[fedora-arm] Re: Qemu aarch64 install

2017-02-16 Thread Gerd Hoffmann
Hi, > > I suspect a big factor here is CONFIG_ARM64_64K_PAGES=y. Raspberry pi > > 3, with standard fedora kernel (64k pages), minimal install (@core), > > booted to the shell prompt. "free" reports ~122MB of memory as used. > > Same with a self-compiled kernel (4k pages), I get ~44MB of used m

[fedora-arm] Re: Qemu aarch64 install

2017-02-16 Thread Peter Robinson
>> > I suspect a big factor here is CONFIG_ARM64_64K_PAGES=y. Raspberry pi >> > 3, with standard fedora kernel (64k pages), minimal install (@core), >> > booted to the shell prompt. "free" reports ~122MB of memory as used. >> > Same with a self-compiled kernel (4k pages), I get ~44MB of used memo

[fedora-arm] Re: Qemu aarch64 install

2017-02-16 Thread Jon Masters
On 02/16/2017 04:10 AM, Gerd Hoffmann wrote: > What was the reason to go 64k pages in the first place? Several reasons: 1). Some (server) implementations have higher performance under 64K. 2). VA sizes greater than 48-bit require a 64K translation granule. I can mention that one publicly n

[fedora-arm] Re: Fedora ARM & AArch64 Status Meeting Minutes 2017-02-14

2017-02-16 Thread Jon Masters
On 02/16/2017 10:36 AM, Christopher Covington wrote: > Hi Peter, Paul, Laura, > > Feel free to drop the QDF2432 system register access erratum workaround > patch at this point. Thanks for carrying it as long as you have. It has > enabled additional testing and development that would have been muc

[fedora-arm] Re: Qemu aarch64 install

2017-02-16 Thread Gerd Hoffmann
Hi, > pressure on them to clean this up. RHEL (and Cent) will use 64K no > matter what, but there could be a (short term) case for Fedora having > a cycle or two with a smaller size - I would prefer to avoid that. I think it would be more useful to offer a 4k kernel in addition to the 64k one,

[fedora-arm] Re: Qemu aarch64 install

2017-02-16 Thread Jon Masters
On 02/16/2017 12:59 PM, Gerd Hoffmann wrote: >> pressure on them to clean this up. RHEL (and Cent) will use 64K no >> matter what, but there could be a (short term) case for Fedora having >> a cycle or two with a smaller size - I would prefer to avoid that. > > I think it would be more useful to

[fedora-arm] Re: Qemu aarch64 install

2017-02-16 Thread Marcin Juszkiewicz
W dniu 16.02.2017 o 18:59, Gerd Hoffmann pisze: > I think it would be more useful to offer a 4k kernel in addition to > the 64k one, similar to how Fedora ships kernel with and without > lpae support on armv7. Some applications still check PAGE_SIZE only during compilation instead of on runtime.