Messages in this thread | | | Date | Thu, 28 Jul 2005 20:50:16 -0700 | From | Andrew Morton <> | Subject | Re: Syncing single filesystem (slow USB writing) |
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Andrey Borzenkov <arvidjaar@mail.ru> wrote: > > Mandrake always mounted USB sticks with sync option; it was effectively noop > except for a patch that implemented limited dsync semantic. > > Now, when full sync support for FATis in kernel, moutning with sync became > real pain. Writing speed dropped from 3MB/s to 30KB/s in my case (and I am > not alone).
Unfortunately I think we're just going to have to live with that. It is right that fatfs behaves as it does, and unfortunate that some distros will operate slowly.
For reference: how does mandrake implement this? Just in /etc/fstab? How should we tell other people to fix this?
> One idea how to improve situation - continue to mount with dsync (having > basically old case) and do frequent sync of filesystem (this culd be started > as HAL callout or whatever). Unfortunately, I could not find a way to request > a sync (flush) of single mount point or block device. Have I missed > something?
It's trivial to do in-kernel but no, I'm afraid there isn't a userspace interface for this.
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