I‘m trying to write a simple fs in user space,if memcpy is slower than
kernel , i think it's unfair,as for only cpu for my task,
it's a bit of arbitrary ，i just want my task not interrupted during a
specific time is that possible ?
2018-07-12 22:53 GMT+08:00 Greg KH :
> A:
Tried everything in here:How do I install kernel header files?
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How do I install kernel header files?
i want to write a device driver but not able to find the header file can
someone please help me find them?Also i...
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nothing worked.
On
By the way, when I havemmap(NULL, MAPSIZE, PROT_WRITE_|PROT_READ,
MAP_HUGETLB|MAP_PRIVATE, fd, 0):where MAPSIZE= 2GB,it fails witherror = 22,
invalid argument, without MAP_HUGETLB, it was ok.
On Thursday, July 12, 2018, 4:44:35 PM EDT,
wrote:
On Thu, 12 Jul 2018 20:33:32 -,
On Thu, 12 Jul 2018 20:33:32 -, David Frank said:
> I got it from hereHow To Install Kernel 4.15 RC7 on Ubuntu, Linux Mint,
> Elementary OS And Other Ubuntu Derivatives | LinuxG.net
Looks like you got the linux-image-... .deb but didn't do the linux-headers-...
.deb(s).
(And I have no
I got it from hereHow To Install Kernel 4.15 RC7 on Ubuntu, Linux Mint,
Elementary OS And Other Ubuntu Derivatives | LinuxG.net
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How To Install Kernel 4.15 RC7 on Ubuntu, Linux Mint, Elementary OS And ...
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no headers
On Thursday, July 12, 2018, 4:22:33 PM EDT,
On Thu, 12 Jul 2018 20:10:36 -, David Frank said:
> Thanks Valdis.Looks like the failure is that I can not write to a 2GB buffer
> (char bf[2GB size]).Where do I get the distro include file?
>From the same exact place you got the distro kernel from. (I'm guessing
it's a distro kernel from
Thanks Valdis.Looks like the failure is that I can not write to a 2GB buffer
(char bf[2GB size]).Where do I get the distro include file?
On Thursday, July 12, 2018, 2:58:49 PM EDT, valdis.kletni...@vt.edu
wrote:
On Thu, 12 Jul 2018 18:44:43 -, David Frank said:
> Hi,How do I
On Thu, 12 Jul 2018 18:44:43 -, David Frank said:
> Hi,How do I enable the MAP_SYNC flag in mmap for linux 4.15, my code does not
> compile with that flag on linux 4.15.0-041500rc7-generic #201801072330
Get your distro to ship an update to /usr/include/linux (kernel-headers) that
contains
Hi,How do I enable the MAP_SYNC flag in mmap for linux 4.15, my code does not
compile with that flag on linux 4.15.0-041500rc7-generic #201801072330
Also, how do I make mmap support map size of 2GB or larger, currently the call
to mmap fails with mapsize of 2GB.
thanks,
David
On Thu, 12 Jul 2018 22:27:37 +0800, bing zhu said:
> as for memcpy ,kernel is faster than user ,might because schedule ,can i
> try to make user as fast as kernel ?
Do you have an actual issue where the difference in speed of these two
things makes a difference? Or is this primarily a mental
A: http://en.wikipedia.org/wiki/Top_post
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A: Because it messes up the order in which people normally read text.
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A: No.
Q: Should I
as for memcpy ,kernel is faster than user ,might because schedule ,can i
try to make user as fast as kernel ?
2018-07-12 13:34 GMT+08:00 Greg KH :
> On Thu, Jul 12, 2018 at 12:47:12PM +0800, bing zhu wrote:
> > agree! a simple rename would survice.results are the same .kernel is
> faster
> >
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