Mount of VxFS filesystem on AIX fails with out of memory error
Article ID: 100028824
Updated On:
Description
Error Message
Example mount failure:
#/opt/VRTS/bin/mount -V vxfs -o cluster /dev/vx/dsk/testdg/testvol1 /testvol1
UX:vxfs mount: ERROR: V-3-20: There is not enough memory available now.
UX:vxfs mount: ERROR: V-3-21256: cannot mount /dev/vx/dsk/testdg/testvol1
56688880: 75629007: 0.2183: vmount(0x300FB388, 0x000008B4) Err#12 ENOMEM
Cause
VxFS mount can fail with ENOMEM (out of memory) in the presence of other THRPGIO file systems such as Oracle's ACFS.
Use kdb to find whether there are any THRPGIO file systems other than VxFS in use.
First, find all THRPGIO pdt's.
echo "pdt *" | kdb_64 /dev/pmem /unix | grep THRPGIO
Then for each of these, use the dev_t address in conjunction with the "lke -s" command to see which module uses this pdt.
if it shows /usr/lib/drivers/oracleacfs.ext module, then this particular THRPGIO pdt belongs to oracle ACFS.
For example, this particular pdt belongs to ACFS:
(0)> pdt * | grep THRPGIO
vmmary_pdt+007C08 0093 FFFFFFFF F1000000C0906178 00000000 00000000
00000000 local client(THRPGIO)
(0)> pdt 93 PDT address F1000F0009507C08 entry 0093 of 1FFF, type: LOCAL CLIENT -- THRPGIO eye catch (_eyec) : 706474564D4D0093 next pdt on i/o list (nextio) : FFFFFFFF dev_t or strategy ptr (device) : F1000000C0906178 last frame w/pend I/O (iotail) : FFFFFFFFFFFFFFFF free buf_struct list (bufstr) : F1000A060BB10000 total buf structs (nbufs) : 00C8 available (PAGING) (avail) : 0001 disk map srval (dmsrval) : 00000000 i/o's not finished (iocnt) : 00000000 old i/o's unfinished (oldio) : 00000000 device wait list (devwait) : 0000000000000000 buffer wait list (bufwait) : 0000000000000000 logical volume lock (lock) :@F1000F0009507C68 00000000 buffer list lock (buf_lock) :@F1000F0009507C70 00000000 flag bits (devflags) : E0000000 nextfree (nextfree) : 00000000 max phys Xlation ent (maxphys) : 00000020 pageout down limit (minpout) : FFFFFFFF pageout up limit (maxpout) : FFFFFFFF base buf structs (base_nbufs) : 00C8 free buf structs (free_nbufs) : 00C8 refundable pile (pile) : 0000000000000000 last_io_done (last_io_done) : 0000000000000000 buf chain ptr (bplist): 0000000000000000 next pdt on iolist (nextiostart): FFFFFFFF thrpginfox ptr(thrpginfopx) : F1000A0400581380RAS block (pdt_rasb) : F1000A040058D300
(0)> lke -s F1000000C0906178
ADDRESS FILE FILESIZE FLAGS MODULE NAME
.
15
1 F1000000A05FA900 F1000000C0781000 0018A000 00090242
/usr/lib/drivers/oracleacfs.ext
le_flags....... TEXT DATA DATAEXISTS NOTKEYSAFE 64
Resolution
AIX APAR IV39497 has been created to rectifiy this issue. Please contact IBM support to obtain this fix.
Issue/Introduction
