From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd von Egidy Subject: Re: [patch 0/2] virtio-blk async IO Date: Sat, 19 Apr 2008 00:57:58 +0200 Message-ID: <200804190057.59404.lists@egidy.de> References: <20080418222040.988332630@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Marcelo Tosatti , Avi Kivity To: kvm-devel@lists.sourceforge.net Return-path: In-Reply-To: <20080418222040.988332630@localhost.localdomain> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org Hi Marcelo, > Use the asynchronous version of block IO functions, otherwise guests can > block for long periods of time waiting for the operations to complete. just tried these patches. Results are similar to the last ones: the guest comes up fine but after running 2 or 3 minutes of bonnie++ the guest-vm hangs. This time I used screen on the guest console to try switching to another process - hanging too. Here is the kvm_stat --once output: efer_reload 0 0 exits 3325114 196 fpu_reload 185671 0 halt_exits 18692 29 halt_wakeup 24807 0 host_state_reload 1387308 59 insn_emulation 1924291 130 insn_emulation_fail 0 0 invlpg 0 0 io_exits 350020 30 irq_exits 225446 3 irq_window 0 0 mmio_exits 917561 0 mmu_cache_miss 55436 0 mmu_flooded 64416 0 mmu_pde_zapped 46914 0 mmu_pte_updated 565547 0 mmu_pte_write 650181 0 mmu_recycled 0 0 mmu_shadow_zapped 64416 0 pf_fixed 1229672 0 pf_guest 94338 0 remote_tlb_flush 0 0 request_irq 0 0 signal_exits 1 0 tlb_flush 602678 4 Kind regards, Gerd -- Address (better: trap) for people I really don't want to get mail from: james(at)cactusamerica.com ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone