Sorry, here is the patch.
----- Original Message -----
From: "Sebastian Kun" <seb@xxxxxxxxxxxxx>
Cc: "James A Goodwin" <jagoodwi@xxxxxxxxxx>; "Steve Cooper"
Sent: Thursday, May 23, 2002 11:07 AM
Subject: XFS stack overflow
> There are several routines in XFS that use up an inordinately large amount
> of the 6KB per-process stack (6496 bytes with the kernel we're using).
> worst offender is xfs_dir2_sf_to_block, which puts a 2KB char array right
> the stack. This has contributed to stack overflows during heavy writing.
> The attached patch changes this routine so that it kmallocs the structure
> I've seen this problem with both XFS 1.1, and the XFS-2.4.18 patch located
> on the FTP site. I looked at the web CVS tree today, and it also has this
> potential for overflow.
> System specs:
> 2x1.26GHz P3-T, Intel SDS2, 3GB RAM, 1TB RAID5 array
> Kernel version: 2.4.18 with SMP, 4GB Highmem with 2GB/2GB split, KDB, and
> frame pointers
> + Neil Brown's Bd-nfsall NFS server patch and Trond's nfs_all client
> patch (minus TCP server code)
> XFS patch: xfs-1.1 (XFS_FS=y, XFS_RT not set, XFS_QUOTA=y, XFS_DMAPI=y)
> mkfs: -f -d sunit=128,swidth=1664 -l size=32768b
> mount: defaults,noatime,sunit=128,swidth=1664,logbufs=8
> Sebastian Kun
> Driver developer, Consensys RAIDZONE
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