From: Dennis Zhou <dennis@kernel.org>
To: dsterba@suse.cz, David Sterba <dsterba@suse.com>,
Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
Omar Sandoval <osandov@osandov.com>,
kernel-team@fb.com, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 16/22] btrfs: make max async discard size tunable
Date: Thu, 2 Jan 2020 11:50:04 -0500
Message-ID: <20200102165004.GD86832@dennisz-mbp.dhcp.thefacebook.com> (raw)
In-Reply-To: <20191230180503.GA3929@twin.jikos.cz>
On Mon, Dec 30, 2019 at 07:05:03PM +0100, David Sterba wrote:
> On Fri, Dec 13, 2019 at 04:22:25PM -0800, Dennis Zhou wrote:
> > Expose max_discard_size as a tunable via sysfs.
> >
> > Signed-off-by: Dennis Zhou <dennis@kernel.org>
> > ---
> > fs/btrfs/ctree.h | 1 +
> > fs/btrfs/discard.c | 1 +
> > fs/btrfs/free-space-cache.c | 19 ++++++++++++-------
> > fs/btrfs/sysfs.c | 31 +++++++++++++++++++++++++++++++
> > 4 files changed, 45 insertions(+), 7 deletions(-)
> >
> > diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
> > index 1b2dae5962de..bf93ddbc773f 100644
> > --- a/fs/btrfs/ctree.h
> > +++ b/fs/btrfs/ctree.h
> > @@ -470,6 +470,7 @@ struct btrfs_discard_ctl {
> > u64 prev_discard;
> > atomic_t discardable_extents;
> > atomic64_t discardable_bytes;
> > + u64 max_discard_size;
> > u32 delay;
> > u32 iops_limit;
> > u64 bps_limit;
> > diff --git a/fs/btrfs/discard.c b/fs/btrfs/discard.c
> > index 085f36808e7f..dd5143f0283f 100644
> > --- a/fs/btrfs/discard.c
> > +++ b/fs/btrfs/discard.c
> > @@ -536,6 +536,7 @@ void btrfs_discard_init(struct btrfs_fs_info *fs_info)
> > discard_ctl->prev_discard = 0;
> > atomic_set(&discard_ctl->discardable_extents, 0);
> > atomic64_set(&discard_ctl->discardable_bytes, 0);
> > + discard_ctl->max_discard_size = BTRFS_ASYNC_DISCARD_MAX_SIZE;
>
> BTRFS_ASYNC_DISCARD_MAX_SIZE won't be the upper limit anymore but a
> default so it should be named as such.
Renamed to BTRFS_ASYNC_DISCARD_MAX_SIZE_DFL.
next prev parent reply index
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-14 0:22 [PATCH v6 00/22] btrfs: async discard support Dennis Zhou
2019-12-14 0:22 ` [PATCH 01/22] bitmap: genericize percpu bitmap region iterators Dennis Zhou
2019-12-14 0:22 ` [PATCH 02/22] btrfs: rename DISCARD opt to DISCARD_SYNC Dennis Zhou
2019-12-14 0:22 ` [PATCH 03/22] btrfs: keep track of which extents have been discarded Dennis Zhou
2019-12-14 0:22 ` [PATCH 04/22] btrfs: keep track of cleanliness of the bitmap Dennis Zhou
2019-12-14 0:22 ` [PATCH 05/22] btrfs: add the beginning of async discard, discard workqueue Dennis Zhou
2019-12-14 0:22 ` [PATCH 06/22] btrfs: handle empty block_group removal Dennis Zhou
2019-12-14 0:22 ` [PATCH 07/22] btrfs: discard one region at a time in async discard Dennis Zhou
2019-12-14 0:22 ` [PATCH 08/22] btrfs: add removal calls for sysfs debug/ Dennis Zhou
2019-12-18 11:45 ` Anand Jain
2019-12-14 0:22 ` [PATCH 09/22] btrfs: make UUID/debug have its own kobject Dennis Zhou
2019-12-18 11:45 ` Anand Jain
2019-12-14 0:22 ` [PATCH 10/22] btrfs: add discard sysfs directory Dennis Zhou
2019-12-18 11:45 ` Anand Jain
2019-12-14 0:22 ` [PATCH 11/22] btrfs: track discardable extents for async discard Dennis Zhou
2019-12-14 0:22 ` [PATCH 12/22] btrfs: keep track of discardable_bytes Dennis Zhou
2019-12-14 0:22 ` [PATCH 13/22] btrfs: calculate discard delay based on number of extents Dennis Zhou
2019-12-30 16:50 ` David Sterba
2020-01-02 16:45 ` Dennis Zhou
2019-12-14 0:22 ` [PATCH 14/22] btrfs: add bps discard rate limit Dennis Zhou
2019-12-30 17:58 ` David Sterba
2020-01-02 16:46 ` Dennis Zhou
2019-12-14 0:22 ` [PATCH 15/22] btrfs: limit max discard size for async discard Dennis Zhou
2019-12-30 18:00 ` David Sterba
2019-12-30 18:08 ` David Sterba
2020-01-02 16:48 ` Dennis Zhou
2019-12-14 0:22 ` [PATCH 16/22] btrfs: make max async discard size tunable Dennis Zhou
2019-12-30 18:05 ` David Sterba
2020-01-02 16:50 ` Dennis Zhou [this message]
2019-12-14 0:22 ` [PATCH 17/22] btrfs: have multiple discard lists Dennis Zhou
2019-12-14 0:22 ` [PATCH 18/22] btrfs: only keep track of data extents for async discard Dennis Zhou
2019-12-30 17:39 ` David Sterba
2020-01-02 16:55 ` Dennis Zhou
2019-12-14 0:22 ` [PATCH 19/22] btrfs: keep track of discard reuse stats Dennis Zhou
2019-12-30 17:33 ` David Sterba
2020-01-02 16:57 ` Dennis Zhou
2019-12-14 0:22 ` [PATCH 20/22] btrfs: add async discard header Dennis Zhou
2019-12-14 0:22 ` [PATCH 21/22] btrfs: increase the metadata allowance for the free_space_cache Dennis Zhou
2019-12-14 0:22 ` [PATCH 22/22] btrfs: make smaller extents more likely to go into bitmaps Dennis Zhou
2019-12-17 14:55 ` [PATCH v6 00/22] btrfs: async discard support David Sterba
2019-12-18 0:06 ` Dennis Zhou
2019-12-19 2:03 ` Dennis Zhou
2019-12-19 20:06 ` David Sterba
2019-12-19 21:22 ` Dennis Zhou
2019-12-19 20:34 ` David Sterba
2019-12-19 21:17 ` Dennis Zhou
2019-12-30 18:13 ` David Sterba
2019-12-30 18:49 ` Dennis Zhou
2020-01-02 13:22 ` David Sterba
-- strict thread matches above, loose matches on Subject: below --
2019-12-09 19:45 [PATCH v5 " Dennis Zhou
2019-12-09 19:46 ` [PATCH 16/22] btrfs: make max async discard size tunable Dennis Zhou
2019-11-25 19:46 [PATCH v4 00/22] btrfs: async discard support Dennis Zhou
2019-11-25 19:46 ` [PATCH 16/22] btrfs: make max async discard size tunable Dennis Zhou
2019-11-20 21:50 [PATCH v3 00/22] btrfs: async discard support Dennis Zhou
2019-11-20 21:51 ` [PATCH 16/22] btrfs: make max async discard size tunable Dennis Zhou
2019-10-23 22:52 [PATCH v2 00/22] btrfs: async discard support Dennis Zhou
2019-10-23 22:53 ` [PATCH 16/22] btrfs: make max async discard size tunable Dennis Zhou
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