Date: Sun, 19 Sep 1999 10:50:46 +0930 From: Greg Lehey <grog@lemis.com> To: Matt Dillon <dillon@FreeBSD.org> Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: User block device access (was: cvs commit: src/sys/miscfs/specfs spec_vnops.c src/sys/sys vnode.h src/sys/kern vfs_subr.c) Message-ID: <19990919105045.T55065@freebie.lemis.com> In-Reply-To: <199909170610.XAA56084@freefall.freebsd.org>; from Matt Dillon on Thu, Sep 16, 1999 at 11:10:28PM -0700 References: <199909170610.XAA56084@freefall.freebsd.org>
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On Thursday, 16 September 1999 at 23:10:28 -0700, Matt Dillon wrote: > dillon 1999/09/16 23:10:28 PDT > > Modified files: > sys/miscfs/specfs spec_vnops.c > sys/sys vnode.h > sys/kern vfs_subr.c > Log: > Add vfs.enable_userblk_io sysctl to control whether user reads and writes > to buffered block devices are allowed. The default is to be backwards > compatible, i.e. reads and writes are allowed. > > The idea is for a larger crowd to start running with this disabled and > see what problems, if any, crop up, and then to change the default to > off and see if any problems crop up in the next 6 months prior to > potentially removing support entirely. There are still a few people, > Julian and myself included, who believe the buffered block device > access from usermode to be useful. Add me to that list. What reasons have been given for disabling it? Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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