From: Marc MERLIN <marc@merlins.org>
To: Su Yue <suy.fnst@cn.fujitsu.com>
Cc: Qu Wenruo <quwenruo.btrfs@gmx.com>,
linux-btrfs@vger.kernel.org, Su Yue <Damenly_Su@gmx.com>
Subject: Re: btrfs check lowmem, take 2
Date: Tue, 10 Jul 2018 18:44:01 -0700 [thread overview]
Message-ID: <20180711014401.hic5vcp5h2tzgyxh@merlins.org> (raw)
In-Reply-To: <9b612c36-f59c-b4c7-bb84-4a30c4a7d453@cn.fujitsu.com>
On Wed, Jul 11, 2018 at 09:08:40AM +0800, Su Yue wrote:
>
>
> On 07/11/2018 08:58 AM, Marc MERLIN wrote:
> > On Wed, Jul 11, 2018 at 08:53:58AM +0800, Su Yue wrote:
> > > > Problems
> > > > 1) btrfs check --repair _still_ takes all 32GB of RAM and crashes the
> > > > server, despite my deleting lots of snapshots.
> > > > Is it because I have too many files then?
> > > >
> > > Yes. Original check first gather all infomation about extent tree and
> > > your files in RAM, then process one by one.
> > > But deleting still counts, it does speed lowmem check up.
> >
> > Understood.
> >
> > > > 2) I tried Su's master git branch for btrfs-progs to try and see how
> > > Oh..No... My master branch is still 4.14. The true mater branch is
> > > David's here:
> > > https://github.com/kdave/btrfs-progs
> > > But the master branch has a known bug which I fixed yesterday, please see
> > > the mail.
> >
> > So, if I git sync it now, it should have your fix, and I can run it,
> > correct?
> >
> Yes, please.
Ok, I am now running
gargamel:~# time btrfs check --mode=lowmem --repair /dev/mapper/dshelf2
using git master from https://github.com/kdave/btrfs-progs
I will report back how long it takes with extent tree check and whether
it returns clean, or not.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/ | PGP 7F55D5F27AAF9D08
next prev parent reply other threads:[~2018-07-11 1:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-10 18:09 btrfs check lowmem, take 2 Marc MERLIN
2018-07-11 0:53 ` Su Yue
2018-07-11 0:58 ` Marc MERLIN
2018-07-11 1:08 ` Su Yue
2018-07-11 1:44 ` Marc MERLIN [this message]
2018-07-11 1:58 ` Su Yue
2018-07-11 3:36 ` Marc MERLIN
2018-07-11 4:07 ` Su Yue
2018-07-11 4:39 ` Marc MERLIN
2018-07-11 17:09 ` Chris Murphy
2018-07-11 17:14 ` btrfs check mode normal still hard crash-hanging systems Marc MERLIN
2018-07-12 5:26 ` Why original mode doesn't use swap? (Original: Re: btrfs check lowmem, take 2) Qu Wenruo
2018-07-12 23:14 ` Marc MERLIN
2018-07-13 0:22 ` Qu Wenruo
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