I don't know much about mono but wonder if signal handling problems (in mono) could be related "EINTR" is suspicious on read ... Don't know if this is related but google search turned up this: "Mono uses signals on certain platforms to handle NullReferenceExceptions. It’s also becoming more and more common to add third-party libraries that detect and report crashes. The problem is when those third-party libraries install their own signal handlers, overwriting Mono’s signal handlers. When this happens, any NullReferenceException would be detected by such libraries as a fatal SIGSEGV, and the libraries would report it as a crash and terminate the process." On Fri, May 1, 2020 at 12:19 AM Scott M. Lewandowski <vgerkernel@xxxxxxxxxx> wrote: > > > EINTR on read ... Hundreds of times?! I have seen scp do that by sending signals but in writes not reads > > Not using scp at the moment. > > > Could an app be sending signals trying to kill the process doing the reads? > > Not that I'm aware of. I'm not sure exactly how I'd check that, but I will look into it. > > One other thing that came to mind that may be helpful is that one of the processes doing the most IO is running under mono 6.8.0.105 > > -scott > > > > > From: Steve French <smfrench@xxxxxxxxx> > Sent: Friday, May 1, 2020 12:07 AM > To: Scott M. Lewandowski <vgerkernel@xxxxxxxxxx> > Cc: CIFS <linux-cifs@xxxxxxxxxxxxxxx> > Subject: Re: issues with CIFS on Ubuntu 20 mounting Windows 2019 > > EINTR on read ... Hundreds of times?! I have seen scp do that by sending signals but in writes not reads > > On Thu, Apr 30, 2020, 23:48 Scott M. Lewandowski <mailto:vgerkernel@xxxxxxxxxx> wrote: > I have an Ubuntu 20.04 box mounting shares from a Windows 2019 server. Both boxes are fully patched. They are resident on the same hypervisor and communicating directly via a vSwitch. I have 4 shares mounted; here is an example from my fstab (yes, I know I should move the credential file): > > //file1/usenet /mnt/usenet cifs vers=3.0,uid=scott,credentials=/home/scott/.smbcredentials,noserverino,nounix,iocharset=utf8 0 0 > > My kernel is 5.4.0-28-generic and mount.cifs version is 6.9. The contents of DebugData are included below. > > Right after the mount, I see a duplicate cookie reported. It is unclear if this is a problem or not. Following that, I periodically see messages similar to the following repeated in dmesg: > > [ 179.625296] SMB2_read: 9 callbacks suppressed > [ 179.625298] CIFS VFS: Send error in read = -4 > [ 179.704191] CIFS VFS: Send error in read = -4 > [ 179.847514] CIFS VFS: Send error in read = -4 > [ 180.031516] CIFS VFS: Send error in read = -4 > [ 180.214848] CIFS VFS: Send error in read = -4 > [ 180.282909] CIFS VFS: Send error in read = -4 > [ 180.474829] CIFS VFS: Send error in read = -4 > [ 180.621349] CIFS VFS: Send error in read = -4 > [ 180.780465] CIFS VFS: Send error in read = -4 > [ 180.823249] CIFS VFS: Send error in read = -4 > [ 182.339351] CIFS VFS: Close unmatched open > [ 182.726829] CIFS VFS: Close unmatched open > [ 184.292663] CIFS VFS: Close unmatched open > [ 184.501185] CIFS VFS: Close unmatched open > [ 191.784922] SMB2_read: 4 callbacks suppressed > [ 191.784925] CIFS VFS: Send error in read = -4 > [ 191.884186] CIFS VFS: Send error in read = -4 > [ 192.270851] CIFS VFS: Send error in read = -4 > [ 192.323467] CIFS VFS: Send error in read = -4 > [ 192.381336] CIFS VFS: Send error in read = -4 > [ 192.446711] CIFS VFS: Send error in read = -4 > [ 192.507605] CIFS VFS: Send error in read = -4 > [ 193.244397] CIFS VFS: Send error in read = -4 > [ 193.307588] CIFS VFS: Send error in read = -4 > [ 193.403410] CIFS VFS: Send error in read = -4 > [ 193.797038] CIFS VFS: Close unmatched open > [ 196.784082] CIFS VFS: Close unmatched open > [ 198.247594] CIFS VFS: Close unmatched open > > Here is the duplicate cookie info: > > [ 21.713307] FS-Cache: Duplicate cookie detected > [ 21.713840] FS-Cache: O-cookie c=00000000e8276279 [p=0000000079ef0365 fl=222 nc=0 na=1] > [ 21.714330] FS-Cache: O-cookie d=00000000173ea0ee n=00000000243f210c > [ 21.714779] FS-Cache: O-key=[8] '020001bdc0a801af' > [ 21.715219] FS-Cache: N-cookie c=00000000afb49d9c [p=0000000079ef0365 fl=2 nc=0 na=1] > [ 21.715672] FS-Cache: N-cookie d=00000000173ea0ee n=00000000dd1465c5 > [ 21.716141] FS-Cache: N-key=[8] '020001bdc0a801af' > [ 21.716591] FS-Cache: Duplicate cookie detected > [ 21.717217] FS-Cache: O-cookie c=00000000e8276279 [p=0000000079ef0365 fl=222 nc=0 na=1] > [ 21.717679] FS-Cache: O-cookie d=00000000173ea0ee n=00000000243f210c > [ 21.718220] FS-Cache: O-key=[8] '020001bdc0a801af' > [ 21.718681] FS-Cache: N-cookie c=0000000063665cf7 [p=0000000079ef0365 fl=2 nc=0 na=1] > [ 21.719166] FS-Cache: N-cookie d=00000000173ea0ee n=00000000e757f917 > [ 21.719621] FS-Cache: N-key=[8] '020001bdc0a801af' > [ 21.720097] FS-Cache: Duplicate cookie detected > [ 21.720565] FS-Cache: O-cookie c=00000000e8276279 [p=0000000079ef0365 fl=222 nc=0 na=1] > [ 21.721053] FS-Cache: O-cookie d=00000000173ea0ee n=00000000243f210c > [ 21.721518] FS-Cache: O-key=[8] '020001bdc0a801af' > [ 21.721994] FS-Cache: N-cookie c=00000000d479c294 [p=0000000079ef0365 fl=2 nc=0 na=1] > [ 21.722476] FS-Cache: N-cookie d=00000000173ea0ee n=00000000ca1891fa > [ 21.722941] FS-Cache: N-key=[8] '020001bdc0a801af' > > Any ideas what could be going on? > > Thanks for any help! > > > > > > > DebugData: > CIFS Version 2.23 > Features: DFS,FSCACHE,STATS,DEBUG,ALLOW_INSECURE_LEGACY,WEAK_PW_HASH,CIFS_POSIX,UPCALL(SPNEGO),XATTR,ACL > CIFSMaxBufSize: 16384 > Active VFS Requests: 0 > Servers: > Number of credits: 8190 Dialect 0x300 > 1) Name: 192.168.1.175 Uses: 1 Capability: 0x300067 Session Status: 1 TCP status: 1 Instance: 1 > Local Users To Server: 1 SecMode: 0x1 Req On Wire: 0 SessionId: 0x100080000021 > Shares: > 0) IPC: \\file1\IPC$ Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 > Share Capabilities: None Share Flags: 0x30 > tid: 0x1 Maximal Access: 0x11f01ff > > 1) \\file1\XXX Mounts: 1 DevInfo: 0x20020 Attributes: 0x8500df > PathComponentMax: 255 Status: 1 type: DISK Serial Number: 0xa3c339a0 > Share Capabilities: None Aligned, Partition Aligned, Share Flags: 0x0 > tid: 0x5 Optimal sector size: 0x200 Maximal Access: 0x1f01ff > > MIDs: > > Server interfaces: 2 > 0) Speed: 10000000000 bps > Capabilities: > IPv6: fe80:0000:0000:0000:71cb:1839:1069:9806 > 1) Speed: 10000000000 bps > Capabilities: > IPv4: 192.168.1.175 > Number of credits: 8190 Dialect 0x300 > > 2) Name: 192.168.1.175 Uses: 1 Capability: 0x300067 Session Status: 1 TCP status: 1 Instance: 1 > Local Users To Server: 1 SecMode: 0x1 Req On Wire: 0 SessionId: 0x10006c000019 > Shares: > 0) IPC: \\file1\IPC$ Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 > Share Capabilities: None Share Flags: 0x30 > tid: 0x1 Maximal Access: 0x11f01ff > > 1) \\file1\usenet Mounts: 1 DevInfo: 0x20020 Attributes: 0x8500df > PathComponentMax: 255 Status: 1 type: DISK Serial Number: 0xa3c339a0 > Share Capabilities: None Aligned, Partition Aligned, Share Flags: 0x0 > tid: 0x5 Optimal sector size: 0x200 Maximal Access: 0x1f01ff > > MIDs: > > Server interfaces: 2 > 0) Speed: 10000000000 bps > Capabilities: > IPv6: fe80:0000:0000:0000:71cb:1839:1069:9806 > 1) Speed: 10000000000 bps > Capabilities: > IPv4: 192.168.1.175 > > > 3) Name: 192.168.1.175 Uses: 1 Capability: 0x300067 Session Status: 1 TCP status: 1 Instance: 1 > Local Users To Server: 1 SecMode: 0x1 Req On Wire: 2 SessionId: 0x10007c000061 > Shares: > 0) IPC: \\file1\IPC$ Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 > Share Capabilities: None Share Flags: 0x30 > tid: 0x1 Maximal Access: 0x11f01ff > > 1) \\file1\YYY Mounts: 1 DevInfo: 0x20020 Attributes: 0x8500df > PathComponentMax: 255 Status: 1 type: DISK Serial Number: 0xa3c339a0 > Share Capabilities: None Aligned, Partition Aligned, Share Flags: 0x0 > tid: 0x5 Optimal sector size: 0x200 Maximal Access: 0x1f01ff > > MIDs: > State: 2 com: 8 pid: 1218 cbdata: 00000000e45c59d2 mid 1211489 > State: 2 com: 8 pid: 1218 cbdata: 0000000018476195 mid 1211553 > > Server interfaces: 2 > 0) Speed: 10000000000 bps > Capabilities: > IPv6: fe80:0000:0000:0000:71cb:1839:1069:9806 > 1) Speed: 10000000000 bps > Capabilities: > IPv4: 192.168.1.175 > > Number of credits: 8190 Dialect 0x300 > 4) Name: 192.168.1.175 Uses: 1 Capability: 0x300067 Session Status: 1 TCP status: 1 Instance: 1 > Local Users To Server: 1 SecMode: 0x1 Req On Wire: 0 SessionId: 0x10006c000055 > Shares: > 0) IPC: \\file1\IPC$ Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 > Share Capabilities: None Share Flags: 0x30 > tid: 0x1 Maximal Access: 0x11f01ff > > 1) \\file1\ZZZ Mounts: 1 DevInfo: 0x20020 Attributes: 0x8500df > PathComponentMax: 255 Status: 1 type: DISK Serial Number: 0xa3c339a0 > Share Capabilities: None Aligned, Partition Aligned, Share Flags: 0x0 > tid: 0x5 Optimal sector size: 0x200 Maximal Access: 0x1f01ff > > MIDs: > > Server interfaces: 2 > 0) Speed: 10000000000 bps > Capabilities: > IPv6: fe80:0000:0000:0000:71cb:1839:1069:9806 > 1) Speed: 10000000000 bps > Capabilities: > IPv4: 192.168.1.175 -- Thanks, Steve
