Kill the bkl in procfs
in [Kernel]
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From: Frederic Weisbecker on 10 Apr 2010 09:30 On Tue, Mar 30, 2010 at 08:20:09AM +0200, Frederic Weisbecker wrote: > Hi, > > This patchset drops any use of the big kernel lock from procfs. > May be there is still one or two NULL llseek somewhere but I > think we have fixed 99% of those that were in the procfs core. > > Users of procfs implementing an ioctl have not been easy to > spot automatically (there are hundreds of procfs users) > as there are many indirect ways to register a procfs, depending > on the subsystem you are. > > So for those who want to verify the reliability of this check, > you can look at the script there: > > http://tglx.de/~fweisbec/seek.py > > Beware it's very dirty! The hardcoded path are those I had > to check manually (or that I added to the automatic check). > One day I should learn how to use Coccinelle instead. > > In the worst case, the remaining ones this script or my eyes > forgot will trigger a warning. > > Thanks. I've applied the patchset to git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git bkl/procfs Thanks. > > > Arnd Bergmann (1): > procfs: Kill BKL in llseek on proc base > > Frederic Weisbecker (5): > procfs: Use generic_file_llseek in /proc/kcore > procfs: Use generic_file_llseek in /proc/kmsg > procfs: Use generic_file_llseek in /proc/vmcore > procfs: Push down the bkl from ioctl > procfs: Kill the bkl in ioctl > > drivers/char/i8k.c | 53 +++++++++++++++------ > drivers/isdn/divert/divert_procfs.c | 90 ++++++++++++++++++++++------------- > fs/proc/base.c | 10 ++++- > fs/proc/inode.c | 4 +- > fs/proc/kcore.c | 1 + > fs/proc/kmsg.c | 1 + > fs/proc/vmcore.c | 1 + > net/sunrpc/cache.c | 20 ++++++-- > 8 files changed, 123 insertions(+), 57 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |