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From: Dennis Zhou <dennis@kernel.org>
To: David Sterba <dsterba@suse.cz>
Cc: kbuild test robot <lkp@intel.com>,
	kbuild-all@lists.01.org, 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 04/22] btrfs: keep track of cleanliness of the bitmap
Date: Mon, 25 Nov 2019 14:37:46 -0500
Message-ID: <20191125193746.GB30548@dennisz-mbp.dhcp.thefacebook.com> (raw)
In-Reply-To: <20191125135910.GD2734@twin.jikos.cz>

On Mon, Nov 25, 2019 at 02:59:10PM +0100, David Sterba wrote:
> On Sat, Nov 23, 2019 at 08:17:13AM +0800, kbuild test robot wrote:
> > Hi Dennis,
> > 
> > I love your patch! Yet something to improve:
> > 
> > [auto build test ERROR on kdave/for-next]
> > [cannot apply to v5.4-rc8 next-20191122]
> > [if your patch is applied to the wrong git tree, please drop us a note to help
> > improve the system. BTW, we also suggest to use '--base' option to specify the
> > base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
> > 
> > url:    https://github.com/0day-ci/linux/commits/Dennis-Zhou/btrfs-async-discard-support/20191121-230429
> > base:   https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-next
> > config: arm-allmodconfig (attached as .config)
> > compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0
> > reproduce:
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # save the attached .config to linux build tree
> >         GCC_VERSION=7.4.0 make.cross ARCH=arm 
> > 
> > If you fix the issue, kindly add following tag
> > Reported-by: kbuild test robot <lkp@intel.com>
> > 
> > All errors (new ones prefixed by >>):
> > 
> > >> ERROR: "__aeabi_uldivmod" [fs/btrfs/btrfs.ko] undefined!
> 
> That does not point to a particular line, but there's
> 
> +	/* If we ended in the middle of a bitmap, reset the trimming flag. */
> +	if (end % (BITS_PER_BITMAP * ctl->unit))
> +		reset_trimming_bitmap(ctl, offset_to_bitmap(ctl, end));
> 
> added and its "u64 % (unsigned long * int)" that could be the cause.

Yeah that seems to be it. I wasn't careful enough with my u64s. I'm
going to send out v4 which should fix this issue and the uninitialized
variable use in patch 4.

Thanks,
Dennis

  reply index

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-20 21:50 [PATCH v3 00/22] btrfs: async discard support Dennis Zhou
2019-11-20 21:51 ` [PATCH 01/22] bitmap: genericize percpu bitmap region iterators Dennis Zhou
2019-11-20 21:51 ` [PATCH 02/22] btrfs: rename DISCARD opt to DISCARD_SYNC Dennis Zhou
2019-11-20 21:51 ` [PATCH 03/22] btrfs: keep track of which extents have been discarded Dennis Zhou
2019-11-20 21:51 ` [PATCH 04/22] btrfs: keep track of cleanliness of the bitmap Dennis Zhou
2019-11-23  0:17   ` kbuild test robot
2019-11-25 13:59     ` David Sterba
2019-11-25 19:37       ` Dennis Zhou [this message]
2019-11-20 21:51 ` [PATCH 05/22] btrfs: add the beginning of async discard, discard workqueue Dennis Zhou
2019-11-20 21:51 ` [PATCH 06/22] btrfs: handle empty block_group removal Dennis Zhou
2019-11-20 21:51 ` [PATCH 07/22] btrfs: discard one region at a time in async discard Dennis Zhou
2019-11-20 21:51 ` [PATCH 08/22] btrfs: add removal calls for sysfs debug/ Dennis Zhou
2019-11-20 21:51 ` [PATCH 09/22] btrfs: make UUID/debug have its own kobject Dennis Zhou
2019-11-20 21:51 ` [PATCH 10/22] btrfs: add discard sysfs directory Dennis Zhou
2019-11-20 21:51 ` [PATCH 11/22] btrfs: track discardable extents for async discard Dennis Zhou
2019-11-20 21:51 ` [PATCH 12/22] btrfs: keep track of discardable_bytes Dennis Zhou
2019-11-20 21:51 ` [PATCH 13/22] btrfs: calculate discard delay based on number of extents Dennis Zhou
2019-11-20 21:51 ` [PATCH 14/22] btrfs: add bps discard rate limit Dennis Zhou
2019-11-20 21:51 ` [PATCH 15/22] btrfs: limit max discard size for async discard Dennis Zhou
2019-11-20 21:51 ` [PATCH 16/22] btrfs: make max async discard size tunable Dennis Zhou
2019-11-20 21:51 ` [PATCH 17/22] btrfs: have multiple discard lists Dennis Zhou
2019-11-20 21:51 ` [PATCH 18/22] btrfs: only keep track of data extents for async discard Dennis Zhou
2019-11-20 21:51 ` [PATCH 19/22] btrfs: keep track of discard reuse stats Dennis Zhou
2019-11-20 21:51 ` [PATCH 20/22] btrfs: add async discard header Dennis Zhou
2019-11-20 21:51 ` [PATCH 21/22] btrfs: increase the metadata allowance for the free_space_cache Dennis Zhou
2019-11-20 21:51 ` [PATCH 22/22] btrfs: make smaller extents more likely to go into bitmaps Dennis Zhou
  -- strict thread matches above, loose matches on Subject: below --
2019-12-14  0:22 [PATCH v6 00/22] btrfs: async discard support Dennis Zhou
2019-12-14  0:22 ` [PATCH 04/22] btrfs: keep track of cleanliness of the bitmap Dennis Zhou
2019-12-09 19:45 [PATCH v5 00/22] btrfs: async discard support Dennis Zhou
2019-12-09 19:45 ` [PATCH 04/22] btrfs: keep track of cleanliness of the bitmap Dennis Zhou
2019-11-25 19:46 [PATCH v4 00/22] btrfs: async discard support Dennis Zhou
2019-11-25 19:46 ` [PATCH 04/22] btrfs: keep track of cleanliness of the bitmap Dennis Zhou
2019-10-23 22:52 [PATCH v2 00/22] btrfs: async discard support Dennis Zhou
2019-10-23 22:52 ` [PATCH 04/22] btrfs: keep track of cleanliness of the bitmap Dennis Zhou
2019-11-08 19:12   ` Josef Bacik

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