MB]: Default: 256 zone_nr_conv=[nr_conv]: Default: 0 The number of conventional zones to create when block device is zoned. If zone_nr_conv >= nr_zones, it will be reduced to nr_zones - 1. + +copy_max_bytes=[size in bytes]: Default: COPY_MAX_BYTES + A module and configfs parameter which can be used to set hardware/driver + supported maximum copy offload limit. + COPY_MAX_BYTES(=128MB at present) is defined in fs.h diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index b48901b2b573..26124f2baadc 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -160,6 +160,10 @@ static int g_max_sectors; module_param_named(max_sectors, g_max_sectors, int, 0444); MODULE_PARM_DESC(max_sectors, "Maximum size of a command (in 512B sectors)"); +static unsigned long g_copy_max_bytes = BLK_COPY_MAX_BYTES; +module_param_named(copy_max_bytes, g_copy_max_bytes, ulong, 0444); +MODULE_PARM_DESC(copy_max_bytes, "Maximum size of a copy command (in bytes)"); + static unsigned int nr_devices = 1; module_param(nr_devices, uint, 0444); MODULE_PARM_DESC(nr_devices, "Number of devices to register"); @@ -412,6 +416,7 @@ NULLB_DEVICE_ATTR(home_node, uint, NULL); NULLB_DEVICE_ATTR(queue_mode, uint, NULL); NULLB_DEVICE_ATTR(blocksize, uint, NULL); NULLB_DEVICE_ATTR(max_sectors, uint, NULL); +NULLB_DEVICE_ATTR(copy_max_bytes, uint, NULL); NULLB_DEVICE_ATTR(irqmode, uint, NULL); NULLB_DEVICE_ATTR(hw_queue_depth, uint, NULL); NULLB_DEVICE_ATTR(index, uint, NULL); @@ -553,6 +558,7 @@ static struct configfs_attribute *nullb_device_attrs[] = { &nullb_device_attr_queue_mode, &nullb_device_attr_blocksize, &nullb_device_attr_max_sectors, + &nullb_device_attr_copy_max_bytes, &nullb_device_attr_irqmode, &nullb_device_attr_hw_queue_depth, &nullb_device_attr_index, @@ -659,7 +665,8 @@ static ssize_t memb_group_features_show(struct config_item *item, char *page) "poll_queues,power,queue_mode,shared_tag_bitmap,size," "submit_queues,use_per_node_hctx,virt_boundary,zoned," "zone_capacity,zone_max_active,zone_max_open," - "zone_nr_conv,zone_offline,zone_readonly,zone_size\n"); + "zone_nr_conv,zone_offline,zone_readonly,zone_size," + "copy_max_bytes\n"); } CONFIGFS_ATTR_RO(memb_group_, features); @@ -725,6 +732,7 @@ static struct nullb_device *null_alloc_dev(void) dev->queue_mode = g_queue_mode; dev->blocksize = g_bs; dev->max_sectors = g_max_sectors; + dev->copy_max_bytes = g_copy_max_bytes; dev->irqmode = g_irqmode; dev->hw_queue_depth = g_hw_queue_depth; dev->blocking = g_blocking; @@ -1274,6 +1282,81 @@ static int null_transfer(struct nullb *nullb, struct page *page, return err; } +static inline int nullb_setup_copy(struct nullb *nullb, struct request *req, + bool is_fua) +{ + sector_t sector_in = 0, sector_out = 0; + loff_t offset_in, offset_out; + void *in, *out; + ssize_t chunk, rem = 0; + struct bio *bio; + struct nullb_page *t_page_in, *t_page_out; + u16 seg = 1; + int status = -EIO; + + if (blk_rq_nr_phys_segments(req) != BLK_COPY_MAX_SEGMENTS) + return status; + + /* + * First bio contains information about source and last bio contains + * information about destination. + */ + __rq_for_each_bio(bio, req) { + if (seg == blk_rq_nr_phys_segments(req)) { + sector_out = bio->bi_iter.bi_sector; + if (rem != bio->bi_iter.bi_size) + return status; + } else { + sector_in = bio->bi_iter.bi_sector; + rem = bio->bi_iter.bi_size; + } + seg++; + } + + trace_nullb_copy_op(req, sector_out << SECTOR_SHIFT, + sector_in << SECTOR_SHIFT, rem); + + spin_lock_irq(&nullb->lock); + while (rem > 0) { + chunk = min_t(size_t, nullb->dev->blocksize, rem); + offset_in = (sector_in & SECTOR_MASK) << SECTOR_SHIFT; + offset_out = (sector_out & SECTOR_MASK) << SECTOR_SHIFT; + + if (null_cache_active(nullb) && !is_fua) + null_make_cache_space(nullb, PAGE_SIZE); + + t_page_in = null_lookup_page(nullb, sector_in, false, + !null_cache_active(nullb)); + if (!t_page_in) + goto err; + t_page_out = null_insert_page(nullb, sector_out, + !null_cache_active(nullb) || + is_fua); + if (!t_page_out) + goto err; + + in = kmap_local_page(t_page_in->page); + out = kmap_local_page(t_page_out->page); + + memcpy(out + offset_out, in + offset_in, chunk); + kunmap_local(out); + kunmap_local(in); + __set_bit(sector_out & SECTOR_MASK, t_page_out->bitmap); + + if (is_fua) + null_free_sector(nullb, sector_out, true); + + rem -= chunk; + sector_in += chunk >> SECTOR_SHIFT; + sector_out += chunk >> SECTOR_SHIFT; + } + + status = 0; +err: + spin_unlock_irq(&nullb->lock); + return status; +} + static int null_handle_rq(struct nullb_cmd *cmd) { struct request *rq = cmd->rq; @@ -1283,13 +1366,16 @@ static int null_handle_rq(struct nullb_cmd *cmd) sector_t sector = blk_rq_pos(rq); struct req_iterator iter; struct bio_vec bvec; + bool fua = rq->cmd_flags & REQ_FUA; + + if (op_is_copy(req_op(rq))) + return nullb_setup_copy(nullb, rq, fua); spin_lock_irq(&nullb->lock); rq_for_each_segment(bvec, rq, iter) { len = bvec.bv_len; err = null_transfer(nullb, bvec.bv_page, len, bvec.bv_offset, - op_is_write(req_op(rq)), sector, - rq->cmd_flags & REQ_FUA); + op_is_write(req_op(rq)), sector, fua); if (err) { spin_unlock_irq(&nullb->lock); return err; @@ -2045,6 +2131,9 @@ static int null_validate_conf(struct nullb_device *dev) return -EINVAL; } + if (dev->queue_mode == NULL_Q_BIO) + dev->copy_max_bytes = 0; + return 0; } @@ -2164,6 +2253,8 @@ static int null_add_dev(struct nullb_device *dev) dev->max_sectors = queue_max_hw_sectors(nullb->q); dev->max_sectors = min(dev->max_sectors, BLK_DEF_MAX_SECTORS); blk_queue_max_hw_sectors(nullb->q, dev->max_sectors); + blk_queue_max_copy_hw_sectors(nullb->q, + dev->copy_max_bytes >> SECTOR_SHIFT); if (dev->virt_boundary) blk_queue_virt_boundary(nullb->q, PAGE_SIZE - 1); diff --git a/drivers/block/null_blk/null_blk.h b/drivers/block/null_blk/null_blk.h index 929f659dd255..e82e53a2e2df 100644 --- a/drivers/block/null_blk/null_blk.h +++ b/drivers/block/null_blk/null_blk.h @@ -107,6 +107,7 @@ struct nullb_device { unsigned int queue_mode; /* block interface */ unsigned int blocksize; /* block size */ unsigned int max_sectors; /* Max sectors per command */ + unsigned long copy_max_bytes; /* Max copy offload length in bytes */ unsigned int irqmode; /* IRQ completion handler */ unsigned int hw_queue_depth; /* queue depth */ unsigned int index; /* index of the disk, only valid with a disk */ diff --git a/drivers/block/null_blk/trace.h b/drivers/block/null_blk/trace.h index 91446c34eac2..2f2c1d1c2b48 100644 --- a/drivers/block/null_blk/trace.h +++ b/drivers/block/null_blk/trace.h @@ -70,6 +70,29 @@ TRACE_EVENT(nullb_report_zones, ); #endif /* CONFIG_BLK_DEV_ZONED */ +TRACE_EVENT(nullb_copy_op, + TP_PROTO(struct request *req, + sector_t dst, sector_t src, size_t len), + TP_ARGS(req, dst, src, len), + TP_STRUCT__entry( + __array(char, disk, DISK_NAME_LEN) + __field(enum req_op, op) + __field(sector_t, dst) + __field(sector_t, src) + __field(size_t, len) + ), + TP_fast_assign( + __entry->op = req_op(req); + __assign_disk_name(__entry->disk, req->q->disk); + __entry->dst = dst; + __entry->src = src; + __entry->len = len; + ), + TP_printk("%s req=%-15s: dst=%llu, src=%llu, len=%lu", + __print_disk_name(__entry->disk), + blk_op_str(__entry->op), + __entry->dst, __entry->src, __entry->len) +); #endif /* _TRACE_NULLB_H */ #undef TRACE_INCLUDE_PATH