Subject: Re: LK_SHARED for VFS_VGET/FHTOVP
To: Jason Thorpe <email@example.com>
From: Bill Studenmund <firstname.lastname@example.org>
Date: 05/26/2004 16:43:20
Content-Type: text/plain; charset=us-ascii
On Wed, May 26, 2004 at 02:46:10PM -0700, Jason Thorpe wrote:
> On May 26, 2004, at 12:45 PM, YAMAMOTO Takashi wrote:
> >are you suggesting file PRs about each dependency on biglock?
> No. Bill is asserting that various VOPs don't work correctly with=20
> SHARED locks because they modify data structure that are normally=20
> protected by an EXCLUSIVE lock. I want him to file PRs on those=20
> specific problems, rather than making a blanket statement that the=20
> SHARED locks are bad.
Sorry, I thought I was saying, "SHARED locks used on vnodes are currently=
bad." In general shared locks are good. And I'd like us to use them with=20
vnodes. However we need to be more careful about it than we have been.
Also, unfortunately, Chuck's the person who caused the problem but I'm not=
sure if he's the best person to fix it. YAMAMOTO, Darrin, and I are=20
probably the folks who need to fix it.
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