Created attachment 279297 [details] dmesg log of crash This happens mostly during memory pressure but I am not sure how to trigger it reliably. I am attaching the full log. This is the kernel commandline >BOOT_IMAGE=../vmlinuz-linux root=UUID=57274b3a-92ab-468e-b03a-06026675c1af rw >rd.luks.name=92b4aeb2-fb97-45c1-8a60-2816efe5d57e=home resume=/dev/mapper/home >resume_offset=42772480 acpi_backlight=video zswap.enabled=1 zswap.zpool=z3fold >zswap.max_pool_percent=5 transparent_hugepage=madvise scsi_mod.use_blk_mq=1 >vga=current initrd=../intel-ucode.img,../initramfs-linux.img I found this bug https://bugzilla.kernel.org/show_bug.cgi?id=198585 to be very similar but the proposed fix has not been merged so I can't be sure if it will fix the issue I am having.
Created attachment 279341 [details] Log before kernel panic and after hard reset Arch+deepin+systemd-swap zswap_enabled=1 zswap_compressor=lzo zswap_max_pool_percent=5 zswap_zpool=z3fold zram_enabled=1 zram_size=$(($RAM_SIZE*1/10)) zram_streams=$NCPU zram_alg=lz4 zram_prio=32767
(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Fri, 02 Nov 2018 10:41:46 +0000 bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=201603 > > Bug ID: 201603 > Summary: NULL pointer dereference when using z3fold and zswap > Product: Memory Management > Version: 2.5 > Kernel Version: 4.18.16 > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: Page Allocator > Assignee: akpm@linux-foundation.org > Reporter: jagannathante@gmail.com > Regression: No > > Created attachment 279297 [details] > --> https://bugzilla.kernel.org/attachment.cgi?id=279297&action=edit > dmesg log of crash > > This happens mostly during memory pressure but I am not sure how to trigger > it > reliably. I am attaching the full log. > > This is the kernel commandline > > >BOOT_IMAGE=../vmlinuz-linux root=UUID=57274b3a-92ab-468e-b03a-06026675c1af > rw > >rd.luks.name=92b4aeb2-fb97-45c1-8a60-2816efe5d57e=home > resume=/dev/mapper/home > >resume_offset=42772480 acpi_backlight=video zswap.enabled=1 > zswap.zpool=z3fold > >zswap.max_pool_percent=5 transparent_hugepage=madvise scsi_mod.use_blk_mq=1 > >vga=current initrd=../intel-ucode.img,../initramfs-linux.img > > I found this bug https://bugzilla.kernel.org/show_bug.cgi?id=198585 to be > very > similar but the proposed fix has not been merged so I can't be sure if it > will > fix the issue I am having. > > -- > You are receiving this mail because: > You are the assignee for the bug.
Created attachment 279353 [details] attachment-22937-0.html Hi, Den tis 6 nov. 2018 kl 22:48 skrev Andrew Morton <akpm@linux-foundation.org >: > > (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). > > On Fri, 02 Nov 2018 10:41:46 +0000 bugzilla-daemon@bugzilla.kernel.org > wrote: > > > https://bugzilla.kernel.org/show_bug.cgi?id=201603 > > > > Bug ID: 201603 > > Summary: NULL pointer dereference when using z3fold and zswap > > Product: Memory Management > > Version: 2.5 > > Kernel Version: 4.18.16 > > Hardware: All > > OS: Linux > > Tree: Mainline > > Status: NEW > > Severity: high > > Priority: P1 > > Component: Page Allocator > > Assignee: akpm@linux-foundation.org > > Reporter: jagannathante@gmail.com > > Regression: No > > > > Created attachment 279297 [details] > > --> https://bugzilla.kernel.org/attachment.cgi?id=279297&action=edit > > dmesg log of crash > > Basing on what I see in dmesg, it is highly likely to get fixed by https://lkml.org/lkml/2018/11/5/726. Could you please apply/retest? Best regards, Vitaly > > This happens mostly during memory pressure but I am not sure how to > trigger it > > reliably. I am attaching the full log. > > > > This is the kernel commandline > > > > >BOOT_IMAGE=../vmlinuz-linux > root=UUID=57274b3a-92ab-468e-b03a-06026675c1af rw > > >rd.luks.name=92b4aeb2-fb97-45c1-8a60-2816efe5d57e=home > resume=/dev/mapper/home > > >resume_offset=42772480 acpi_backlight=video zswap.enabled=1 > zswap.zpool=z3fold > > >zswap.max_pool_percent=5 transparent_hugepage=madvise > scsi_mod.use_blk_mq=1 > > >vga=current initrd=../intel-ucode.img,../initramfs-linux.img > > > > I found this bug https://bugzilla.kernel.org/show_bug.cgi?id=198585 to > be very > > similar but the proposed fix has not been merged so I can't be sure if > it will > > fix the issue I am having. > > > > -- > > You are receiving this mail because: > > You are the assignee for the bug. >
Created attachment 279367 [details] attachment-27234-0.html Additional to original report I have kernel BUG at mm/zswap.c:1175 (please take a look at my log) Will test patch tomorrow On Wed, Nov 7, 2018, 1:10 AM <bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=201603 > > --- Comment #3 from Vitaly (vitalywool@gmail.com) --- > Hi, > Den tis 6 nov. 2018 kl 22:48 skrev Andrew Morton < > akpm@linux-foundation.org > >: > > > > > (switched to email. Please respond via emailed reply-to-all, not via the > > bugzilla web interface). > > > > On Fri, 02 Nov 2018 10:41:46 +0000 bugzilla-daemon@bugzilla.kernel.org > > wrote: > > > > > https://bugzilla.kernel.org/show_bug.cgi?id=201603 > > > > > > Bug ID: 201603 > > > Summary: NULL pointer dereference when using z3fold and > zswap > > > Product: Memory Management > > > Version: 2.5 > > > Kernel Version: 4.18.16 > > > Hardware: All > > > OS: Linux > > > Tree: Mainline > > > Status: NEW > > > Severity: high > > > Priority: P1 > > > Component: Page Allocator > > > Assignee: akpm@linux-foundation.org > > > Reporter: jagannathante@gmail.com > > > Regression: No > > > > > > Created attachment 279297 [details] > > > --> https://bugzilla.kernel.org/attachment.cgi?id=279297&action=edit > > > dmesg log of crash > > > > > Basing on what I see in dmesg, it is highly likely to get fixed by > https://lkml.org/lkml/2018/11/5/726. Could you please apply/retest? > > Best regards, > Vitaly > > > > This happens mostly during memory pressure but I am not sure how to > > trigger it > > > reliably. I am attaching the full log. > > > > > > This is the kernel commandline > > > > > > >BOOT_IMAGE=../vmlinuz-linux > > root=UUID=57274b3a-92ab-468e-b03a-06026675c1af rw > > > >rd.luks.name=92b4aeb2-fb97-45c1-8a60-2816efe5d57e=home > > resume=/dev/mapper/home > > > >resume_offset=42772480 acpi_backlight=video zswap.enabled=1 > > zswap.zpool=z3fold > > > >zswap.max_pool_percent=5 transparent_hugepage=madvise > > scsi_mod.use_blk_mq=1 > > > >vga=current initrd=../intel-ucode.img,../initramfs-linux.img > > > > > > I found this bug https://bugzilla.kernel.org/show_bug.cgi?id=198585 to > > be very > > > similar but the proposed fix has not been merged so I can't be sure if > > it will > > > fix the issue I am having. > > > > > > -- > > > You are receiving this mail because: > > > You are the assignee for the bug. > > > > -- > You are receiving this mail because: > You are on the CC list for the bug.
Any update on this and does anyone know if this is a regression?
This seems related from Chrome OS: https://bugs.chromium.org/p/chromium/issues/detail?id=822360 I'm afraid that I don't currently have the resources to test the patches (that haven't been committed upstream) at the moment, although I may need to in the end as one of my servers is crashing every day.
Wait a second, you are sitting on a discontinued kernel. The fix has gone in back in December. Upgrade to longterm series, it's there since 4.19.6, and retest. Otherwise I do suggest that we close this issue.
I am going to enable zswap and z3fold to confirm the fix. Sorry, I didn't follow through after it was merged.
I'm installing it too. I didn't know there was a fix in-place anywhere so this is good news! It'll take me a few days of testing to get a result.
I can confirm there have been no crashes since I switched, so closing. Thanks for the help and fix :)