linux-kernel - Re: [GIT PULL] bcachefs

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Date:   Mon, 26 Jun 2023 22:05:25 -0400
From:   Kent Overstreet <kent.overstreet@...ux.dev>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-bcachefs@...r.kernel.org,
        Christoph Hellwig <hch@....de>
Subject: Re: [GIT PULL] bcachefs

On Mon, Jun 26, 2023 at 07:13:54PM -0600, Jens Axboe wrote:
> Doesn't reproduce for me with XFS. The above ktest doesn't work for me
> either:

It just popped for me on xfs, but it took half an hour or so of looping
vs. 30 seconds on bcachefs.

> ~/git/ktest/build-test-kernel run -ILP ~/git/ktest/tests/bcachefs/xfstests.ktest/generic/388
> realpath: /home/axboe/git/ktest/tests/bcachefs/xfstests.ktest/generic/388: Not a directory
> Error 1 at /home/axboe/git/ktest/build-test-kernel 262 from: ktest_test=$(realpath "$1"), exiting
> 
> and I suspect that should've been a space, but:
> 
> ~/git/ktest/build-test-kernel run -ILP ~/git/ktest/tests/bcachefs/xfstests.ktest generic/388
> Running test xfstests.ktest on m1max at /home/axboe/git/linux-block
> No tests found
> TEST FAILED

doh, this is because we just changed it to pick up the list of tests
from the test lists that fstests generated.

Go into ktest/tests/xfstests and run make and it'll work. (Doesn't
matter if make fails due to missing libraries, it'll re-run make inside
the VM where the dependencies will all be available).

> As a side note, I do get these when compiling:
> 
> fs/bcachefs/alloc_background.c: In function ‘bch2_check_alloc_info’:
> fs/bcachefs/alloc_background.c:1526:1: warning: the frame size of 2640 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>  1526 | }
>       | ^
> fs/bcachefs/reflink.c: In function ‘bch2_remap_range’:
> fs/bcachefs/reflink.c:388:1: warning: the frame size of 2352 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>   388 | }

yeah neither of those are super critical because they run top of the
stack, but they do need to be addressed. might be time to start heap
allocating btree_trans.