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| author | Lars Ellenberg <lars@linbit.com> | 2016-06-14 01:26:31 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-06-14 06:43:07 +0300 |
| commit | 9104d31a759fbade8505f38f92f4dde719957826 (patch) | |
| tree | ad71e3ed1cbb0a096fae43d8a48db469b8ff4761 /drivers/block/drbd/drbd_debugfs.c | |
| parent | 60bac040129720837770d0d852cf71dccbc69f61 (diff) | |
| download | linux-9104d31a759fbade8505f38f92f4dde719957826.tar.xz | |
drbd: introduce WRITE_SAME support
We will support WRITE_SAME, if
* all peers support WRITE_SAME (both in kernel and DRBD version),
* all peer devices support WRITE_SAME
* logical_block_size is identical on all peers.
We may at some point introduce a fallback on the receiving side
for devices/kernels that do not support WRITE_SAME,
by open-coding a submit loop. But not yet.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/drbd/drbd_debugfs.c')
| -rw-r--r-- | drivers/block/drbd/drbd_debugfs.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/block/drbd/drbd_debugfs.c b/drivers/block/drbd/drbd_debugfs.c index 4de95bbff486..8a9081236f92 100644 --- a/drivers/block/drbd/drbd_debugfs.c +++ b/drivers/block/drbd/drbd_debugfs.c @@ -237,14 +237,9 @@ static void seq_print_peer_request_flags(struct seq_file *m, struct drbd_peer_re seq_print_rq_state_bit(m, f & EE_SEND_WRITE_ACK, &sep, "C"); seq_print_rq_state_bit(m, f & EE_MAY_SET_IN_SYNC, &sep, "set-in-sync"); - if (f & EE_IS_TRIM) { - seq_putc(m, sep); - sep = '|'; - if (f & EE_IS_TRIM_USE_ZEROOUT) - seq_puts(m, "zero-out"); - else - seq_puts(m, "trim"); - } + if (f & EE_IS_TRIM) + __seq_print_rq_state_bit(m, f & EE_IS_TRIM_USE_ZEROOUT, &sep, "zero-out", "trim"); + seq_print_rq_state_bit(m, f & EE_WRITE_SAME, &sep, "write-same"); seq_putc(m, '\n'); } |