Date: Sat, 4 Sep 2021 15:08:59 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: should copy_file_range(2) have a non-Linux flag? Message-ID: <YQXPR0101MB0968623581E772150D24F337DDD09@YQXPR0101MB0968.CANPRD01.PROD.OUTLOOK.COM>
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Hi, I just proposed a patch for VOP_COPY_FILE_RANGE(9) that adds a kernel only flag to specify "return after 1second with a partial copy". I'd like to use it for the NFSv4.2 server, so that the RPC replies in a reasonable time frame. https://reviews.freebsd.org/D31829 The question that came up is... "should this flag be visible to userland?" The only argument I can think of against doing this is that it makes the syscall non-Linux compatible. (Also, the NFS server requirement seems a bit of an oddball and I'm not sure an application would want this capability?) Do you think this flag should be exposed to userland (ie the syscall)? rick
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