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can be opprobriously slow if created with '--nosync'. One of the ways cluster mirrors coordinate I/O and recovery amoung the different machines is by the use of the log function 'is_remote_recovering()' which lets nodes know if a region they wish to perform a write on is currently being recovered on another node. If the region is being recovered, the I/O is delayed. The 'is_remote_recovering' routine has been optimized to avoid the deluge of requests that would be issued to the userspace log server by maintaining a marker of how far the recovery has gotten. It can then immediately return 'not recovering' if the region being inquired about is less than this mark. Additionally, if the region of concern is greater than the mark, the function will limit the number of transmissions to userspace by assuming the region /is/ being recovered when skipping the transmission. This limits the amount of processing and updates the mark in 1/4 sec time steps. This patch fixes a problem where 'the mark' is not being updated because of faulty logic in the userspace log daemon. When '--nosync' is used to create a cluster mirror, the userspace log daemon never has a chance to update the mark in the normal way. The fix is to set the mark to "complete" if the mirror was created with the --nosync flag.
This tree contains the LVM2 and device-mapper tools and libraries. For more information about LVM2 read the changelog in the WHATS_NEW file. Installation instructions are in INSTALL. There is no warranty - see COPYING and COPYING.LIB. Tarballs are available from: ftp://sources.redhat.com/pub/lvm2/ To access the CVS tree use: cvs -d :pserver:cvs@sources.redhat.com:/cvs/lvm2 login CVS password: cvs cvs -d :pserver:cvs@sources.redhat.com:/cvs/lvm2 co LVM2 Mailing list for general discussion related to LVM2: linux-lvm@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm Mailing list for LVM2 development, patches and commits: lvm-devel@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm Mailing list for device-mapper development, including kernel patches and multipath-tools: dm-devel@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/dm-devel