From: Nikolay Borisov <nborisov@suse.com>
To: Josef Bacik <josef@toxicpanda.com>,
linux-btrfs@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH 16/23] btrfs: serialize data reservations if we are flushing
Date: Mon, 3 Feb 2020 17:06:44 +0200 [thread overview]
Message-ID: <45f47313-d766-391e-5a85-7ff961236129@suse.com> (raw)
In-Reply-To: <20200131223613.490779-17-josef@toxicpanda.com>
On 1.02.20 г. 0:36 ч., Josef Bacik wrote:
> Nikolay reported a problem where generic/371 would fail sometimes with a
> slow drive. The gist of the test is that we fallocate a file in
> parallel with a pwrite of a different file. These two files combined
> are smaller than the file system, but sometimes the pwrite would ENOSPC.
>
> A fair bit of investigation uncovered the fact that the fallocate
> workload was racing in and grabbing the free space that the pwrite
> workload was trying to free up so it could make its own reservation.
> After a few loops of this eventually the pwrite workload would error out
> with an ENOSPC.
>
> We've had the same problem with metadata as well, and we serialized all
> metadata allocations to satisfy this problem. This wasn't usually a
> problem with data because data reservations are more straightforward,
> but obviously could still happen.
>
> Fix this by not allowing reservations to occur if there are any pending
> tickets waiting to be satisfied on the space info.
>
> Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
next prev parent reply other threads:[~2020-02-03 15:06 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-31 22:35 [PATCH 00/23][v2] Convert data reservations to the ticketing infrastructure Josef Bacik
2020-01-31 22:35 ` [PATCH 01/23] btrfs: change nr to u64 in btrfs_start_delalloc_roots Josef Bacik
2020-02-03 10:45 ` Johannes Thumshirn
2020-02-03 11:15 ` Nikolay Borisov
2020-01-31 22:35 ` [PATCH 02/23] btrfs: remove orig from shrink_delalloc Josef Bacik
2020-02-03 10:46 ` Johannes Thumshirn
2020-01-31 22:35 ` [PATCH 03/23] btrfs: handle U64_MAX for shrink_delalloc Josef Bacik
2020-02-03 11:01 ` Johannes Thumshirn
2020-02-03 11:05 ` Johannes Thumshirn
2020-01-31 22:35 ` [PATCH 04/23] btrfs: make shrink_delalloc take space_info as an arg Josef Bacik
2020-02-03 10:53 ` Johannes Thumshirn
2020-01-31 22:35 ` [PATCH 05/23] btrfs: make ALLOC_CHUNK use the space info flags Josef Bacik
2020-02-03 11:19 ` Johannes Thumshirn
2020-01-31 22:35 ` [PATCH 06/23] btrfs: call btrfs_try_granting_tickets when freeing reserved bytes Josef Bacik
2020-01-31 22:35 ` [PATCH 07/23] btrfs: call btrfs_try_granting_tickets when unpinning anything Josef Bacik
2020-02-03 11:24 ` Johannes Thumshirn
2020-01-31 22:35 ` [PATCH 08/23] btrfs: call btrfs_try_granting_tickets when reserving space Josef Bacik
2020-01-31 22:35 ` [PATCH 09/23] btrfs: use the btrfs_space_info_free_bytes_may_use helper for delalloc Josef Bacik
2020-02-03 14:46 ` Johannes Thumshirn
2020-01-31 22:36 ` [PATCH 10/23] btrfs: use btrfs_start_delalloc_roots in shrink_delalloc Josef Bacik
2020-02-03 12:03 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 11/23] btrfs: check tickets after waiting on ordered extents Josef Bacik
2020-02-03 13:10 ` Nikolay Borisov
2020-02-03 15:57 ` Josef Bacik
2020-01-31 22:36 ` [PATCH 12/23] btrfs: add the data transaction commit logic into may_commit_transaction Josef Bacik
2020-02-03 14:00 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 13/23] btrfs: add flushing states for handling data reservations Josef Bacik
2020-02-03 14:00 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 14/23] btrfs: add btrfs_reserve_data_bytes and use it Josef Bacik
2020-02-03 14:20 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 15/23] btrfs: use ticketing for data space reservations Josef Bacik
2020-02-03 14:29 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 16/23] btrfs: serialize data reservations if we are flushing Josef Bacik
2020-02-03 15:06 ` Nikolay Borisov [this message]
2020-01-31 22:36 ` [PATCH 17/23] btrfs: use the same helper for data and metadata reservations Josef Bacik
2020-02-03 15:47 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 18/23] btrfs: drop the commit_cycles stuff for data reservations Josef Bacik
2020-02-03 16:02 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 19/23] btrfs: don't pass bytes_needed to may_commit_transaction Josef Bacik
2020-02-03 16:10 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 20/23] btrfs: don't force commit if we are data Josef Bacik
2020-02-03 16:12 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 21/23] btrfs: run delayed iputs before committing the transaction for data Josef Bacik
2020-02-03 16:13 ` Nikolay Borisov
2020-01-31 22:36 ` [PATCH 22/23] btrfs: flush delayed refs when trying to reserve data space Josef Bacik
2020-02-03 16:16 ` Nikolay Borisov
2020-02-03 16:24 ` Josef Bacik
2020-01-31 22:36 ` [PATCH 23/23] btrfs: do async reclaim for data reservations Josef Bacik
2020-02-03 17:19 ` Nikolay Borisov
2020-02-03 18:51 ` Josef Bacik
-- strict thread matches above, loose matches on Subject: below --
2020-02-04 16:19 [PATCH 0/23][v4] Convert data reservations to the ticketing infrastructure Josef Bacik
2020-02-04 16:19 ` [PATCH 16/23] btrfs: serialize data reservations if we are flushing Josef Bacik
2020-02-04 17:05 ` Johannes Thumshirn
2020-06-30 13:58 [PATCH 00/23] Change data reservations to use the ticketing infra Josef Bacik
2020-06-30 13:59 ` [PATCH 16/23] btrfs: serialize data reservations if we are flushing Josef Bacik
2020-07-07 15:42 [PATCH 00/23][v2] Change data reservations to use the ticketing infra Josef Bacik
2020-07-07 15:42 ` [PATCH 16/23] btrfs: serialize data reservations if we are flushing Josef Bacik
2020-07-08 13:59 [PATCH 00/23][v3] Change data reservations to use the ticketing infra Josef Bacik
2020-07-08 14:00 ` [PATCH 16/23] btrfs: serialize data reservations if we are flushing Josef Bacik
2020-07-21 14:22 [PATCH 00/23][v4] Change data reservations to use the ticketing infra Josef Bacik
2020-07-21 14:22 ` [PATCH 16/23] btrfs: serialize data reservations if we are flushing Josef Bacik
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