On 04/25/2018 01:57 PM, Mikulas Patocka wrote: > > > On Wed, 25 Apr 2018, Randy Dunlap wrote: > >> On 04/25/2018 01:02 PM, Mikulas Patocka wrote: >>> >>> >>> From: Mikulas Patocka <mpatocka@xxxxxxxxxx> >>> Subject: [PATCH v4] fault-injection: introduce kvmalloc fallback options >>> >>> This patch introduces a fault-injection option "kvmalloc_fallback". This >>> option makes kvmalloc randomly fall back to vmalloc. >>> >>> Unfortunatelly, some kernel code has bugs - it uses kvmalloc and then >> >> Unfortunately, > > OK - here I fixed the typos: > > > From: Mikulas Patocka <mpatocka@xxxxxxxxxx> > Subject: [PATCH] fault-injection: introduce kvmalloc fallback options > > This patch introduces a fault-injection option "kvmalloc_fallback". This > option makes kvmalloc randomly fall back to vmalloc. > > Unfortunately, some kernel code has bugs - it uses kvmalloc and then > uses DMA-API on the returned memory or frees it with kfree. Such bugs were > found in the virtio-net driver, dm-integrity or RHEL7 powerpc-specific > code. This options helps to test for these bugs. > > The patch introduces a config option FAIL_KVMALLOC_FALLBACK_PROBABILITY. > It can be enabled in distribution debug kernels, so that kvmalloc abuse > can be tested by the users. The default can be overridden with > "kvmalloc_fallback" parameter or in /sys/kernel/debug/kvmalloc_fallback/. > > Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> > > --- > Documentation/fault-injection/fault-injection.txt | 7 +++++ > include/linux/fault-inject.h | 9 +++--- > kernel/futex.c | 2 - > lib/Kconfig.debug | 15 +++++++++++ > mm/failslab.c | 2 - > mm/page_alloc.c | 2 - > mm/util.c | 30 ++++++++++++++++++++++ > 7 files changed, 60 insertions(+), 7 deletions(-) Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> # Documentation and Kconfig only thanks. -- ~Randy
