From: Kurt Garloff <garloff@suse.de>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Andrea Arcangeli <andrea@suse.de>, linux-kernel@vger.kernel.org
Subject: Re: nfs MAP_SHARED corruption fix
Date: Tue, 8 May 2001 17:38:47 +0200 [thread overview]
Message-ID: <20010508173847.I22739@garloff.suse.de> (raw)
In-Reply-To: <20010508160050.F543@athlon.random> <shs3dafvpcx.fsf@charged.uio.no>
In-Reply-To: <shs3dafvpcx.fsf@charged.uio.no>; from trond.myklebust@fys.uio.no on Tue, May 08, 2001 at 05:21:02PM +0200
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On Tue, May 08, 2001 at 05:21:02PM +0200, Trond Myklebust wrote:
> Could you instead detail exactly which corruption problem you are
> trying to fix?
int fd = open (name, O_RDWR);
char* adr = (char*) mmap (0, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
/* write to *adr through *(ard+len-1) */
/* Try adding here: msync (adr, len, MS_SYNC); */
munmap (adr, len);
close (fd);
The code works on files on local harddisks and on NFS volumes on a 2.2
kernel, but breaks on NFS drives on a 2.4.4 kernel.
msync() works around the bug.
Andrea's patch did help as well.
Regards,
--
Kurt Garloff <garloff@suse.de> Eindhoven, NL
GPG key: See mail header, key servers Linux kernel development
SuSE GmbH, Nuernberg, FRG SCSI, Security
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next prev parent reply other threads:[~2001-05-08 15:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-08 14:00 nfs MAP_SHARED corruption fix Andrea Arcangeli
2001-05-08 15:21 ` Trond Myklebust
2001-05-08 15:38 ` Kurt Garloff [this message]
2001-05-09 7:30 ` Trond Myklebust
2001-05-09 13:25 ` Andrea Arcangeli
2001-05-09 22:02 ` Marcelo Tosatti
2001-05-10 0:08 ` Andrea Arcangeli
2001-05-09 22:38 ` Marcelo Tosatti
2001-05-10 1:16 ` Andrea Arcangeli
2001-05-10 0:00 ` Marcelo Tosatti
2001-05-10 10:11 ` Trond Myklebust
2001-05-10 10:14 ` Trond Myklebust
2001-05-09 2:48 ` Andrea Arcangeli
2001-05-09 7:00 ` Trond Myklebust
-- strict thread matches above, loose matches on Subject: below --
2001-05-09 10:55 Kurt Garloff
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