Date: Mon, 2 Apr 2007 23:47:17 GMT From: Michael Conlen<meconlen@obfuscated.net> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/111163: nfs_getpages does not restart interrupted system call Message-ID: <200704022347.l32NlHYb067438@www.freebsd.org> Resent-Message-ID: <200704030000.l3300Nhp008629@freefall.freebsd.org>
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>Number: 111163 >Category: kern >Synopsis: nfs_getpages does not restart interrupted system call >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Apr 03 00:00:22 GMT 2007 >Closed-Date: >Last-Modified: >Originator: Michael Conlen >Release: 6.2 >Organization: >Environment: FreeBSD web10.tarhost.com 6.2-RELEASE-p1 FreeBSD 6.2-RELEASE-p1 #7: Tue Mar 20 15:05:34 EDT 2007 root@web10.tarhost.com:/usr/obj/usr/src/sys/WWW i386 >Description: I see this in /var/log/messages Apr 2 18:56:43 web10 kernel: nfs_getpages: error 4 and while a lot of errors should return an error this is just an interrupted system call. I believe this should get restarted. >How-To-Repeat: >Fix: I believe the error is in here but the function that gets called and interrupted is something being pointed to best as I can tell and I have no idea what happens if you just recall it. 152 bp = getpbuf(&nfs_pbuf_freecnt); 153 154 kva = (vm_offset_t) bp->b_data; 155 pmap_qenter(kva, pages, npages); 156 cnt.v_vnodein++; 157 cnt.v_vnodepgsin += npages; 158 159 iov.iov_base = (caddr_t) kva; 160 iov.iov_len = count; 161 uio.uio_iov = &iov; 162 uio.uio_iovcnt = 1; 163 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 164 uio.uio_resid = count; 165 uio.uio_segflg = UIO_SYSSPACE; 166 uio.uio_rw = UIO_READ; 167 uio.uio_td = td; 168 169 error = (nmp->nm_rpcops->nr_readrpc)(vp, &uio, cred); 170 pmap_qremove(kva, npages); 171 172 relpbuf(bp, &nfs_pbuf_freecnt); 173 174 if (error && (uio.uio_resid == count)) { 175 printf("nfs_getpages: error %d\n", error); 176 VM_OBJECT_LOCK(object); 177 vm_page_lock_queues(); 178 for (i = 0; i < npages; ++i) { 179 if (i != ap->a_reqpage) 180 vm_page_free(pages[i]); 181 } 182 vm_page_unlock_queues(); 183 VM_OBJECT_UNLOCK(object); 184 return VM_PAGER_ERROR; 185 } 186 >Release-Note: >Audit-Trail: >Unformatted:
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