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SubjectRe: Loop devices under NTFS
>On Tue, Aug 27, 2002 at 05:40:52AM -0700, Adam J. Richter wrote:
>> There are only a few file systems that provide writable files
>> without aops->{prepare,commit}_write. I think they are just tmpfs,
>> ntfs and intermezzo. If all file systems that provided writable files
>> could be expected to provide {prepare,commit}_write, I could eliminate
>> the file_ops->{read,write} code from loop.c.

>This is the wrong level of abstraction. There is no reason why a filesystem
>has to use the pagecache at all.

Are you complaining about something in loop.c, or are you just
saying that you'd like to see some kind of
generic_file_{prepare,commit}_write routines that plain files in all
writable filesystems could use?


>Note that there is a more severe bug in loop.c: it's abuse of
>do_generic_file_read.

Could you please elaborate on this and give an example where
it return incorrect data, deadlock, generate a kernel oops, etc.?

Adam J. Richter __ ______________ 575 Oroville Road
adam@yggdrasil.com \ / Milpitas, California 95035
+1 408 309-6081 | g g d r a s i l United States of America
"Free Software For The Rest Of Us."

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