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authorMing Lei <ming.lei@redhat.com>2018-12-17 18:42:48 +0800
committerJens Axboe <axboe@kernel.dk>2018-12-17 05:44:45 -0700
commit346fc1089e5d4734990b4b6c3cd0cdeae9ae482d (patch)
treeeca212d47c41b63d2b7b8bc74475442181843141 /block
parent07b35eb5a364fa59f88f65e6c786192f2c9163be (diff)
downloadlinux-stericsson-346fc1089e5d4734990b4b6c3cd0cdeae9ae482d.tar.gz
blk-mq: export hctx->type in debugfs instead of sysfs
Now we only export hctx->type via sysfs, and there isn't such info in hctx entry under debugfs. We often use debugfs only to diagnose queue mapping issue, so add the support in debugfs. Queue mapping becomes a bit more complicated after multiple queue mapping is supported, we may write blktest to verify if queue mapping is valid based on blk-mq-debugfs. Given not necessary to export hctx->type twice, so remove the export from sysfs. Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq-debugfs.c16
-rw-r--r--block/blk-mq-sysfs.c17
2 files changed, 16 insertions, 17 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 2793e91bc7a4..1e12033be9ea 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -447,6 +447,21 @@ static int hctx_busy_show(void *data, struct seq_file *m)
return 0;
}
+static const char *const hctx_types[] = {
+ [HCTX_TYPE_DEFAULT] = "default",
+ [HCTX_TYPE_READ] = "read",
+ [HCTX_TYPE_POLL] = "poll",
+};
+
+static int hctx_type_show(void *data, struct seq_file *m)
+{
+ struct blk_mq_hw_ctx *hctx = data;
+
+ BUILD_BUG_ON(ARRAY_SIZE(hctx_types) != HCTX_MAX_TYPES);
+ seq_printf(m, "%s\n", hctx_types[hctx->type]);
+ return 0;
+}
+
static int hctx_ctx_map_show(void *data, struct seq_file *m)
{
struct blk_mq_hw_ctx *hctx = data;
@@ -799,6 +814,7 @@ static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = {
{"run", 0600, hctx_run_show, hctx_run_write},
{"active", 0400, hctx_active_show},
{"dispatch_busy", 0400, hctx_dispatch_busy_show},
+ {"type", 0400, hctx_type_show},
{},
};
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index 9c2df137256a..3f9c3f4ac44c 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -173,18 +173,6 @@ static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page)
return ret;
}
-static const char *const hctx_types[] = {
- [HCTX_TYPE_DEFAULT] = "default",
- [HCTX_TYPE_READ] = "read",
- [HCTX_TYPE_POLL] = "poll",
-};
-
-static ssize_t blk_mq_hw_sysfs_type_show(struct blk_mq_hw_ctx *hctx, char *page)
-{
- BUILD_BUG_ON(ARRAY_SIZE(hctx_types) != HCTX_MAX_TYPES);
- return sprintf(page, "%s\n", hctx_types[hctx->type]);
-}
-
static struct attribute *default_ctx_attrs[] = {
NULL,
};
@@ -201,16 +189,11 @@ static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = {
.attr = {.name = "cpu_list", .mode = 0444 },
.show = blk_mq_hw_sysfs_cpus_show,
};
-static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_type = {
- .attr = {.name = "type", .mode = 0444 },
- .show = blk_mq_hw_sysfs_type_show,
-};
static struct attribute *default_hw_ctx_attrs[] = {
&blk_mq_hw_sysfs_nr_tags.attr,
&blk_mq_hw_sysfs_nr_reserved_tags.attr,
&blk_mq_hw_sysfs_cpus.attr,
- &blk_mq_hw_sysfs_type.attr,
NULL,
};