Messages in this thread |  | | Date | Sun, 31 Dec 2000 02:02:34 +0100 | From | Andrea Arcangeli <> | Subject | Re: [RFC] Generic deferred file writing |
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On Sat, Dec 30, 2000 at 03:00:43PM -0700, Eric W. Biederman wrote: > To get ENOSPC handling 99% correct all we need to do is decrement a counter, > that remembers how many disks blocks are free. If we need a better
Yes, we need to add one field to the in-core superblock to do this accounting.
> estimate than just the data blocks it should not be hard to add an > extra callback to the filesystem.
Yes, I was thinking at this callback too. Such a callback is nearly the only support we need from the filesystem to provide allocate on flush. Allocate on flush is a pagecache issue, not really a filesystem issue. When a filesystem doesn't implement such callback we can simply get_block(create) at pagecache creation time as usual.
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