On Tue, 2005-03-01 at 19:22 +0900, FUJITA Tomonori wrote: > From: Arjan van de Ven <[EMAIL PROTECTED]> > Subject: [Iscsitarget-devel] Re: [ANNOUNCE] iSCSI enterprise target software > Date: Tue, 01 Mar 2005 10:46:03 +0100 > > > fsync or msync() ? I would imagine the target mmaping it's backend in > > userspace and using msync() to kick off IO. At which point it's not that > > much different from the control you do of the pagecache from inside the > > kernel... > > Can we avoid calling mmap() and munmap() repeatedly with large disk?
my server has 512Gb address space with 2.6.9/2.6.10, and a lot more than that with the 2.6.11 kernel (4 level page tables rock). So the answer would be yes. (and on old servers without 64 bit, you indeed need to mmap/munmap lazily to create a window, but I suspect that the 3 Gb of address space you have there can be managed smart to minimize the number of unmaps if you really try) - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
