Description of problem:
gluster volume set crashes glusterd.
Here is the backtrace:
#0  0x00007f8b03bca8ef in xlator_mem_acct_init (xl=0x1e51390, num_types=99) at xlator.c:466
466	        if (!xl->ctx->mem_acct_enable)
Missing separate debuginfos, use: debuginfo-install glibc-2.15-37.fc17.x86_64 keyutils-libs-1.5.5-2.fc17.x86_64 krb5-libs-1.10-5.fc17.x86_64 libcom_err-1.42-4.fc17.x86_64 libgcc-4.7.0-5.fc17.x86_64 libselinux-2.1.10-3.fc17.x86_64 libxml2-2.7.8-7.fc17.x86_64 openssl-1.0.0j-1.fc17.x86_64 zlib-1.2.5-6.fc17.x86_64
(gdb) p xl->name
$1 = 0x1e51340 "r2-posix"
(gdb) p xl->ctx
$2 = (glusterfs_ctx_t *) 0x0
(gdb) bt
#0  0x00007f8b03bca8ef in xlator_mem_acct_init (xl=0x1e51390, num_types=99) at xlator.c:466
#1  0x00007f8afefc7a82 in mem_acct_init (this=0x1e51390) at posix.c:3918
#2  0x00007f8b03c18fb2 in xlator_validate_rec (xlator=0x1e51390, op_errstr=0x7fff9bbafb68) at options.c:904
#3  0x00007f8b03c18ebb in xlator_validate_rec (xlator=0x1e4b7a0, op_errstr=0x7fff9bbafb68) at options.c:886
#4  0x00007f8b03c18ebb in xlator_validate_rec (xlator=0x1e4c140, op_errstr=0x7fff9bbafb68) at options.c:886
#5  0x00007f8b03c18ebb in xlator_validate_rec (xlator=0x1e4cae0, op_errstr=0x7fff9bbafb68) at options.c:886
#6  0x00007f8b03c18ebb in xlator_validate_rec (xlator=0x1e4d840, op_errstr=0x7fff9bbafb68) at options.c:886
#7  0x00007f8b03c18ebb in xlator_validate_rec (xlator=0x1e4e1e0, op_errstr=0x7fff9bbafb68) at options.c:886
#8  0x00007f8b03c18ebb in xlator_validate_rec (xlator=0x1e4eb80, op_errstr=0x7fff9bbafb68) at options.c:886
#9  0x00007f8b03c18ebb in xlator_validate_rec (xlator=0x1e4f520, op_errstr=0x7fff9bbafb68) at options.c:886
#10 0x00007f8b03c190cf in graph_reconf_validateopt (graph=0x7fff9bbaf068, op_errstr=0x7fff9bbafb68)
    at options.c:933
#11 0x00007f8b009ea39b in validate_brickopts (volinfo=0x1c873f0, brickinfo_path=0x1c926f0 "/gfs/r2_0", 

I did a volume set for client-log-level with the patch ed4b76ba9c545f577287c0e70ae3cc853a0d5f3f, it crashed. resetting the patch did not produce any crash, so most probably this is the cause for the regression.

Version-Release number of selected component (if applicable):


How reproducible:
always

Steps to Reproduce:
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Actual results:


Expected results:


Additional info: