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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [userptr] WARN(__delete_from_page_cache)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93910">93910</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[userptr] WARN(__delete_from_page_cache)
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Looks like if we dirty the pages from inside an the invalidate-range we may
trigger:
[ 5686.374234] ------------[ cut here ]------------
[ 5686.374255] WARNING: CPU: 0 PID: 13274 at mm/filemap.c:217
__delete_from_page_cache+0x274/0x280()
[ 5686.374259] Modules linked in: drbg ansi_cprng ctr ccm arc4 iwldvm mac80211
snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic snd_hda_intel
snd_hda_codec snd_hda_core intel_powerclamp snd_hwdep coretemp iwlwifi snd_pcm
dm_multipath thinkpad_acpi kvm cfg80211 snd_seq_midi nvram snd_seq_midi_event
irqbypass rfcomm snd_rawmidi crct10dif_pclmul crc32_pclmul btusb snd_seq
aesni_intel btrtl aes_x86_64 btbcm bnep lrw btintel bluetooth gf128mul
glue_helper intel_ips ablk_helper cryptd joydev snd_seq_device serio_raw
snd_timer snd lpc_ich mei_me shpchp wmi mei soundcore mac_hid parport_pc
binfmt_misc ppdev lp parport dm_mirror dm_region_hash dm_log e1000e psmouse
ahci ptp libahci pps_core
[ 5686.374345] CPU: 0 PID: 13274 Comm: gem_concurrent_ Not tainted 4.4.0+ #36
[ 5686.374348] Hardware name: LENOVO 514328U/514328U, BIOS 6QET44WW (1.14 )
04/20/2010
[ 5686.374351] ffffffff81d008ee ffff8800ab763b00 ffffffff813970cd
0000000000000000
[ 5686.374355] ffff8800ab763b38 ffffffff810762c6 ffff8800aae053b8
ffffea00009b6340
[ 5686.374360] ffff8800aae053b0 0000000000000000 0000000000000003
ffff8800ab763b48
[ 5686.374364] Call Trace:
[ 5686.374376] [<ffffffff813970cd>] dump_stack+0x44/0x57
[ 5686.374381] [<ffffffff810762c6>] warn_slowpath_common+0x86/0xc0
[ 5686.374385] [<ffffffff810763ba>] warn_slowpath_null+0x1a/0x20
[ 5686.374389] [<ffffffff811723d4>] __delete_from_page_cache+0x274/0x280
[ 5686.374393] [<ffffffff8117242d>] delete_from_page_cache+0x4d/0x80
[ 5686.374399] [<ffffffff81180976>] truncate_inode_page+0x56/0x90
[ 5686.374406] [<ffffffff8118b249>] shmem_undo_range+0x399/0x690
[ 5686.374412] [<ffffffff8118b554>] shmem_truncate_range+0x14/0x40
[ 5686.374417] [<ffffffff8118b630>] shmem_evict_inode+0xb0/0x130
[ 5686.374422] [<ffffffff81203cee>] evict+0xbe/0x1a0
[ 5686.374426] [<ffffffff81204985>] iput+0x175/0x1e0
[ 5686.374432] [<ffffffff8120034c>] __dentry_kill+0x17c/0x1e0
[ 5686.374436] [<ffffffff81200549>] dput+0x199/0x1f0
[ 5686.374441] [<ffffffff811ebb58>] __fput+0x188/0x210
[ 5686.374445] [<ffffffff811ebc1e>] ____fput+0xe/0x10
[ 5686.374452] [<ffffffff81092407>] task_work_run+0x77/0x90
[ 5686.374458] [<ffffffff81071427>] exit_to_usermode_loop+0x73/0xa2
[ 5686.374466] [<ffffffff81003a7d>] syscall_return_slowpath+0x8d/0xa0
[ 5686.374472] [<ffffffff8186c758>] int_ret_from_sys_call+0x25/0x8f
[ 5686.374476] ---[ end trace 329c2060913a2504 ]---</pre>
</div>
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