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Groups > linux.kernel > #1287508
| From | Michal Hocko <mhocko@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: m(un)map kmalloc buffers to userspace |
| Date | 2015-12-09 15:00 +0100 |
| Message-ID | <qDNrI-EN-5@gated-at.bofh.it> (permalink) |
| References | <qDup3-5jp-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue 08-12-15 18:25:31, Sebastian Frias wrote: > Hi, > > We are porting a driver from Linux 3.4.39+ to 4.1.13+, CPU is Cortex-A9. > > The driver maps kmalloc'ed memory to user space. This sounds like a terrible idea to me. Why don't you simply use the page allocator directly? Try to imagine what would happen if you mmaped a kmalloc with a size which is not page aligned? mmaped memory uses whole page granularity. -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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m(un)map kmalloc buffers to userspace Sebastian Frias <sebastian_frias@sigmadesigns.com> - 2015-12-08 18:40 +0100
Re: m(un)map kmalloc buffers to userspace Michal Hocko <mhocko@kernel.org> - 2015-12-09 15:00 +0100
Re: m(un)map kmalloc buffers to userspace Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2015-12-09 15:10 +0100
Re: m(un)map kmalloc buffers to userspace Michal Hocko <mhocko@kernel.org> - 2015-12-09 15:40 +0100
Re: m(un)map kmalloc buffers to userspace Sebastian Frias <sebastian_frias@sigmadesigns.com> - 2015-12-09 16:00 +0100
Re: m(un)map kmalloc buffers to userspace Michal Hocko <mhocko@kernel.org> - 2015-12-09 16:20 +0100
Re: m(un)map kmalloc buffers to userspace Sebastian Frias <sebastian_frias@sigmadesigns.com> - 2015-12-09 16:40 +0100
Re: m(un)map kmalloc buffers to userspace Michal Hocko <mhocko@kernel.org> - 2015-12-10 12:50 +0100
Re: m(un)map kmalloc buffers to userspace Richard Weinberger <richard.weinberger@gmail.com> - 2015-12-10 13:10 +0100
Re: m(un)map kmalloc buffers to userspace Sebastian Frias <sebastian_frias@sigmadesigns.com> - 2015-12-10 14:40 +0100
Re: m(un)map kmalloc buffers to userspace Michal Hocko <mhocko@kernel.org> - 2015-12-10 15:10 +0100
Re: m(un)map kmalloc buffers to userspace Sebastian Frias <sebastian_frias@sigmadesigns.com> - 2015-12-10 17:50 +0100
Re: m(un)map kmalloc buffers to userspace Michal Hocko <mhocko@kernel.org> - 2015-12-11 10:50 +0100
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