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List:       busybox
Subject:    Re: [BusyBox] Re: [PATCH] BLKFLSBUF on ramdisks
From:       Todd Poynor <tpoynor () mvista ! com>
Date:       2004-05-28 19:06:30
Message-ID: 40B78DB6.1070003 () mvista ! com
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Bill C. Riemers wrote:
> Does this problem also effect the 2.4 kernels?
> 
> I'm just wondering, because it sounds like a possible explination for
> strange errors occurring with /dev/cobd? in coLinux, especially when used as
> swap devices.  Basically /dev/cobd? are simmular to ramdisks, but they
> refere to files mmap'ed under Windows.  They work fairly reliable, until
> someone does something like "swapoff -a;swapon -a".  However, coLinux is
> only used with 2.4 kernels, so if the problem does not effect 2.4 kernels,
> then this is not the cause.

Yes, Matt Porter previously determined that this behavior changed 
sometime after 2.4.2 and on or before 2.4.17, when rd.c was modified to 
perform a truncate_inode_pages() for BLKFLSBUF (could track down the 
date/revision more accurately if you're interested).

-- 
Todd


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