-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Edward Shishkin wrote: >> <<< >> If the offset+ len is beyond the current file size, then >> posix_fallocate() shall adjust the file size to offset+ len. Otherwise, >> the file size shall not be changed. >> > > fallocate (2) is something different from posix_fallocate: > > "...This default behavior closely resembles the behavior > of the posix_fallocate(3) library function, and is intended > as a method of optimally implementing that function." If you overincrement file size counter, the only way for glibc to correctly implement is to ftruncate after fallocate . It doesn't look like an optimal implementation of posix_fallocate (2 system calls). It also doesn't look like something glibc would do. It currently doesn't. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQEcBAEBAgAGBQJKAfwBAAoJEE6tnN0aWvw3NQAH/2XFOZE/9MBAxySxOyNY9Gft ttotQ4+g7SuKX47tQzskcWde3qbofEYzrsF/ADebjczEwbiKcZaJwlLzqL1X6siC IWzBS8hIWbbKkyF2erQJP3QZEJq/IwRCK6bOj8EJckGJ6q6tLCIasXGs+GOAjhrB 1NWjDfprXP5M4s1xvG9KRH4Lo38Bz4/5w7ZGqGuXOy+M21ZHim+o9Tbkp7LaV9KP OHqxgXV6tpHHv+Ai16cR1cJzY8XAIZ6EsL4lfpw7nZGlgRC+snccNdyoN3MltFOG fbqIxrcPb8jL+3sAY+F1EK9oOKrCjQhY8VKxksy++M8+uP7OmgRiRkPyNewbYlw= =fY9t -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
