Re: 2.6.20: stripe_cache_size goes boom with 32mb

2007-02-23 Thread Dan Williams
On 2/23/07, Justin Piszcz <[EMAIL PROTECTED]> wrote: I have 2GB On this machine. For me, 8192 seems to be the sweet spot, I will probably keep it at 8mb. Just a note stripe_cache_size = 8192 = 192MB with six disks. The calculation is: stripe_cache_size * num_disks * PAGE_SIZE = stripe_cache_s

Re: 2.6.20: stripe_cache_size goes boom with 32mb

2007-02-23 Thread Jan Engelhardt
On Feb 23 2007 06:41, Justin Piszcz wrote: > > I was able to Alt-SysRQ+b but I could not access the console/X/etc, it > appeared > to be frozen. No sysrq+t? (Ah, unblanking might hang.) Well, netconsole/serial to the rescue, then ;-) Jan -- - To unsubscribe from this list: send the line "unsu

Re: 2.6.20: stripe_cache_size goes boom with 32mb

2007-02-23 Thread Jason Rainforest
Hi Justin, I'm not a RAID or kernel developer, but .. do you have enough RAM to support a 32mb stripe_cache_size?! Here on my 7*250Gb SW RAID5 array, decreasing a stripe_cache_size of 8192 to 4096 frees up no less than 120mb of RAM. Using that as a calculation tool, a 32mb stripe_cache_size would

Re: 2.6.20: stripe_cache_size goes boom with 32mb

2007-02-23 Thread Justin Piszcz
I have 2GB On this machine. For me, 8192 seems to be the sweet spot, I will probably keep it at 8mb. On Fri, 23 Feb 2007, Jason Rainforest wrote: Hi Justin, I'm not a RAID or kernel developer, but .. do you have enough RAM to support a 32mb stripe_cache_size?! Here on my 7*250Gb SW RAID5 arr