From: louis@waffle.tech
To: "Nikolay Borisov" <nborisov@suse.com>,
"Wang Yugui" <wangyugui@e16-tech.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: [PATCH] btrfs: balance RAID1/RAID10 mirror selection
Date: Mon, 02 Nov 2020 19:29:04 +0000 [thread overview]
Message-ID: <041d24ef26dc5c763c5af6d6de7434ef@waffle.tech> (raw)
In-Reply-To: <d4d600aa-a56b-2458-f504-afbb584f888b@suse.com>
Good points. I'll move it into 'struct btrfs_fs_info', look at making it a per-cpu variable, and do some testing with perf (later this week hopefully).
Louis
October 23, 2020 1:42 AM, "Nikolay Borisov" <nborisov@suse.com> wrote:
> On 23.10.20 г. 10:38 ч., Wang Yugui wrote:
>
>> Hi, Louis Jencka
>>
>> Can we move 'atomic_t rr_counter' into 'struct btrfs_fs_info' to
>> support multiple mounted btrfs filesystem?
>
> And introduce constant cache line pings for every read. This thing needs
> to be tested under load with perf to see what kind of overhead the
> shared atomic_t counter adds. My hunch is this should really be a
> per-cpu variable.
>
> <snip>
next prev parent reply other threads:[~2020-11-02 19:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-16 5:59 [PATCH] btrfs: balance RAID1/RAID10 mirror selection louis
2020-10-16 7:15 ` Nikolay Borisov
2020-10-16 7:29 ` Qu Wenruo
2020-10-16 17:28 ` louis
2020-10-18 8:16 ` Anand Jain
2020-10-16 16:18 ` louis
2020-10-16 17:21 ` waxhead
2020-10-23 7:38 ` Wang Yugui
2020-10-23 7:42 ` Nikolay Borisov
2020-11-02 19:29 ` louis [this message]
2020-11-02 19:36 ` louis
2020-10-27 14:26 ` Wang Yugui
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