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Date: Tue, 31 Jan 2023 09:55:15 +0800
From: Chao Yu <chao@...nel.org>
To: Yangtao Li <frank.li@...o.com>, jaegeuk@...nel.org
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>,
Dan Carpenter <error27@...il.com>
Subject: Re: [PATCH v3 2/2] f2fs: use iostat_lat_type directly as a parameter
in the iostat_update_and_unbind_ctx()
On 2023/1/21 0:16, Yangtao Li wrote:
> Convert to use iostat_lat_type as parameter instead of raw number.
> BTW, move NUM_PREALLOC_IOSTAT_CTXS to the header file, and rename
> iotype to page_type to match the definition.
>
> Reported-by: kernel test robot <lkp@...el.com>
> Reported-by: Dan Carpenter <error27@...il.com>
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
> v3:
> -convert to f2fs_warn()
> fs/f2fs/data.c | 4 ++--
> fs/f2fs/iostat.c | 39 ++++++++++++++++-----------------------
> fs/f2fs/iostat.h | 19 ++++++++++---------
> 3 files changed, 28 insertions(+), 34 deletions(-)
>
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 1645b8a1b904..710d4acde187 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -292,7 +292,7 @@ static void f2fs_read_end_io(struct bio *bio)
> struct bio_post_read_ctx *ctx;
> bool intask = in_task();
>
> - iostat_update_and_unbind_ctx(bio, 0);
> + iostat_update_and_unbind_ctx(bio, READ_IO);
> ctx = bio->bi_private;
>
> if (time_to_inject(sbi, FAULT_READ_IO))
> @@ -330,7 +330,7 @@ static void f2fs_write_end_io(struct bio *bio)
> struct bio_vec *bvec;
> struct bvec_iter_all iter_all;
>
> - iostat_update_and_unbind_ctx(bio, 1);
> + iostat_update_and_unbind_ctx(bio, bio->bi_opf & REQ_SYNC ? WRITE_SYNC_IO : WRITE_ASYNC_IO);
> sbi = bio->bi_private;
>
> if (time_to_inject(sbi, FAULT_WRITE_IO))
> diff --git a/fs/f2fs/iostat.c b/fs/f2fs/iostat.c
> index 96637756eae8..c767a2e7d5a9 100644
> --- a/fs/f2fs/iostat.c
> +++ b/fs/f2fs/iostat.c
> @@ -14,7 +14,6 @@
> #include "iostat.h"
> #include <trace/events/f2fs.h>
>
> -#define NUM_PREALLOC_IOSTAT_CTXS 128
> static struct kmem_cache *bio_iostat_ctx_cache;
> static mempool_t *bio_iostat_ctx_pool;
>
> @@ -210,53 +209,47 @@ void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,
> }
>
> static inline void __update_iostat_latency(struct bio_iostat_ctx *iostat_ctx,
> - int rw, bool is_sync)
> + enum iostat_lat_type lat_type)
> {
> unsigned long ts_diff;
> - unsigned int iotype = iostat_ctx->type;
> + unsigned int page_type = iostat_ctx->type;
> struct f2fs_sb_info *sbi = iostat_ctx->sbi;
> struct iostat_lat_info *io_lat = sbi->iostat_io_lat;
> - int idx;
> unsigned long flags;
>
> if (!sbi->iostat_enable)
> return;
>
> ts_diff = jiffies - iostat_ctx->submit_ts;
> - if (iotype == META_FLUSH) {
> - iotype = META;
> - } else if (iotype >= NR_PAGE_TYPE) {
> - f2fs_warn(sbi, "%s: %d over NR_PAGE_TYPE", __func__, iotype);
> + if (page_type == META_FLUSH) {
> + page_type = META;
> + } else if (page_type >= NR_PAGE_TYPE) {
> + f2fs_warn(sbi, "%s: %d over NR_PAGE_TYPE", __func__, page_type);
> return;
> }
>
> - if (rw == 0) {
> - idx = READ_IO;
> - } else {
> - if (is_sync)
> - idx = WRITE_SYNC_IO;
> - else
> - idx = WRITE_ASYNC_IO;
> + if (lat_type >= MAX_IO_TYPE) {
> + f2fs_warn(sbi, "%s: %d over MAX_IO_TYPE", __func__, lat_type);
> + return;
> }
>
> spin_lock_irqsave(&sbi->iostat_lat_lock, flags);
> - io_lat->sum_lat[idx][iotype] += ts_diff;
> - io_lat->bio_cnt[idx][iotype]++;
> - if (ts_diff > io_lat->peak_lat[idx][iotype])
> - io_lat->peak_lat[idx][iotype] = ts_diff;
> + io_lat->sum_lat[lat_type][page_type] += ts_diff;
> + io_lat->bio_cnt[lat_type][page_type]++;
> + if (ts_diff > io_lat->peak_lat[lat_type][page_type])
> + io_lat->peak_lat[lat_type][page_type] = ts_diff;
> spin_unlock_irqrestore(&sbi->iostat_lat_lock, flags);
> }
>
> -void iostat_update_and_unbind_ctx(struct bio *bio, int rw)
> +void iostat_update_and_unbind_ctx(struct bio *bio, enum iostat_lat_type lat_type)
> {
> struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
> - bool is_sync = bio->bi_opf & REQ_SYNC;
>
> - if (rw == 0)
> + if (lat_type == READ_IO)
> bio->bi_private = iostat_ctx->post_read_ctx;
> else
> bio->bi_private = iostat_ctx->sbi;
> - __update_iostat_latency(iostat_ctx, rw, is_sync);
> + __update_iostat_latency(iostat_ctx, lat_type);
> mempool_free(iostat_ctx, bio_iostat_ctx_pool);
> }
>
> diff --git a/fs/f2fs/iostat.h b/fs/f2fs/iostat.h
> index 2c048307b6e0..1f827a2fe6b2 100644
> --- a/fs/f2fs/iostat.h
> +++ b/fs/f2fs/iostat.h
> @@ -8,20 +8,21 @@
>
> struct bio_post_read_ctx;
>
> +enum iostat_lat_type {
> + READ_IO = 0,
> + WRITE_SYNC_IO,
> + WRITE_ASYNC_IO,
> + MAX_IO_TYPE,
> +};
How about adjusting iostat_lat[{0,1,2}] to iostat_lat[{READ_IO,WRITE_SYNC_IO,WRITE_ASYNC_IO}]
in tracepoint function.
TP_fast_assign(
__entry->dev = sbi->sb->s_dev;
__entry->d_rd_peak = iostat_lat[0][DATA].peak_lat;
__entry->d_rd_avg = iostat_lat[0][DATA].avg_lat;
__entry->d_rd_cnt = iostat_lat[0][DATA].cnt;
__entry->n_rd_peak = iostat_lat[0][NODE].peak_lat;
__entry->n_rd_avg = iostat_lat[0][NODE].avg_lat;
__entry->n_rd_cnt = iostat_lat[0][NODE].cnt;
__entry->m_rd_peak = iostat_lat[0][META].peak_lat;
__entry->m_rd_avg = iostat_lat[0][META].avg_lat;
__entry->m_rd_cnt = iostat_lat[0][META].cnt;
__entry->d_wr_s_peak = iostat_lat[1][DATA].peak_lat;
__entry->d_wr_s_avg = iostat_lat[1][DATA].avg_lat;
__entry->d_wr_s_cnt = iostat_lat[1][DATA].cnt;
__entry->n_wr_s_peak = iostat_lat[1][NODE].peak_lat;
__entry->n_wr_s_avg = iostat_lat[1][NODE].avg_lat;
__entry->n_wr_s_cnt = iostat_lat[1][NODE].cnt;
__entry->m_wr_s_peak = iostat_lat[1][META].peak_lat;
__entry->m_wr_s_avg = iostat_lat[1][META].avg_lat;
__entry->m_wr_s_cnt = iostat_lat[1][META].cnt;
__entry->d_wr_as_peak = iostat_lat[2][DATA].peak_lat;
__entry->d_wr_as_avg = iostat_lat[2][DATA].avg_lat;
__entry->d_wr_as_cnt = iostat_lat[2][DATA].cnt;
__entry->n_wr_as_peak = iostat_lat[2][NODE].peak_lat;
__entry->n_wr_as_avg = iostat_lat[2][NODE].avg_lat;
__entry->n_wr_as_cnt = iostat_lat[2][NODE].cnt;
__entry->m_wr_as_peak = iostat_lat[2][META].peak_lat;
__entry->m_wr_as_avg = iostat_lat[2][META].avg_lat;
__entry->m_wr_as_cnt = iostat_lat[2][META].cnt;
),
Thanks,
> +
> #ifdef CONFIG_F2FS_IOSTAT
>
> +#define NUM_PREALLOC_IOSTAT_CTXS 128
> #define DEFAULT_IOSTAT_PERIOD_MS 3000
> #define MIN_IOSTAT_PERIOD_MS 100
> /* maximum period of iostat tracing is 1 day */
> #define MAX_IOSTAT_PERIOD_MS 8640000
>
> -enum {
> - READ_IO,
> - WRITE_SYNC_IO,
> - WRITE_ASYNC_IO,
> - MAX_IO_TYPE,
> -};
> -
> struct iostat_lat_info {
> unsigned long sum_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* sum of io latencies */
> unsigned long peak_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* peak io latency */
> @@ -57,7 +58,7 @@ static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
> return iostat_ctx->post_read_ctx;
> }
>
> -extern void iostat_update_and_unbind_ctx(struct bio *bio, int rw);
> +extern void iostat_update_and_unbind_ctx(struct bio *bio, enum iostat_lat_type type);
> extern void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
> struct bio *bio, struct bio_post_read_ctx *ctx);
> extern int f2fs_init_iostat_processing(void);
> @@ -67,7 +68,7 @@ extern void f2fs_destroy_iostat(struct f2fs_sb_info *sbi);
> #else
> static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,
> enum iostat_type type, unsigned long long io_bytes) {}
> -static inline void iostat_update_and_unbind_ctx(struct bio *bio, int rw) {}
> +static inline void iostat_update_and_unbind_ctx(struct bio *bio, enum iostat_lat_type type) {}
> static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
> struct bio *bio, struct bio_post_read_ctx *ctx) {}
> static inline void iostat_update_submit_ctx(struct bio *bio,
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