/* * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...) * * Tests if the control register is updated correctly * at context switches * * Warning: this test will cause a very high load for a few seconds * */ #include #include #include #include #include #include #include #include /* Get/set the process' ability to use the timestamp counter instruction */ #ifndef PR_GET_TSC #define PR_GET_TSC 25 #define PR_SET_TSC 26 # define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */ # define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */ #endif static uint64_t rdtsc(void) { uint32_t lo, hi; /* We cannot use "=A", since this would use %rax on x86_64 */ __asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi)); return (uint64_t)hi << 32 | lo; } static void sigsegv_expect(int sig) { /* */ } static void segvtask(void) { if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0) { perror("prctl"); exit(0); } signal(SIGSEGV, sigsegv_expect); alarm(10); rdtsc(); fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n"); exit(0); } static void sigsegv_fail(int sig) { fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n"); exit(0); } static void rdtsctask(void) { if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0) { perror("prctl"); exit(0); } signal(SIGSEGV, sigsegv_fail); alarm(10); for(;;) rdtsc(); } int main(void) { int n_tasks = 100, i; fprintf(stderr, "[No further output means we're allright]\n"); for (i=0; itreecommitdiff
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authorEyal Itkin <eyal.itkin@gmail.com>2017-02-07 16:43:05 +0300
committerDoug Ledford <dledford@redhat.com>2017-02-08 12:28:30 -0500
commit628f07d33c1f2e7bf31e0a4a988bb07914bd5e73 (patch)
treec228c66498f9a4562093fbbf80a41bcede0c06f2 /net/mac80211/Kconfig
parentb4cfe3971f6eab542dd7ecc398bfa1aeec889934 (diff)
IB/rxe: Fix resid update
Update the response's resid field when larger than MTU, instead of only updating the local resid variable. Fixes: 8700e3e7c485 ("Soft RoCE driver") Signed-off-by: Eyal Itkin <eyal.itkin@gmail.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'net/mac80211/Kconfig')