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Subject[PATCH v2 0/7] /proc/kcore improvements
Date
From: Omar Sandoval <osandov@fb.com>

Hi,

This series makes a few improvements to /proc/kcore. Patches 1 and 2 are
prep patches. Patch 3 is a fix/cleanup. Patch 4 is another prep patch.
Patches 5 and 6 are optimizations to ->read(). Patch 7 adds vmcoreinfo
to /proc/kcore (apparently I'm not the only one who wants this, see
https://www.spinics.net/lists/arm-kernel/msg665103.html).

I tested that the crash utility still works with this applied, and
readelf is happy with it, as well.

Andrew, since this didn't get any traction on the fsdevel side, and
you're already carrying James' patch, could you take this through -mm?

Thanks!

Changes from v1:

- Rebased onto v4.18-rc4 + James' patch
(https://patchwork.kernel.org/patch/10519739/) in the mm tree
- Fix spurious sparse warning (see the report and response in
https://patchwork.kernel.org/patch/10512431/)

Omar Sandoval (7):
proc/kcore: don't grab lock for kclist_add()
proc/kcore: replace kclist_lock rwlock with rwsem
proc/kcore: fix memory hotplug vs multiple opens race
proc/kcore: hold lock during read
proc/kcore: clean up ELF header generation
proc/kcore: optimize multiple page reads
proc/kcore: add vmcoreinfo note to /proc/kcore

fs/proc/Kconfig | 1 +
fs/proc/kcore.c | 536 +++++++++++++++++--------------------
include/linux/crash_core.h | 2 +
kernel/crash_core.c | 4 +-
4 files changed, 251 insertions(+), 292 deletions(-)

--
2.18.0

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