Do not use waitable allocation of pbuf when creating cluster for write.
Previously just ensuring that we do not sleep when clustering for md(4) vnode was enough. Now, with the switch of the pbuf allocator to uma and completely broken per-subsystem pbuf limits, it might cause unbounded sleep even for non-md(4) vnodes. Reported and tested by: pho Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D22899
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=356038
@ -865,8 +865,7 @@ cluster_wbuild(struct vnode *vp, long size, daddr_t start_lbn, int len,
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(tbp->b_bcount != tbp->b_bufsize) ||
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(tbp->b_bcount != size) ||
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(len == 1) ||
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((bp = uma_zalloc(cluster_pbuf_zone,
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(vp->v_vflag & VV_MD) != 0 ? M_NOWAIT : M_WAITOK)) == NULL)) {
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((bp = uma_zalloc(cluster_pbuf_zone, M_NOWAIT)) == NULL)) {
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totalwritten += tbp->b_bufsize;
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bawrite(tbp);
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++start_lbn;
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