Re: 2.6.24 says "serial8250: too much work for irq4" a lot.

2008-02-07 Thread Rob Landley
On Thursday 07 February 2008 15:19:39 H. Peter Anvin wrote: > Rob Landley wrote: > > Specifically, qemu isn't paravirtualized, it's fully virtualized. The > > same kernel can run on real hardware just fine. (Sort of the point of > > the project...) > > > > I can yank the warning for the kernels

Re: 2.6.24 says "serial8250: too much work for irq4" a lot.

2008-02-07 Thread H. Peter Anvin
Rob Landley wrote: Specifically, qemu isn't paravirtualized, it's fully virtualized. The same kernel can run on real hardware just fine. (Sort of the point of the project...) I can yank the warning for the kernels I build (or set PASS_LIMIT to 999), but I'd rather not carry any more

Re: 2.6.24 says "serial8250: too much work for irq4" a lot.

2008-02-07 Thread H. Peter Anvin
Rob Landley wrote: Specifically, qemu isn't paravirtualized, it's fully virtualized. The same kernel can run on real hardware just fine. (Sort of the point of the project...) I can yank the warning for the kernels I build (or set PASS_LIMIT to 999), but I'd rather not carry any more

Re: 2.6.24 says "serial8250: too much work for irq4" a lot.

2008-02-07 Thread Rob Landley
On Thursday 07 February 2008 11:37:12 H. Peter Anvin wrote: > > actually, the way i solved it for qemu+KVM+paravirt was to just turn off > > this rather silly check in the serial driver if inside a paravirt guest. > > When we are emulated then the serial 'hardware' is totally reliable and > > we

Re: 2.6.24 says "serial8250: too much work for irq4" a lot.

2008-02-07 Thread H. Peter Anvin
Ingo Molnar wrote: * H. Peter Anvin <[EMAIL PROTECTED]> wrote: (If it's a qemu issue, I can go bother them. It's possible that qemu isn't delivering interrupts as often as it expects, since that's limited by the granularity of the host timer; I know the clock in qemu can run a bit slow

Re: 2.6.24 says "serial8250: too much work for irq4" a lot.

2008-02-07 Thread Ingo Molnar
* H. Peter Anvin <[EMAIL PROTECTED]> wrote: >> (If it's a qemu issue, I can go bother them. It's possible that qemu >> isn't delivering interrupts as often as it expects, since that's >> limited by the granularity of the host timer; I know the clock in >> qemu can run a bit slow because it

Re: 2.6.24 says serial8250: too much work for irq4 a lot.

2008-02-07 Thread Ingo Molnar
* H. Peter Anvin [EMAIL PROTECTED] wrote: (If it's a qemu issue, I can go bother them. It's possible that qemu isn't delivering interrupts as often as it expects, since that's limited by the granularity of the host timer; I know the clock in qemu can run a bit slow because it only gets

Re: 2.6.24 says serial8250: too much work for irq4 a lot.

2008-02-07 Thread Rob Landley
On Thursday 07 February 2008 11:37:12 H. Peter Anvin wrote: actually, the way i solved it for qemu+KVM+paravirt was to just turn off this rather silly check in the serial driver if inside a paravirt guest. When we are emulated then the serial 'hardware' is totally reliable and we should

Re: 2.6.24 says serial8250: too much work for irq4 a lot.

2008-02-07 Thread H. Peter Anvin
Rob Landley wrote: Specifically, qemu isn't paravirtualized, it's fully virtualized. The same kernel can run on real hardware just fine. (Sort of the point of the project...) I can yank the warning for the kernels I build (or set PASS_LIMIT to 999), but I'd rather not carry any more

Re: 2.6.24 says serial8250: too much work for irq4 a lot.

2008-02-07 Thread H. Peter Anvin
Rob Landley wrote: Specifically, qemu isn't paravirtualized, it's fully virtualized. The same kernel can run on real hardware just fine. (Sort of the point of the project...) I can yank the warning for the kernels I build (or set PASS_LIMIT to 999), but I'd rather not carry any more

Re: 2.6.24 says serial8250: too much work for irq4 a lot.

2008-02-07 Thread H. Peter Anvin
Ingo Molnar wrote: * H. Peter Anvin [EMAIL PROTECTED] wrote: (If it's a qemu issue, I can go bother them. It's possible that qemu isn't delivering interrupts as often as it expects, since that's limited by the granularity of the host timer; I know the clock in qemu can run a bit slow

Re: 2.6.24 says serial8250: too much work for irq4 a lot.

2008-02-07 Thread Rob Landley
On Thursday 07 February 2008 15:19:39 H. Peter Anvin wrote: Rob Landley wrote: Specifically, qemu isn't paravirtualized, it's fully virtualized. The same kernel can run on real hardware just fine. (Sort of the point of the project...) I can yank the warning for the kernels I build (or

Re: 2.6.24 says "serial8250: too much work for irq4" a lot.

2008-02-05 Thread H. Peter Anvin
Rob Landley wrote: When running a 2.6.24 kernel built for x86-64 under qemu via serial console, doing CPU-intensive things that also produce a lot of output (such as compiling software) tends to produce the error message in the title. Anybody have a clue why? It doesn't seem to cause an

2.6.24 says "serial8250: too much work for irq4" a lot.

2008-02-05 Thread Rob Landley
When running a 2.6.24 kernel built for x86-64 under qemu via serial console, doing CPU-intensive things that also produce a lot of output (such as compiling software) tends to produce the error message in the title. Anybody have a clue why? It doesn't seem to cause an actual problem, but it's

Re: 2.6.24 says serial8250: too much work for irq4 a lot.

2008-02-05 Thread H. Peter Anvin
Rob Landley wrote: When running a 2.6.24 kernel built for x86-64 under qemu via serial console, doing CPU-intensive things that also produce a lot of output (such as compiling software) tends to produce the error message in the title. Anybody have a clue why? It doesn't seem to cause an

2.6.24 says serial8250: too much work for irq4 a lot.

2008-02-05 Thread Rob Landley
When running a 2.6.24 kernel built for x86-64 under qemu via serial console, doing CPU-intensive things that also produce a lot of output (such as compiling software) tends to produce the error message in the title. Anybody have a clue why? It doesn't seem to cause an actual problem, but it's