lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <29bfcfc7-62b0-3876-78ce-f7ebe3506eb6@huaweicloud.com>
Date: Thu, 4 Jan 2024 20:19:05 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Jan Kara <jack@...e.cz>, Yu Kuai <yukuai1@...weicloud.com>
Cc: axboe@...nel.dk, roger.pau@...rix.com, colyli@...e.de,
 kent.overstreet@...il.com, joern@...ybastard.org, miquel.raynal@...tlin.com,
 richard@....at, vigneshr@...com, sth@...ux.ibm.com, hoeppner@...ux.ibm.com,
 hca@...ux.ibm.com, gor@...ux.ibm.com, agordeev@...ux.ibm.com,
 jejb@...ux.ibm.com, martin.petersen@...cle.com, clm@...com,
 josef@...icpanda.com, dsterba@...e.com, viro@...iv.linux.org.uk,
 brauner@...nel.org, nico@...xnic.net, xiang@...nel.org, chao@...nel.org,
 tytso@....edu, adilger.kernel@...ger.ca, jack@...e.com,
 konishi.ryusuke@...il.com, willy@...radead.org, akpm@...ux-foundation.org,
 hare@...e.de, p.raghav@...sung.com, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
 linux-bcache@...r.kernel.org, linux-mtd@...ts.infradead.org,
 linux-s390@...r.kernel.org, linux-scsi@...r.kernel.org,
 linux-bcachefs@...r.kernel.org, linux-btrfs@...r.kernel.org,
 linux-fsdevel@...r.kernel.org, linux-erofs@...ts.ozlabs.org,
 linux-ext4@...r.kernel.org, linux-nilfs@...r.kernel.org,
 yi.zhang@...wei.com, yangerkun@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH RFC v3 for-6.8/block 02/17] xen/blkback: use bdev api in
 xen_update_blkif_status()

Hi, Jan!

在 2024/01/04 19:06, Jan Kara 写道:
> On Thu 21-12-23 16:56:57, Yu Kuai wrote:
>> From: Yu Kuai <yukuai3@...wei.com>
>>
>> Avoid to access bd_inode directly, prepare to remove bd_inode from
>> block_devcie.
>>
>> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
>> ---
>>   drivers/block/xen-blkback/xenbus.c | 3 +--
>>   1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
>> index e34219ea2b05..e645afa4af57 100644
>> --- a/drivers/block/xen-blkback/xenbus.c
>> +++ b/drivers/block/xen-blkback/xenbus.c
>> @@ -104,8 +104,7 @@ static void xen_update_blkif_status(struct xen_blkif *blkif)
>>   		xenbus_dev_error(blkif->be->dev, err, "block flush");
>>   		return;
>>   	}
>> -	invalidate_inode_pages2(
>> -			blkif->vbd.bdev_handle->bdev->bd_inode->i_mapping);
>> +	invalidate_bdev(blkif->vbd.bdev_handle->bdev);
> 
> This function uses invalidate_inode_pages2() while invalidate_bdev() ends
> up using mapping_try_invalidate() and there are subtle behavioral
> differences between these two (for example invalidate_inode_pages2() tries
> to clean dirty pages using the ->launder_folio method). So I think you'll
> need helper like invalidate_bdev2() for this.

Thanks for reviewing this patch, I know the differenct between then,
what I don't understand is that why using invalidate_inode_pages2()
here. sync_blockdev() is just called and 0 is returned, I think in this
case it's safe to call invalidate_bdev() directly, or am I missing
other things?

Thanks,
Kuai

> 
> 								Honza
> 


Powered by blists - more mailing lists