Re: [CHECKER] Does sys_sync (ext2, 2.6.x) flush metadata?

[Bartlomiej Zolnierkiewicz]

Hi,

On Thu, 10 Feb 2005 23:59:53 -0800 (PST), Junfeng Yang <yjf@xxxxxxxxxxxx> wrote:
> 
> Hi,
> 
> We're working on a file system checker and have a question regarding what
> sys_sync actually does.  It appears to us that sys_sync should sync both
> data and metadata, and wait until both data and metadata hit the disk
> before it returns.  Is this true for all the file systems (especially
> ext2) for kernel 2.6.x?  I've gotten many "error" traces for ext2, where
> directory entries are not flushed to disk after sys_sync.  In other words,
> even if users do call sys_sync, a crash after sys_sync call can still
> cause file losses.  Is this intended?

I don't know what exactly you are doing but do you remember
about disabling write caching on your disks in case of doing
real hard crashes?

Regards,
Bartlomiej
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/