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linux-sg2042
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3 Commits

Author SHA1 Message Date
Martin Schwidefsky 13c6680acb [S390] correct vdso version string 
The glibc vdso code for s390 uses the version string 2.6.29, the
kernel uses the version string 2.6.26. No wonder the vdso code
is never used. The first kernel version to contain the vdso code
is 2.6.29 which makes this the correct version.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2010-02-26 22:37:33 +01:00
Martin Schwidefsky c742b31c03 [PATCH] fast vdso implementation for CLOCK_THREAD_CPUTIME_ID 
The extract cpu time instruction (ectg) instruction allows the user
process to get the current thread cputime without calling into the
kernel. The code that uses the instruction needs to switch to the
access registers mode to get access to the per-cpu info page that
contains the two base values that are needed to calculate the current
cputime from the CPU timer with the ectg instruction.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2008-12-31 15:11:49 +01:00
Martin Schwidefsky b020632e40 [S390] introduce vdso on s390 
Add a vdso to speed up gettimeofday and clock_getres/clock_gettime for
CLOCK_REALTIME/CLOCK_MONOTONIC.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2008-12-25 13:38:55 +01:00