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bcachefs: Add max nr of IOs in flight to the move path

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-01-09 01:45:18 -05:00
parent 01efebd8f1
commit c782c5832e
3 changed files with 24 additions and 7 deletions
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22
fs/bcachefs/move.c
View File

@ -74,6 +74,7 @@ static void move_write_done(struct bch_write_op *op)
ctxt->write_error = true;
atomic_sub(io->write_sectors, &io->write.ctxt->write_sectors);
atomic_dec(&io->write.ctxt->write_ios);
move_free(io);
closure_put(&ctxt->cl);
}
@ -87,6 +88,7 @@ static void move_write(struct moving_io *io)
closure_get(&io->write.ctxt->cl);
atomic_add(io->write_sectors, &io->write.ctxt->write_sectors);
atomic_inc(&io->write.ctxt->write_ios);
bch2_data_update_read_done(&io->write, io->rbio.pick.crc);
}
@ -105,6 +107,7 @@ static void move_read_endio(struct bio *bio)
struct moving_context *ctxt = io->write.ctxt;
atomic_sub(io->read_sectors, &ctxt->read_sectors);
atomic_dec(&ctxt->read_ios);
io->read_completed = true;
wake_up(&ctxt->wait);
@ -139,7 +142,11 @@ void bch2_moving_ctxt_exit(struct moving_context *ctxt)
{
move_ctxt_wait_event(ctxt, NULL, list_empty(&ctxt->reads));
closure_sync(&ctxt->cl);
EBUG_ON(atomic_read(&ctxt->write_sectors));
EBUG_ON(atomic_read(&ctxt->write_ios));
EBUG_ON(atomic_read(&ctxt->read_sectors));
EBUG_ON(atomic_read(&ctxt->read_ios));
if (ctxt->stats) {
progress_list_del(ctxt->c, ctxt->stats);
@ -314,6 +321,7 @@ static int bch2_move_extent(struct btree_trans *trans,
trace_move_extent_read(k.k);
atomic_add(io->read_sectors, &ctxt->read_sectors);
atomic_inc(&ctxt->read_ios);
list_add_tail(&io->list, &ctxt->reads);
/*
@ -403,13 +411,15 @@ static int move_ratelimit(struct btree_trans *trans,
}
} while (delay);
/*
* XXX: these limits really ought to be per device, SSDs and hard drives
* will want different limits
*/
move_ctxt_wait_event(ctxt, trans,
atomic_read(&ctxt->write_sectors) <
c->opts.move_bytes_in_flight >> 9);
move_ctxt_wait_event(ctxt, trans,
atomic_read(&ctxt->read_sectors) <
c->opts.move_bytes_in_flight >> 9);
atomic_read(&ctxt->write_sectors) < c->opts.move_bytes_in_flight >> 9 &&
atomic_read(&ctxt->read_sectors) < c->opts.move_bytes_in_flight >> 9 &&
atomic_read(&ctxt->write_ios) < c->opts.move_ios_in_flight &&
atomic_read(&ctxt->read_ios) < c->opts.move_ios_in_flight);
return 0;
}

2
fs/bcachefs/move.h
View File

@ -24,6 +24,8 @@ struct moving_context {
/* in flight sectors: */
atomic_t read_sectors;
atomic_t write_sectors;
atomic_t read_ios;
atomic_t write_ios;
wait_queue_head_t wait;
};

7
fs/bcachefs/opts.h
View File

@ -299,7 +299,12 @@ enum opt_type {
OPT_HUMAN_READABLE|OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(1024, U32_MAX), \
BCH2_NO_SB_OPT, 1U << 20, \
NULL, "Amount of IO in flight to keep in flight by the move path")\
NULL, "Maximum Amount of IO to keep in flight by the move path")\
x(move_ios_in_flight, u32, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(1, 1024), \
BCH2_NO_SB_OPT, 32, \
NULL, "Maximum number of IOs to keep in flight by the move path")\
x(fsck, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \