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It is also about any IO > against a locked file if such a file is locked through another file > handle. Right? Yes that was implied, the write was a simple example to illustrate. I'll update to make it more generic: Another important side-effect is that the locks are not advisory anymore: any IO on a locked file will always fail with EACCES, even when done from a separate file descriptor. If you have comments please provide direct text suggestion to save time. Cheers, --=20 Aur=C3=A9lien Aptel / SUSE Labs Samba Team GPG: 1839 CB5F 9F5B FB9B AA97 8C99 03C8 A49B 521B D5D3 SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 N=C3=BCrnberg, D= E GF: Felix Imend=C3=B6rffer, Mary Higgins, Sri Rasiah HRB 247165 (AG M=C3=BC= nchen)