16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
96 lines
2.3 KiB
Python
96 lines
2.3 KiB
Python
# mem-phys-addr.py: Resolve physical address samples
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) 2018, Intel Corporation.
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from __future__ import division
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import os
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import sys
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import struct
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import re
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import bisect
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import collections
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sys.path.append(os.environ['PERF_EXEC_PATH'] + \
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'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
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#physical address ranges for System RAM
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system_ram = []
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#physical address ranges for Persistent Memory
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pmem = []
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#file object for proc iomem
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f = None
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#Count for each type of memory
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load_mem_type_cnt = collections.Counter()
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#perf event name
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event_name = None
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def parse_iomem():
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global f
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f = open('/proc/iomem', 'r')
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for i, j in enumerate(f):
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m = re.split('-|:',j,2)
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if m[2].strip() == 'System RAM':
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system_ram.append(long(m[0], 16))
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system_ram.append(long(m[1], 16))
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if m[2].strip() == 'Persistent Memory':
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pmem.append(long(m[0], 16))
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pmem.append(long(m[1], 16))
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def print_memory_type():
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print "Event: %s" % (event_name)
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print "%-40s %10s %10s\n" % ("Memory type", "count", "percentage"),
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print "%-40s %10s %10s\n" % ("----------------------------------------", \
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"-----------", "-----------"),
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total = sum(load_mem_type_cnt.values())
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for mem_type, count in sorted(load_mem_type_cnt.most_common(), \
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key = lambda(k, v): (v, k), reverse = True):
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print "%-40s %10d %10.1f%%\n" % (mem_type, count, 100 * count / total),
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def trace_begin():
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parse_iomem()
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def trace_end():
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print_memory_type()
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f.close()
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def is_system_ram(phys_addr):
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#/proc/iomem is sorted
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position = bisect.bisect(system_ram, phys_addr)
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if position % 2 == 0:
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return False
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return True
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def is_persistent_mem(phys_addr):
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position = bisect.bisect(pmem, phys_addr)
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if position % 2 == 0:
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return False
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return True
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def find_memory_type(phys_addr):
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if phys_addr == 0:
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return "N/A"
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if is_system_ram(phys_addr):
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return "System RAM"
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if is_persistent_mem(phys_addr):
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return "Persistent Memory"
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#slow path, search all
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f.seek(0, 0)
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for j in f:
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m = re.split('-|:',j,2)
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if long(m[0], 16) <= phys_addr <= long(m[1], 16):
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return m[2]
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return "N/A"
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def process_event(param_dict):
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name = param_dict["ev_name"]
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sample = param_dict["sample"]
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phys_addr = sample["phys_addr"]
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global event_name
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if event_name == None:
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event_name = name
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load_mem_type_cnt[find_memory_type(phys_addr)] += 1
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