Date: Thu, 4 Jun 2009 00:51:59 GMT From: Jordan Newman <jn-freebsdbugs@isprime.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/135237: sendfile() and SF_NODISKIO blocks on NFS files Message-ID: <200906040051.n540pxEX093432@www.freebsd.org> Resent-Message-ID: <200906040100.n541064l042418@freefall.freebsd.org>
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>Number: 135237 >Category: kern >Synopsis: sendfile() and SF_NODISKIO blocks on NFS files >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Jun 04 01:00:06 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Jordan Newman >Release: 7.2 >Organization: ISPrime Inc. >Environment: FreeBSD XXX 7.2-RELEASE FreeBSD 7.2-RELEASE #8: Wed May 20 01:49:25 EDT 2009 root@XXX:/usr/obj/usr/src/sys/1950-64BITRAID-SMP amd64 >Description: Calling sendfile() with the SF_NODISKIO flag, will still block if the descriptor points to a file that is on an NFS mount. In this situation I feel accessing data over the network should be considered "disk io" and it should return EBUSY. This seems to happen on every version of FreeBSD, so I do not believe it to be a regression in FreeBSD 7.2 or a new bug. >How-To-Repeat: any sendfile call such as: sendfile(fd,clientsock,offset,sendsize,&sf,&cnt,SF_NODISKIO); will still block while the NFS lookup occurs. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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