Full test result: $ git bisect start v6.6 v6.5 Bisecting: 7882 revisions left to test after this (roughly 13 steps) [a1c19328a160c80251868dbd80066dce23d07995] Merge tag 'soc-arm-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc -- $ git bisect good Bisecting: 3935 revisions left to test after this (roughly 12 steps) [e4f1b8202fb59c56a3de7642d50326923670513f] Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost -- $ git bisect bad Bisecting: 2014 revisions left to test after this (roughly 11 steps) [e0152e7481c6c63764d6ea8ee41af5cf9dfac5e9] Merge tag 'riscv-for-linus-6.6-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux -- $ git bisect bad Bisecting: 975 revisions left to test after this (roughly 10 steps) [4a3b1007eeb26b2bb7ae4d734cc8577463325165] Merge tag 'pinctrl-v6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl -- $ git bisect good Bisecting: 476 revisions left to test after this (roughly 9 steps) [4debf77169ee459c46ec70e13dc503bc25efd7d2] Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd -- $ git bisect good Bisecting: 237 revisions left to test after this (roughly 8 steps) [e7e9423db459423d3dcb367217553ad9ededadc9] Merge tag 'v6.6-vfs.super.fixes.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs -- $ git bisect good Bisecting: 141 revisions left to test after this (roughly 7 steps) [8ae5d298ef2005da5454fc1680f983e85d3e1622] Merge tag '6.6-rc-ksmbd-fixes-part1' of git://git.samba.org/ksmbd -- $ git bisect good Bisecting: 61 revisions left to test after this (roughly 6 steps) [99d99825fc075fd24b60cc9cf0fb1e20b9c16b0f] Merge tag 'nfs-for-6.6-1' of git://git.linux-nfs.org/projects/anna/linux-nfs -- $ git bisect bad Bisecting: 39 revisions left to test after this (roughly 5 steps) [7b719e2bf342a59e88b2b6215b98ca4cf824bc58] SUNRPC: change svc_recv() to return void. -- $ git bisect bad Bisecting: 19 revisions left to test after this (roughly 4 steps) [e7421ce71437ec8e4d69cc6bdf35b6853adc5050] NFSD: Rename struct svc_cacherep -- $ git bisect good Bisecting: 9 revisions left to test after this (roughly 3 steps) [baabf59c24145612e4a975f459a5024389f13f5d] SUNRPC: Convert svc_udp_sendto() to use the per-socket bio_vec array -- $ git bisect bad Bisecting: 4 revisions left to test after this (roughly 2 steps) [be2be5f7f4436442d8f6bffbb97a6f438df2896b] lockd: nlm_blocked list race fixes -- $ git bisect good Bisecting: 2 revisions left to test after this (roughly 1 step) [d424797032c6e24b44037e6c7a2d32fd958300f0] nfsd: inherit required unset default acls from effective set -- $ git bisect good Bisecting: 0 revisions left to test after this (roughly 1 step) [e18e157bb5c8c1cd8a9ba25acfdcf4f3035836f4] SUNRPC: Send RPC message on TCP with a single sock_sendmsg() call -- $ git bisect bad Bisecting: 0 revisions left to test after this (roughly 0 steps) [2eb2b93581813b74c7174961126f6ec38eadb5a7] SUNRPC: Convert svc_tcp_sendmsg to use bio_vecs directly -- $ git bisect good e18e157bb5c8c1cd8a9ba25acfdcf4f3035836f4 is the first bad commit commit e18e157bb5c8c1cd8a9ba25acfdcf4f3035836f4 I found the memory loss inside /proc/meminfo only on MemAvailable MemTotal: 346948 kB On a bad test run in looks like this: -MemAvailable: 210820 kB +MemAvailable: 26608 kB On a good test run it looks like this: -MemAvailable: 215872 kB +MemAvailable: 221128 kB > Gesendet: Freitag, den 29.03.2024 um 01:25 Uhr > Von: "Chuck Lever III" <chuck.lever@xxxxxxxxxx> > An: "Jan Schunk" <scpcom@xxxxxx>, "Benjamin Coddington" <bcodding@xxxxxxxxxx> > Cc: "Jeff Layton" <jlayton@xxxxxxxxxx>, "Neil Brown" <neilb@xxxxxxx>, "Olga Kornievskaia" <kolga@xxxxxxxxxx>, "Dai Ngo" <dai.ngo@xxxxxxxxxx>, "Tom Talpey" <tom@xxxxxxxxxx>, "Linux NFS Mailing List" <linux-nfs@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx> > Betreff: Re: [External] : nfsd: memory leak when client does many file operations > > > > > On Mar 28, 2024, at 6:03 PM, Jan Schunk <scpcom@xxxxxx> wrote: > > > > Inside the VM I was not able to reproduce the issue on v6.5.x so I keep concentrating on v6.6.x. > > > > Current status: > > > > $ git bisect start v6.6 v6.5 > > Bisecting: 7882 revisions left to test after this (roughly 13 steps) > > [a1c19328a160c80251868dbd80066dce23d07995] Merge tag 'soc-arm-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc > > > > -- > > $ git bisect good > > Bisecting: 3935 revisions left to test after this (roughly 12 steps) > > [e4f1b8202fb59c56a3de7642d50326923670513f] Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost > > > > -- > > $ git bisect bad > > Bisecting: 2014 revisions left to test after this (roughly 11 steps) > > [e0152e7481c6c63764d6ea8ee41af5cf9dfac5e9] Merge tag 'riscv-for-linus-6.6-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux > > > > -- > > $ git bisect bad > > Bisecting: 975 revisions left to test after this (roughly 10 steps) > > [4a3b1007eeb26b2bb7ae4d734cc8577463325165] Merge tag 'pinctrl-v6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl > > > > -- > > $ git bisect good > > Bisecting: 476 revisions left to test after this (roughly 9 steps) > > [4debf77169ee459c46ec70e13dc503bc25efd7d2] Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd > > > > -- > > $ git bisect good > > Bisecting: 237 revisions left to test after this (roughly 8 steps) > > [e7e9423db459423d3dcb367217553ad9ededadc9] Merge tag 'v6.6-vfs.super.fixes.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs > > Good, keep going. > > I've tried replicating the free memory loss here, using the > git regression suite on my nfsd-fixes branch. Taking a > meminfo sample between each of four test runs, the only > clear downward trend I see is: > > free:3019839 < start > free:2858438 < after first run > free:2836058 < after second run > free:2822077 < after third run > free:2797143 < after fourth run > > All other metrics seem to vary arbitrarily. > > The only slightly suspicious slab I see is buffer_head. > /sys/kernel/debug/kmemleak has a single entry in it, not > related to NFSD. > > At this point I'm kind of suspecting that the issue will > not be related to NFSD or SUNRPC or any particular slab > cache, but will be orphaned whole pages. Your bisect > still seems like the best shot at localizing the > misbehavior. > > > -- > Chuck Lever > >
