Date: Fri, 03 Aug 2007 14:29:00 +0800 From: LI Xin <delphij@delphij.net> To: Xin LI <delphij@FreeBSD.ORG> Cc: cvs-src@FreeBSD.ORG, src-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/sys/fs/tmpfs tmpfs.h tmpfs_subr.c Message-ID: <46B2CB2C.7030504@delphij.net> In-Reply-To: <200708030624.l736OV3b043646@repoman.freebsd.org> References: <200708030624.l736OV3b043646@repoman.freebsd.org>
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[-- Attachment #1 --]
Xin LI wrote:
> delphij 2007-08-03 06:24:31 UTC
>
> FreeBSD src repository
>
> Modified files:
> sys/fs/tmpfs tmpfs.h tmpfs_subr.c
> Log:
> MFp4 - Refine locking to eliminate some potential race/panics:
>
> - Copy before testing a pointer. This closes a race window.
> - Use msleep with the node interlock instead of tsleep.
> - Do proper locking around access to tn_vpstate.
> - Assert vnode VOP lock for dir_{atta,de}tach to capture
> inconsistent locking.
>
> Suggested by: kib
> Submitted by: delphij
> Reviewed by: Howard Su
> Approved by: re (tmpfs blanket)
Should have mentioned that this is done in response of pho@'s stress
test. Thanks goes to him for all these hard work!
Cheers,
--
Xin LI <delphij@delphij.net> http://www.delphij.net/
FreeBSD - The Power to Serve!
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