From: Guoqing Jiang <guoqing.jiang@linux.dev>
To: Song Liu <song@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>,
Christoph Hellwig <hch@infradead.org>,
linux-raid <linux-raid@vger.kernel.org>,
linux-block@vger.kernel.org
Subject: Re: [PATCH V4] raid1: ensure write behind bio has less than BIO_MAX_VECS sectors
Date: Wed, 25 Aug 2021 08:44:18 +0800 [thread overview]
Message-ID: <01dec1bc-5e3a-4237-6280-f0a480e6231f@linux.dev> (raw)
In-Reply-To: <CAPhsuW6mivBeA0uYGT-Z9UR7h_B=4Mp+BGqzrAW9BmNysQcGTw@mail.gmail.com>
On 8/25/21 5:55 AM, Song Liu wrote:
> On Mon, Aug 23, 2021 at 6:17 PM Guoqing Jiang <guoqing.jiang@linux.dev> wrote:
>> From: Guoqing Jiang <jiangguoqing@kylinos.cn>
>>
>> We can't split write behind bio with more than BIO_MAX_VECS sectors,
>> otherwise the below call trace was triggered because we could allocate
>> oversized write behind bio later.
>>
>> [ 8.097936] bvec_alloc+0x90/0xc0
>> [ 8.098934] bio_alloc_bioset+0x1b3/0x260
>> [ 8.099959] raid1_make_request+0x9ce/0xc50 [raid1]
>> [ 8.100988] ? __bio_clone_fast+0xa8/0xe0
>> [ 8.102008] md_handle_request+0x158/0x1d0 [md_mod]
>> [ 8.103050] md_submit_bio+0xcd/0x110 [md_mod]
>> [ 8.104084] submit_bio_noacct+0x139/0x530
>> [ 8.105127] submit_bio+0x78/0x1d0
>> [ 8.106163] ext4_io_submit+0x48/0x60 [ext4]
>> [ 8.107242] ext4_writepages+0x652/0x1170 [ext4]
>> [ 8.108300] ? do_writepages+0x41/0x100
>> [ 8.109338] ? __ext4_mark_inode_dirty+0x240/0x240 [ext4]
>> [ 8.110406] do_writepages+0x41/0x100
>> [ 8.111450] __filemap_fdatawrite_range+0xc5/0x100
>> [ 8.112513] file_write_and_wait_range+0x61/0xb0
>> [ 8.113564] ext4_sync_file+0x73/0x370 [ext4]
>> [ 8.114607] __x64_sys_fsync+0x33/0x60
>> [ 8.115635] do_syscall_64+0x33/0x40
>> [ 8.116670] entry_SYSCALL_64_after_hwframe+0x44/0xae
>>
>> Thanks for the comment from Christoph.
>>
>> [1]. https://bugs.archlinux.org/task/70992
>>
>> Reported-by: Jens Stutte <jens@chianterastutte.eu>
>> Tested-by: Jens Stutte <jens@chianterastutte.eu>
>> Reviewed-by: Christoph Hellwig <hch@lst.de>
>> Signed-off-by: Guoqing Jiang <jiangguoqing@kylinos.cn>
> I am confused. Which tree does this apply to?
Sorry, I forgot to mention it in this version (actually it is v4). It
depends
on commit 018eca456c4b4dca56aaf1ec27f309c74d0fe246 in block tree
for-next branch, so it would be better to be picked by block tree for now
to avoid compile issue, or after you rebase md tree from block tree with
that commit included.
Thanks,
Guoqing
next prev parent reply other threads:[~2021-08-25 0:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-24 1:16 [PATCH] raid1: ensure write behind bio has less than BIO_MAX_VECS sectors Guoqing Jiang
2021-08-24 21:55 ` Song Liu
2021-08-25 0:44 ` Guoqing Jiang [this message]
2021-08-26 16:16 ` [PATCH V4] " Song Liu
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