an interface for filesystem preallocation that doesn't suck?

Eric Sandeen sandeen at
Thu Apr 2 22:00:15 UTC 2009

James Ralston wrote:

> If the latter, is there an interface for fallocate() that doesn't have
> quite as much FAIL as posix_fallocate()?

yes, plain ol' fallocate(2), I think:

       #include <linux/falloc.h>

       long fallocate(int fd, int mode, loff_t offset, loff_t len);

but you need a very recent glibc to get it:

it'd be great if we could get that into F11...

BTW, ext4, xfs, btrfs, and ocfs2 all support ->fallocate.


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