linux-kernel - Re: sys_write() racy for multi-threaded append?

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Message-ID: <f2b55d220703131640p47f441cdk6f213e64eb78f2e3@mail.gmail.com>
Date:	Tue, 13 Mar 2007 16:40:41 -0700
From:	"Michael K. Edwards" <medwards.linux@...il.com>
To:	"Christoph Hellwig" <hch@...radead.org>,
	"Michael K. Edwards" <medwards.linux@...il.com>,
	"David Miller" <davem@...emloft.net>, alan@...rguk.ukuu.org.uk,
	7eggert@....de, dada1@...mosbay.com, linux-kernel@...r.kernel.org
Subject: Re: sys_write() racy for multi-threaded append?

On 3/13/07, Christoph Hellwig <hch@...radead.org> wrote:
> Michael, please stop spreading this utter bullshit _now_.  You're so
> full of half-knowledge that it's not funny anymore, and you try
> to insult people knowing a few magniutes more than you left and right.

Thank you Christoph for that informative response to my comments.  I
take it that you consider read_write.c to be code of the highest
quality and maintainability.  If you have something specific in mind
when you write "utter bullshit" and "half-knowledge", I'd love to hear
it.

Now, for those who still care to respond as if improving the kernel
were a goal that you and I can share, a question:  When
generic_file_llseek needs the inode in order to retrieve the current
file size, it goes through f_mapping (the pagecache entry?) rather
than through f_path.dentry (the dentry cache?).  All other inode
retrievals in read_write.c go through f_path.dentry.  Why?  Or is this
a question that can only be asked on linux-fsdevel?

Cheers,
- Michael
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