search for: read_exact

...t read_extract does not handle EAGAIN/EWOULDBLOCK (both can be returned on non blocking socket depending on file type and Unix/Linux version) leading to a failure. Does this make sense or is it impossible ?? Also note that rdexact (xc_domain_restore.c) handle data timeout but we can still block in read_exact called by xc_tmem_restore/xc_tmem_restore_extra. Last note on rdexact, isn''t 1 second (HEARTBEAT_MS) too small if there are network problems? Frediano

...ed long hvirt_start; + +/* #levels of page tables used by the currrent guest */ +static unsigned int pt_levels; + +/* total number of pages used by the current guest */ +static unsigned long max_pfn; + +/* A table mapping each PFN to its new MFN. */ +static xen_pfn_t *p2m = NULL; + +static ssize_t +read_exact(int fd, void *buf, size_t count) +{ + int r = 0, s; + unsigned char *b = buf; + + while (r < count) { + s = read(fd, &b[r], count - r); + if ((s == -1) && (errno == EINTR)) + continue; + if (s <= 0) { + break; + } +...

...ing to migrate (xm migrate) a guest from one host to another, it simply fails. On the source host the virtual machine gets destroyed without any warning message - on the destination host I see the following error message in /var/log/xen/xend.log [2009-03-10 08:01:22 9846] ERROR (XendCheckpoint:52) read_exact: EOF trying to read 21 (buf='') and a python trace [2009-03-10 08:01:22 9846] ERROR (XendDomain:1136) Restore failed Traceback (most recent call last): File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomain.py", line 1134, in domain_restore_fd return XendCheckpoint.restor...

...g + memset(&domctl, 0, sizeof(domctl)); + domctl.domain = dom; + domctl.cmd = XEN_DOMCTL_restoredomain; + frc = do_domctl(xc_handle, &domctl); + if ( frc != 0 ) + { + ERROR("Unable to set flag of restore."); + goto out; + } if ( read_exact(io_fd, &p2m_size, sizeof(unsigned long)) ) { @@ -1120,6 +1130,8 @@ /* restore saved vcpu_info and arch specific info */ MEMCPY_FIELD(new_shared_info, old_shared_info, vcpu_info); + MEMCPY_FIELD(new_shared_info, old_shared_info, wc_nsec); + MEMCPY_FIELD(new_shared_info, ol...

...39;, ''domid'': ''5'', ''cpu/0/availability'': ''online'', ''memory/target'': ''512000'', ''store/port'': ''1''} [2007-09-27 09:32:01 xend 27175] ERROR (XendCheckpoint:48) read_exact: EOF trying to read 8 (buf='''') [2007-09-27 09:32:01 xend.XendDomainInfo 27175] DEBUG (XendDomainInfo:1463) XendDomainInfo.destroy: domid=5 [2007-09-27 09:32:01 xend.XendDomainInfo 27175] DEBUG (XendDomainInfo:1471) XendDomainInfo.destroyDomain(5) [2007-09-27 09:32:01 xend 27175] E...

...domain_pause(self.domid) Error: (3, ''No such process'') I have traced back the error to the following code snippet in tools/libxc/xc_linux_restore.c file ~ this is Xen 3.0.3, included in RHEL 5.5: /* Read first entry of P2M list, or extended-info signature (~0UL). */ if (!read_exact(io_fd, p2m_frame_list, sizeof(long))) { ERR("read extended-info signature failed"); goto out; } However, I am not sure under what circumstances that expression could return false & trigger the error message. Any hint will be greatly appreciated! Thanks! -- Juan...

..._domctl(xc_handle, &domctl); + if ( frc != 0 ) + { + ERROR("Unable to set flag of restore."); + goto out; + } if ( read_exact(io_fd, &p2m_size, sizeof(unsigned long)) ) { @@ -1120,6 +1130,8 @@ /* restore saved vcpu_info and arch specific info */ MEMCPY_FIELD(new_shared_info, old_shared_info,...

Hi there, We are using latest version of XCP on 6 hosts. While issuing VM.start or VM.start_on xmlrpc functional call , it says : {''Status'': ''Failure'', ''ErrorDescription'': [''SESSION_INVALID'', ''OpaqueRef:cfb6df14-387d-40a1-cc27-d5962cba7712'']} However if I put VM.start in a loop maybe after

This patch series copies the core of the tapdisk process from blktap2, with updates coming from blktap2.5. Signed-off-by: Thanos Makatos <thanos.makatos@citrix.com>

The following series of 10 patches is a merge of the xenfb and xenconsoled functionality into the qemu-dm code. The general approach taken is to have qemu-dm provide two machine types - one for xen paravirt, the other for fullyvirt. For compatability the later is the default. The goals overall are to kill LibVNCServer, remove alot of code duplication and/or parallel impls of the same concepts, and