Re: "Too many levels of symbolic links"

[Donald Buczek <buczek@molgen.mpg.de>]

Hello,

I've taken your idea "Apart from a really odd compiler optimization or 
bug" and compiled with gcc 4.8.2 (instead of 4.7.3)

Also I've put some additional DPRINTKs into the routines setting or 
clearing DCACHE_MOUNTED

So lets wait for the next event .....

Regards
   Donald



On 02/21/14 02:42, Ian Kent wrote:
> On Thu, 2014-02-20 at 16:57 +0100, Donald Buczek wrote:
>> On 02/20/14 13:18, Ian Kent wrote:
>>> On Thu, 2014-02-20 at 19:41 +0800, Ian Kent wrote:
>>>>> 1969 (gdb) print *(struct dentry *) 0xffff88007fd06c50
>>>>> 1970 $3 = {d_flags = 1523840, d_seq = {sequence = 4}, d_hash = {next = 0xffff880214025c98, pprev = 0xffffc9000013d570}, d_parent = 0xffff8800caa66810, d_name = {{{hash = 1876415966, len = 7}, hash_len = 31941187038}, name = 0xffff88007fd06c88 "gbrowse"}, d_inode = 0xffff8800961ad250, d_iname = "gbrowse", '\000' <repeats 24 times>, d_lockref = {{lock_count = 8610971969, {
>>>>> 1971         lock = {{rlock = {raw_lock = {{head_tail = 21037377, tickets = {head = 321, tail = 321}}}}}}, count = 2}}}, d_op = 0xffffffff81c45b40, d_sb = 0xffff880222a33800, d_time = 0, d_fsdata = 0xffff8800ca443b80, d_lru = {next = 0xffff88007fd06cd0, prev = 0xffff88007fd06cd0}, d_u = {d_child = {next = 0xffff88007fc9f420, prev = 0xffff8800caa668b0}, d_rcu = {
>>>>> 1972       next = 0xffff88007fc9f420, func = 0xffff8800caa668b0}}, d_subdirs = {next = 0xffff88007fd06cf0, prev = 0xffff88007fd06cf0}, d_alias = {next = 0x0, pprev = 0xffff8800961ad360}}
>>> I wonder if there's a struct mount for which this dentry is
>>> mnt_mountpoint and if so what the value of m_count is for the struct
>>> mountpoint of the struct mount?
>> No there isn't. Already checked in
>> http://owww.molgen.mpg.de/~buczek/autofs-demo/typescript.l lines 1795ff
> Oh right, I forgot about that, must have been the seemingly endless list
> of dentrys above it, ;)
>
> LOL, and if there was a mount that's unlinked we'd never find it, but
> yes, a ref counting problem would most likely leave it on the list.
>
>> Regards
>>     Donald
>>
>


-- 
Donald Buczek
buczek@molgen.mpg.de
Tel: +49 30 8413 1433