5.15-stable review patch. If anyone has any objections, please let me know.
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From: Jonathan Curley jcurley@purestorage.com
[ Upstream commit dd2fa82473453661d12723c46c9f43d9876a7efd ]
Typo in ff_lseg_match_mirrors makes the diff ineffective. This results in merge happening all the time. Merge happening all the time is problematic because it marks lsegs invalid. Marking lsegs invalid causes all outstanding IO to get restarted with EAGAIN and connections to get closed.
Closing connections constantly triggers race conditions in the RDMA implementation...
Fixes: 660d1eb22301c ("pNFS/flexfile: Don't merge layout segments if the mirrors don't match") Signed-off-by: Jonathan Curley jcurley@purestorage.com Signed-off-by: Trond Myklebust trond.myklebust@hammerspace.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nfs/flexfilelayout/flexfilelayout.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 798e2e32b3fb6..24d97d7ba12d5 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -270,7 +270,7 @@ ff_lseg_match_mirrors(struct pnfs_layout_segment *l1, struct pnfs_layout_segment *l2) { const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1); - const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l1); + const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l2); u32 i;
if (fl1->mirror_array_cnt != fl2->mirror_array_cnt)