From: Richard Weinberger <richard@nod.at>
To: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Artem Bityutskiy <dedekind1@gmail.com>,
adrian.hunter@intel.com, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org,
kernel-team@lge.com
Subject: Re: [PATCH] ubifs: Add freeze support
Date: Fri, 26 May 2017 11:52:42 +0200 [thread overview]
Message-ID: <2f3210d7-b0c3-f006-754e-ec4bae26454c@nod.at> (raw)
In-Reply-To: <1495755004-17036-1-git-send-email-hyc.lee@gmail.com>
Hyunchul,
Am 26.05.2017 um 01:30 schrieb Hyunchul Lee:
> From: Hyunchul Lee <cheol.lee@lge.com>
>
> for un/freeze support, implement freeze_super and un/freeze_fs
> of super_operations.
> ubifs_freeze_super just calls freeze_super. because freeze_super always
> succeeds if file system is read-only, UBIFS errors should be checked.
> if there are errors, UBIFS is switched to read-only mode.
> ubifs_freeze_fs runs commit if TNC/LPT isn't clean. though all writes
> are blocked and sync_fs is called before, if commit alreay was started
> before writes are blocked, TNC/LPT might have dirty COW nodes.
you explain how you implement that feature, but not why.
What is the use-case?
I always thought this interface is only being used by LVM.
Thanks,
//richard
next prev parent reply other threads:[~2017-05-26 9:53 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-25 23:30 [PATCH] ubifs: Add freeze support Hyunchul Lee
2017-05-26 9:52 ` Richard Weinberger [this message]
2017-05-27 8:18 ` Christoph Hellwig
2017-05-29 1:18 ` Hyunchul Lee
2017-05-29 4:40 ` Hyunchul Lee
2017-05-29 5:40 ` Amir Goldstein
2017-05-29 9:00 ` Richard Weinberger
2017-05-29 10:04 ` Amir Goldstein
2017-05-29 10:17 ` Richard Weinberger
2017-05-29 11:44 ` Amir Goldstein
2017-05-27 8:23 ` Christoph Hellwig
2017-05-29 0:43 ` Hyunchul Lee
2017-05-29 2:24 ` Hyunchul Lee
2017-05-29 8:42 ` Richard Weinberger
2017-05-30 2:37 ` Hyunchul Lee
2017-05-30 7:51 ` Richard Weinberger
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